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GE Corometrics 250 Series Service Manual
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GE Corometrics 250 Series Service Manual

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GE Healthcare
Corometrics
Service Manual
250 Series Monitor
™
Corometrics 250 Series Monitor
English
2020551-001 D (paper)
© 2006 General Electric Company.
All Rights Reserved.

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Summary of Contents for GE Corometrics 250 Series

  • Page 1 GE Healthcare Corometrics 250 Series Monitor ™ Service Manual Corometrics 250 Series Monitor English 2020551-001 D (paper) © 2006 General Electric Company. All Rights Reserved.
  • Page 3 GE Healthcare ™ Corometrics 250 Series Monitor Service Manual Corometrics 250 Series Monitor English 2020551-001 D (paper) © 2006 General Electric Company. All Rights Reserved.
  • Page 4 GE Medical Systems Information Technologies as repairable. Refer to the 250 Series Service Manual for further information.
  • Page 5 0086 Compliance A GE brand Corometrics 250 Series Monitor bears CE mark CE-0086 indicating its conformity with the provisions of the Council Directive 93/42/ EEC concerning medical devices and fulfills the essential requirements of Annex I of this directive. The device is manufactured in India; the CE mark is applied under the authority of Notified Body BSI (0086).
  • Page 6 0086 CE- ii...

  • Page 7: Table Of Contents

    Contents Introduction ........1-1 Revision History ........... . . 1-1 Safety Information .
  • Page 8 Peripheral Components ..........2-14 Nellcor®...
  • Page 9 Maintenance ........4-1 Maintenance Schedule ..........4-3 Visual Inspection .
  • Page 10 FECG Test ............4-26 Ultrasound Test .
  • Page 11 Before You Begin Electronic Calibration ....... . 4-53 General ............4-53 Handling Precautions .
  • Page 12 Blood Pressure Troubleshooting ........5-50 Maternal Pulse Oximetry Troubleshooting .
  • Page 13 Alarms Summary ....... . .B-1 Electromagnetic Compatibility .....C-1 Electromagnetic Compatibility (EMC) .
  • Page 14 viii 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 15: Introduction

    Introduction Revision History Each page of this manual has a revision letter located at the bottom of the page. This letter identifies the revision level of the entire manual. This may be important if you have different manuals and you do not know which is the most current. For the initial release, all pages have the revision letter A.
  • Page 16 For your notes 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 17: Safety Information

    Caution, Important, and Note are used throughout the manual. In addition, standard equipment symbols are defined. Responsibility of the Manufacturer GE is responsible for the effects on safety, reliability, and performance if: assembly operations, extensions, readjustments, modifications, or repairs are carried out by persons authorized by GE;...

  • Page 18: Hazard Definitions

    Introduction: Safety Information Hazard Definitions Six types of special notices are used throughout this manual. They are: Danger, Warning, Caution, Contraindication, Important, and Note. The warnings and cautions in this Safety section relate to the equipment in general and apply to all aspects of the monitor.

  • Page 19: Product Specific Hazards

    In addition, proper placement of the paddles in relation to the electrodes is required to minimize harm to the patient. DEFIBRILLATION PROTECTION—When used with the GE Medical Systems Information Technologies-recommended accessories, the monitor is protected against the effects of defibrillator discharge.
  • Page 20 Introduction: Safety Information WARNINGS ELECTROSURGERY—The monitor is not designed for use with high-frequency surgical devices. In addition, measurements may be affected in the presence of strong electromagnetic sources such as electrosurgery equipment. EXPLOSION HAZARD—Do not use this equipment in the presence of flammable anesthetics or inside an oxygen tent.
  • Page 21 Introduction: Safety Information WARNINGS LINE ISOLATION MONITOR TRANSIENTS—Line isolation monitor transients may resemble actual cardiac waveforms, and thus cause incorrect heart rate determinations and alarm activation (or inhibition). MRI USE—Do not use the electrodes during MRI scanning; conducted current could potentially cause burns. PATIENT CABLES AND LEADWIRES—Do not use patient cables and electrode leads that permit direct connection to electrical sources.

  • Page 22: Cautions

    CAUTIONS ANNUAL SERVICING—For continued safety and performance of the monitor, verify the calibration, accuracy, and electrical safety of the monitor annually. Contact your GE Medical Systems Information Technologies Service Representative. DAILY TESTING—It is essential that the monitor and accessories be inspected every day.

  • Page 23: Electromagnetic Interference

    Turn equipment in the vicinity off and on to isolate the offending equipment. Reorient or relocate the other receiving device. Increase the separation between the interfering equipment and this equipment. If assistance is required, contact your GE Medical Systems Information Technologies Service Representative. Revision D...

  • Page 24: Equipment Symbols

    Introduction: Equipment Symbols Equipment Symbols The following is a list of symbols used on products manufactured by GE. Some symbols may not appear on your unit. Equipment Symbols ATTENTION: Consult accompanying documents. This symbol indicates that the waste of electrical...

  • Page 25: Service Requirements

    Any unauthorized attempt to repair equipment under warranty voids that warranty. It is the user’s responsibility to report the need for service to GE Medical Systems Information Technologies or to one of GE’s authorized agents. Failure on the part of the responsible individual, hospital or institution using this equipment to implement a satisfactory maintenance schedule may cause undue equipment failure and possible health hazards.

  • Page 26: Intended Use

    Fetal Monitoring A Corometrics 250 Series Monitor can be used for routine non-invasive and invasive fetal monitoring throughout labor and delivery (i.e., fetal heart rate and uterine activity monitoring). Fetal movement detection and Spectra Alerts are options that may be purchased.

  • Page 27: Related Manuals

    Introduction: Service Requirements Related Manuals Manual Title 2020550-001 250 Series Operator’s Manual 15457 Maternal/Fetal Monitoring, Clinical Application 2004435-001 Information For Prescribers Revision D 250 Series Maternal/Fetal Monitor 1-13 2020551-001...
  • Page 28 Introduction: Service Requirements 1-14 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 29: Equipment Overview

    Equipment Overview Revision D 250 Series Maternal/Fetal Monitor 2020551-001...
  • Page 30 For your notes 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 31: Equipment Description

    Equipment Overview: Equipment Description Equipment Description The 250 Series Fetal Model monitors two Fetal Heart Rate channels plus Uterine Activity (TOCO or IUP). The 250 Series Maternal/Fetal Model monitors maternal NIBP, SpO and MECG, in addition to the features found in the Fetal Model. A feature summary follows: Fetal Only Monitor Maternal/Fetal Monitor...

  • Page 32: Front Panel Description

    Equipment Overview: Front Panel Description Front Panel Description FECG TOCO 165 172 NIBP MECG MSpO2 15:00 130/ 85 MAP (107) 03:15 25 mm/s II 2x FECG 03:22:45 Print Freeze Alarms Setup VSHX Monitor Front Table 1. Front Panel Name Description Display The monitor’s display is divided into several sections.
  • Page 33 Equipment Overview: Front Panel Description Table 1. Front Panel Name Description Mark [Offset] Button The Mark [Offset] button is a multi-function button. Mark: Pressing this button prints an event mark on strip chart paper (on the bottom two lines of the top grid). Offset: When the Heart Rate Offset mode is enabled, pressing and holding this button shifts the secondary FHR trend +20 bpm for visibility purposes.
  • Page 34 Equipment Overview: Front Panel Description Table 1. Front Panel Name Description FHR2 Volume Decrease Button The four Volume buttons raise ( ) and lower ( ) the volume of sound emitted by the rear panel speaker. The upper pair controls the volume for FHR1. The lower pair FHR2 Volume Increase Button controls the volume for FHR2.

  • Page 35: Front Panel Displays

    Equipment Overview: Front Panel Displays Front Panel Displays The monitor is divided into two main sections: patient information (the left-side of the monitor) and monitor functionality (the right-side of the monitor). The keys are ordered for user efficiency.The content and layout of the display can change, depending on which functions are installed in the monitor and the modes of operation in use.

  • Page 36: Display Example

    All alarms are enabled as indicated by Maternal/Fetal Monitor Display Example Setup Screens Review Chapters 3 and 4 of the Corometrics 250 Series Operator’s Manual for information on the individual parameters and setup screens. Softkeys A softkey is an area on the screen that can be selected with the Trim Knob control.

  • Page 37: Waveform Softkeys

    Equipment Overview: Softkeys Waveform Softkeys The waveform title is a softkey used to select the waveform for display or to disable the area. The ECG Scaling and MECG lead labels are softkeys used to configure the waveform currently displayed. Dedicated Softkey Area Softkeys are located at the bottom of each screen.
  • Page 38 Equipment Overview: Softkeys TOCO 165 172 NIBP MECG MSpO 02:15 130/ 85 MAP (107) 03:15 25 mm/s II Auto 09:22:06 MECG 09:21:41 Frozen Print Freeze Alarms Setup VSHX Maternal/Fetal Monitor Display Summary Table 3. Display Summary Name Description Mode Title Softkeys Selects US, US2, FECG, NIBP, MHR/P, or MSpO Setup screens.
  • Page 39 Equipment Overview: Softkeys TOCO 154 135 Vital Signs History Date: 24-Mar 24-Mar 24-Mar 24-Mar 24-Mar Time: 12:00 12:10 12:20 12:30 12:40 NIBP MSpO2 MECG HX Interval: 10 min Print PrintAll View Exit l Maternal Vital Signs History Screen Softkeys Table 4. Maternal Vital Signs History Screen Softkeys Name Description Print Softkey...

  • Page 40: Rear Panel Description

    OR ON THE ORDER OF 0086 A PHYSICIAN. J101 J104 GE Medical Systems Information Technologies, Inc 8200 West Tower Avenue; Milwaukee, WI, USA European Representative GE Medical Systems Information Technolgies GmbH Munzinger Stra e 3-5; D-79111 Freiburg Germany 100 -120V ~ 50-60HZ 100W...
  • Page 41 J109, J110, and J111 RS-232C Three serial RJ-11 connectors are provided for interfacing Communications Connectors to peripheral equipment. Contact your GE Service Representative for more information. ECG Out Connector External recorder connector for MECG signals. The standard output level is 1 V/mV.

  • Page 42: Optional Components

    Adding Spectra Alerts The monitor can be upgraded to include Spectra Alerts. Refer to Appendix D of the Corometrics 250 Series Operator’s Manual for more information. Adding Fetal Movement Detection The monitor may be upgraded to include Fetal Movement Detection. Contact your GE Service Representative for further information.

  • Page 43: Nellcor Puritan Bennett Model N-400 Fetal Pulse Oximeter

    Equipment Overview: DINAMAP® Models PRO Series 100-400 and ProCare the external monitor, determine the baudrate setting for the 250 Series monitor. Then exit the service mode screens. Access the General Setup screen and choose the time interval for printing the MSpO values on the strip chart paper.

  • Page 44: Quantitative Sentinel/Perinatal System

    Equipment Overview: Quantitative Sentinel/Perinatal System ILC-1926 An ILC-1926 is required to interface with the DINAMAP PRO Series and ProCare Monitors. Quantitative Sentinel/Perinatal System Through this interface, the 250 Series Monitor outputs MHR data, FHR data, and UA data to a central information such as a Quantitative Sentinel/Perinatal System. Annotations made at the central station can be optionally printed on the strip chart paper of the 250 Series Monitor as summarized below (if the central station has the capability to send the command):...
  • Page 45 Equipment Overview: Quantitative Sentinel/Perinatal System Table 6. External Device Summary Interconnect Cable 250 Series Communications Cat. No. External Device Parameter(s) Baudrate Protocol 1 ft 6 ft MSpO Refer to 1557AAO 1557BAO Nellcor ® Nellcor Model N-200 applicable ® NIBP 1562AAO 1562BAO Critikon manufacturer’s...

  • Page 46: Theory Of Operation

    Equipment Overview: Theory of Operation Theory of Operation Systems Overview The 250 Series system is made up of front-end and back-end PWAs, system power supply, and recorder module. The main PWA forms the heart of the monitor control functions. This PWA along with the Communications PWA form the back end of the monitor.
  • Page 47 Equipment Overview: Theory of Operation Revision D 250 Series Maternal/Fetal Monitor 2-19 2020551-001...
  • Page 48 Equipment Overview: Theory of Operation Digital System Processor (DSP) Display PWA The DSP Display PWA consists of two independent functioning modules: the DSP and the Display interface. The DSP processes analog and digital data from the front- end modules and interfaces to the main processor. The ECG and ultrasound analog information is processed and heart rates are output to the main board via a shared memory.
  • Page 49 Equipment Overview: Theory of Operation Revision D 250 Series Maternal/Fetal Monitor 2-21 2020551-001...
  • Page 50 Equipment Overview: Theory of Operation Main Board PWA The Main Board makes up the central processing unit for the 250 Series Fetal Monitor. The Main Board accepts simultaneously processed parameters directly from four separate modules. The minimum configuration monitor has only the DSP board as an input module.
  • Page 51 Equipment Overview: Theory of Operation internal SpO cable that in turn connects to the SpO Carrier PWA. The MSpO connector PWA keeps the sensitive analog SpO signals shielded on the inner layers of the board. R1 and R2 are 0 Ohm resistors that are used to provide a means of disconnecting the shorts between pins 4 and 9 and pins 8 and 11 if needed.
  • Page 52 Equipment Overview: Theory of Operation digitized and sent over the barrier via an opto coupler where it is routed similarly to the FECG analog signal. The uterine pressure front-end processes the pressure signals from the external TOCO or IUP sensor (uses same inputs) by amplifying and filtering the inputs and converts the signals via serial analog to digital converter.
  • Page 53 Equipment Overview: Theory of Operation FECG signals as well as the MECG mode lines. The MECG analog signals are routed separately from the front panel to the MECG daughter PWA. The MSpO input signals enter the SpO carrier PWA directly. Video Decoder PWA The decoder PWA interfaces between the DSP/display PWA and the LCD panel.
  • Page 54 Equipment Overview: Theory of Operation 2-26 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 55: Installation

    Installation 250 Series Maternal/Fetal Monitor Revision D 2020551-001...
  • Page 56 For your notes 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 57: Tools Required

    Installation: Tools Required Tools Required Refer to “Preventative Maintenance Inspection Report” on page 4-58 for a list of required tools. Connections Fetal Acoustic Stimulator This connector is provided for connection to a Corometrics Model 146 Fetal Acoustic Stimulator. Remote Marks Connector This connector is provided for connection to an optional Corometrics Remote Event Marker.

  • Page 58: J101 Connector (Model 340 Telemetry System Interface)

    Installation: Connections J101 Connector (Model 340 Telemetry System Interface) NOTE: For additional information, This connector is for future interfacing to the receiver of a Corometrics Model 340 refer to the Model 340 Service Manual, Telemetry System. P/N 2006920-001. A telemetry indicator is displayed beneath the FHR1 mode field: you connect a telemetry receiver to the 250 Series Monitor;...

  • Page 59: J109, J110, And J111 Connectors (Rs-232C)

    DINAMAP ProCare Monitors Quantitative Sentinel/Perinatal System (any RS-232C connector) When shipped from the GE factory, all three ports are configured as follows: Communications Setup = Nellcor baudrate (bps) = 2400 At the above settings, connectors J109 and J111 are ready for connection to an NPB Model N-200.

  • Page 60: Power

    Connect the detachable line cord to the rear panel power connector; plug the other end into a hospital grade grounded wall outlet of appropriate voltage. (If you are unsure about the voltage, contact your hospital Biomedical Engineering Department or GE Service Representative.) 250 Series Maternal/Fetal Monitor Revision D...

  • Page 61: Self-Test Routine

    Installation: Self-Test Routine Attaching the Power Cord Turn the monitor’s power on. The green indicator light, located near the upper left-hand corner of the Light button, illuminates and a series of tones are heard, indicating that the monitor has been turned on. Self-Test Routine The 250 Series Monitor contains a self-test routine which checks the calibration and internal circuitry of the monitor.

  • Page 62: Battery-Backed Ram Status

    AC power. Information on setting the time and date is found in the General Setup screen section in Chapter 4 of the Corometrics 250 Series Monitor Operator’s Manual. 250 Series Maternal/Fetal Monitor...

  • Page 63: Setup

    (re-alarm time). The re-alarm time is adjustable from the password-protected Install Options Screen 2. For further information, refer to Chapter 11, “Alarms” in the Corometrics 250 Series Operator’s Manual. The monitor also alerts you when paper is running low and when the recorder is completely out of paper.
  • Page 64 Installation: Setup Press down on the latch on the right side of the strip chart recorder door. Fan the pack of Z-fold paper on all sides to loosen any folds and to ensure proper feed of the paper through the recorder. Hold the package of paper so that: the black squares are on the bottom of the pack;...
  • Page 65 Installation: Setup paper is compatible with and required for the 250 Series. Unfold two sheets from the top of the package so that they extend toward you. Place the pack in the drawer so that the pack is laying flat in the recorder. Slowly close the strip chart recorder door, being careful not to skew the paper.

  • Page 66: Mounting A Strain Gauge

    Installation: Service Mode Screens Mounting a Strain Gauge To mount a strain gauge post, refer to the manufacturer’s directions. Setup Screens The 250 Series Monitor provides a variety of options that are all selected using setup screens shown on the display. All functions are performed easily using the front panel Trim Knob.

  • Page 67: Service Lock Screen

    Installation: Service Mode Screens Service Lock Screen “Service Lock Screen” on page 3-13, is used to access the remaining service screens. It displays the following information: Keypad Version MSpO For Nellcor: Nellcor 506 or NELL-3 Version and Date For Masimo: DSP: Version, MCU: Version, PID: Version For Ohmeda Oximetry: Version NIBP Version CPU Version...

  • Page 68: Install Options Screens

    Installation: Service Mode Screens Install Options Screens Install Options Screen 1 Language: English Line Frequency: 60 Hz Scaling: 30-240 Recorder Font Size: Large VS Print Interval: Real Time Paper Speed: 3 cm/min Paper Chime: Low/Out Paper Volume: HBC: HR Offset: FM Remote Mark: Scale: Auto...
  • Page 69 Installation: Service Mode Screens Language This field is used to set the language shown on the display and printed on the strip chart recorder paper. Use the Trim Knob control to cycle through the available options: English, Spanish, French, German, Dutch, Swedish, and Italian. (The monitor is factory set for the country in which it is being used.) Line Frequency This field is used to define the line power frequency for the country in which the...
  • Page 70 Installation: Service Mode Screens Paper Volume This field sets the volume of the paper chime. As you adjust the volume, a sample tone sounds. You can choose from a range of 1 to 9 (1 = lowest, 9 = loudest). HBC (Heartbeat Coincidence) The heartbeat coincidence feature alerts you when there is the possibility that you may be monitoring a duplicate signal.
  • Page 71 Installation: Service Mode Screens FM Remote Mark This field configures the marker annotation that is printed on the strip chart paper whenever a patient presses the button on the Remote Marker accessory. Use the Trim Knob control to alternate between On and Off. The factory default setting is Off. annotation is commonly used to record an “event”;...
  • Page 72 Installation: Service Mode Screens FECG Artifact Elimination This field is used to enable/disable FECG Artifact Elimination which affects only the direct FECG mode. Use the Trim Knob to alternate between On and Off. (The factory default setting is Off.) When On is selected, any new heart rate value which differs by more than ±25 bpm from the previously calculated heart rate is not printed on the strip chart paper.
  • Page 73 Installation: Service Mode Screens NIBP 1 min Interval This field is used to enable/disable the 1 minute interval selection on the maternal BP Setup screen. Use the Trim Knob control to alternate between On and Off. (The factory default setting is Off.) NIBP Display Setting this field to a value reduces the chance of error.

  • Page 74: Printing System Setup Information

    Installation: Printing System Setup Information Store Current To Hospital Select this option if you wish to store your current monitor settings as your hospital’s preferred default settings. When you select this option, the Default Settings: softkey reflects the change (i.e., Default Settings: change to Hospital). Printing System Setup Information Use the Trim Knob to select the PrintAll softkey on the bottom of Install Options Screen 1 to see an overall summary of the monitor’s setup screens.

  • Page 75: Communications Setup Screen

    Installation: Communications Setup Screen Communications Setup Screen The Communications Setup screen, allows you to configure the unit’s J109, J110, and J111 RS-232C Serial Interface ports for connecting to optional peripheral equipment. Each port is configured for baudrate and mode. To use the Communications Setup screen: Select the Service softkey from the General Setup screen.

  • Page 76: Configuration Switches

    Installation: Configuration Switches Configuration Switches The switches configure the operational characteristics of the 250. Switch Name Setting Factory Test Off = Enabled J102 Levels Off = HP, On = Coro RESERVED Set to Off NIBP Option Off = Enabled 5:Off 6:Off = Nellcor 5:Off 6:On = Ohmeda MSpO Option...

  • Page 77: Factory Defaults

    Installation: Factory Defaults Factory Defaults Table 1. Summary of Factory Defaults Setup Field Description Factory Default Default Options Hospital Preference Screen FECG or FHR Volume US/US2 FHR Alarm Limits High Low 200-140, Off 160 120 bpm 60-140, Off Audio Alarms On, Off Volume NIBP...
  • Page 78 Installation: Factory Defaults Table 1. Summary of Factory Defaults Setup Field Description Factory Default Default Options Hospital Preference Screen MSpO Response Time Fast Normal, Fast (Nellcor 506) Response Time Fast Fast (Nellcor NELL-3) Averaging Time (Masimo) 8 seconds 2, 4, 8, 10, 12, 14, 16 seconds Sensitivity (Masimo) Normal Normal, Maximum...
  • Page 79 Installation: Factory Defaults Table 1. Summary of Factory Defaults Setup Field Description Factory Default Default Options Hospital Preference Screen General Play Song Off, Happy Birthday, Brahms’ Setup Lullaby, Rock-a-Bye-Baby, All Song Volume Brightness 0-9 (nine = brightest) Paper Speed United States: 3 cm/min 1-3 cm/min International: 1 cm/min Date...
  • Page 80 Installation: Factory Defaults Table 1. Summary of Factory Defaults Setup Field Description Factory Default Default Options Hospital Preference Screen Install Language Set according to shipping Set according to shipping Options destination destination Screen 1 Line Frequency United States: 60 Hz 50 Hz, 60 Hz (Service) International: 50 Hz...

  • Page 81: Maintenance

    Maintenance Revision D 250 Series Maternal/Fetal Monitor 2020551-001...
  • Page 82 For your notes 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 83: Maintenance Schedule

    Maintenance: Maintenance Schedule Maintenance Schedule Maintenance Self-Test Cleaning Calibration Frequency Frequency Frequency TOCO as needed U/S Transducers as needed MECG Cables as needed Main Board Battery as needed Monitor Exterior as needed Monitor vacuum interior Before each monitoring session Printhead as needed Main Board power supply voltages annually or when the monitor...

  • Page 84: Visual Inspection

    Maintenance: Maintenance Schedule Maintenance Self-Test Cleaning Calibration Frequency Frequency Frequency Measure voltage breakdown Mains to Chassis using DC voltage for 1 hi-pot voltage tester 2.121 kVdc min. Display Check Verify DSP board operation, Remove, Replace, Upgrade Trimline TOCO Calibration As needed Nautilus TOCO Calibration As needed MSpO...

  • Page 85: Cleaning

    Maintenance: Cleaning Cleaning General care and cleaning are required for the 250 Series Monitor and its accessories. If an accessory is not listed, consult the manufacturer’s instructions. CAUTION Unplug the monitor from the AC power source and detach all accessories from the monitor. Do not immerse accessories in any liquid.

  • Page 86: Display

    Maintenance: Cleaning Display To clean the display screen, use a soft, clean cloth dampened with a glass cleaner. Do not spray the glass cleaner directly onto the display. Do not use alcohol or hospital disinfectants like Cidex* or Betadine. Tocotransducer and Ultrasound Transducer CAUTIONS ABRASION—Do not use abrasive cloth, sharp objects, or abrasive cleaners.

  • Page 87: Maternal Nibp Cuffs And Hoses

    Maintenance: Cleaning Dampen a cloth or paper towel with one of the following products; then wring out until only slightly wet: Sodium Hypochlorite 5.25% (Bleach) diluted 10:1 Cidex* Sporicidin* Soap and water Rub soiled area until clean. Dry with a soft, dry cloth. Maternal NIBP Cuffs and Hoses General The cuff must be thoroughly cleaned with the specified detergent before reuse.

  • Page 88: Periodic Thermal Printhead Cleaning

    Allow 2 hours for drying. The user has the responsibility to validate any deviations from the recommended method of cleaning and disinfection. For additional information on infection control procedures, contact GE Medical Systems Information Technologies Technical Support. Sensors Adhesive sensors are sterile and for single use only. Reusable sensors should be cleaned before reuse with a 70% alcohol solution.

  • Page 89: Disposal Of Product Waste

    Maintenance: Disposal of Product Waste After cleaning, rinse the transducer thoroughly in distilled water and replace the dome loosely. Dry the transducer with sterile gauze. CAUTIONS AUTOCLAVE—Do not autoclave pressure transducer. IMMERSION—Do not immerse any part of the electrical connector of the transducer in the cleaning solution at any time. Examine the outer sheath of the cable for perforations.

  • Page 90: Packaging Material

    If you have questions concerning disposal of the product, please contact GE Medical Systems Information Technologies or its representatives. Electrical Safety Tests Refer to the “Preventative Maintenance Inspection Report”...

  • Page 91: Patient-To-Ground Leakage For Ecg

    Maintenance: Electrical Safety Tests Verify the following: < 300 µA (100, 120, 220, 230, or 240 VAC monitors) Record the primary leakage for the following conditions: Table 1. Unit to Primary Leakage Conditions Neutral Ground Power (Polarity) Closed Closed Normal Closed Open Normal...

  • Page 92: Patient-To-Line Leakage For Ecg

    Maintenance: Electrical Safety Tests Patient-to-Line Leakage for ECG Connect an ECG test body to the monitor’s front panel ECG input. The ECG test body can be the assembly leakage cable. Set the fixture’s Leakage switch to Line. Turn ON the monitor using the monitor’s power switch. Verify the following: <...

  • Page 93: Patient-To-Line Leakage For Iup

    Maintenance: Electrical Safety Tests Patient-to-Line Leakage for IUP Connect an IUP test body to the monitor’s front panel UA input. The IUP test body can be a SensorTip transducer (wrapped in aluminum foil) or the assembly leakage cable. Set the fixture’s Leakage switch to Line. Turn ON the monitor using the monitor’s power switch.

  • Page 94: Patient-To-Line Leakage For Mspo

    Maintenance: Electrical Safety Tests Patient-to-Line Leakage for MSpO test body to the monitor’s front panel MSpO Connect an MSpO input. Use the assembly leakage cable for the test body. Set the fixture’s Leakage switch to Line. Turn ON the monitor using the monitor’s power switch. Verify the following: <...

  • Page 95: Patient-To-Line Leakage For Us

    Maintenance: Electrical Safety Tests Patient-to-Line Leakage for US Connect an US test body to the monitor’s front panel US input. The US test body should be an ultrasound transducer wrapped in aluminum foil. Set the fixture’s Leakage switch to Line. Turn ON the monitor using the monitor’s power switch.

  • Page 96: Patient-To-Line Leakage For Us2

    Maintenance: Electrical Safety Tests Patient-to-Line Leakage for US2 Connect an US test body to the monitor’s front panel US2 input. The US test body should be an ultrasound transducer wrapped in aluminum foil. Set the fixture’s Leakage switch to Line. Turn ON the monitor using the monitor’s power switch.
  • Page 97 Maintenance: Electrical Safety Tests Hi-Pot Tester DC Out Ground 250 Series Monitor FECG TOCO 165 172 NIBP MECG MSpO2 15:00 130/ 85 MAP (107) 120 Monitor 03:15 25 mm/s II 2x AC Power Cord FECG 03:22:45 Print Freeze Alarms Setup VSHX Assembly Leakage Cable Patient–to–AC-Line Using DC Voltage for 1 Minute (5.656 kVdc)
  • Page 98 OR ON THE ORDER OF 0086 A PHYSICIAN. J101 J104 GE Medical Systems Information Technologies, Inc 8200 West Tower Avenue; Milwaukee, WI, USA European Representative GE Medical Systems Information Technolgies GmbH Munzinger Stra e 3-5; D-79111 Freiburg Germany 100 -120V ~ 50-60HZ 100W...

  • Page 99: Checkout

    OR ON THE ORDER OF 0086 A PHYSICIAN. J101 J104 GE Medical Systems Information Technologies, Inc 8200 West Tower Avenue; Milwaukee, WI, USA European Representative GE Medical Systems Information Technolgies GmbH Munzinger Stra e 3-5; D-79111 Freiburg Germany 100 -120V ~ 50-60HZ 100W...

  • Page 100: Equipment Required

    Maintenance: Self-Test Routine Equipment Required The following items are necessary for performing any of the tests in this procedure: Corometrics Model 325 Simulator and corresponding line cord 250 Series Monitor interconnect cables Ultrasound Transducers (x2) Tocotransducer Strain Gauge Transducer Self-Test Routine The 250 Series Monitor contains test routines which verify the unit’s calibration and internal circuitry.
  • Page 101 Maintenance: Self-Test Routine NOTE: The monitor will add 50 mmHg to raw pressure data. In other words, the value is always referenced to 0 mmHg regardless of any UA referencing attempt. NOTE: The recorder returns to its original on, off, or maternal-only mode state from when the Test button was depressed.

  • Page 102: Front Panel Button Test

    Maintenance: Front Panel Button Test Front Panel Button Test This procedure ensures the functionality of the front panel buttons. Apply power to the 250 Series Monitor. Disconnect all transducers from the front panel. Depress the monitor’s Record button and verify the following: The yellow indicator next to the button illuminates continuously.

  • Page 103: Mecg Test

    Maintenance: MECG Test Connect the sub-cables of the other end of the simulator interconnect cable into the color-coded connectors on the monitor/adapter: ECG, US, and UA. Turn on the Model 325 Simulator. Verify that the green Power indicator illuminates. Turn on the 250 Series Monitor. MECG Test This portion of the functional checkout procedure ensures the integrity of the MECG circuitry and the heart rate channel of the recorder.
  • Page 104 Maintenance: MECG Test Table 9. MECG Test Simulator Settings Section Switch Setting Rate/CMR RATE Rate MANUAL FECG/MECG Mode MECG QRS Amplitude 500 µV QRS Polarity GENERAL Pattern Memory Main Mode TOCO 10. Repeat Step 9 for each of the following rates: 30, 120, 210, and 240 bpm. 11.
  • Page 105 Maintenance: MECG Test 14. Set the simulator’s ECG Mode switch to the Off position. MECG Ramp MECG Oscillation Revision D 250 Series Maternal/Fetal Monitor 4-25 2020551-001...

  • Page 106: Fecg Test

    Maintenance: FECG Test FECG Test This portion of the functional checkout procedure ensures the integrity of the FECG circuitry and the heart rate channel of the recorder. Connect the simulator’s ECG cable to the FECG connector on the monitor’s “Y” adapter cable.
  • Page 107 Maintenance: FECG Test Table 10. FECG Test Simulator Settings Section Switch Setting Rate/CMR RATE Rate MANUAL FECG/MECG Mode FECG QRS Amplitude 15 µV QRS Polarity GENERAL Pattern Memory Main Mode TOCO Repeat Step 7 for each of the following rates: 30, 60, 210, and 240 bpm. Change the simulator’s QRS Polarity switch from + to –.
  • Page 108 Maintenance: FECG Test The recorder prints an oscillation of 15 bpm between 110 and 125 bpm on the top grid of the strip chart paper. (Refer to figure “FECG Artifact Elimination” on page 4-29.) ∆ 16. Repeat Step 15 for the rate value of 22.

  • Page 109: Ultrasound Test

    Maintenance: Ultrasound Test FECG Artifact Elimination Ultrasound Test This portion of the functional checkout procedure ensures the integrity of the ultrasound circuitry and the heart rate channel of the recorder. Connect the simulator’s US cable to the US connector on the monitor. Set the switches on the Model 325 Input Simulator according to Table If not already on, depress the monitor’s Record button.
  • Page 110 Maintenance: Ultrasound Test Use the simulator’s Manual Adjustment knob to decrease the heart rate value by more than 13 bpm from the 120 bpm baseline. Verify the following on the monitor: The FHR1 value immediately reflects this new input rate. The strip chart recorder prints at the last input rate for an additional 3 seconds before blanking the heart rate data and printing a continuous line at the new input rate.

  • Page 111: Fetal Movement Detection Test

    Maintenance: Fetal Movement Detection Test Ultrasound Ramp Fetal Movement Detection Test This portion of the functional checkout procedure ensures the integrity of the fetal movement detection circuitry and the heart rate channel of the recorder. (Refer to figure “Fetal Movement Detection” on page 4-32.) Connect the simulator’s US cable to the US connector on the monitor.

  • Page 112: Ultrasound Transducer Test

    Maintenance: Ultrasound Transducer Test Table 12. Fetal Movement Detection Test Simulator Settings Section Switch Setting Mode US/FMD Signal Level Ultrasound/FMD Rate MANUAL Main Mode TOCO Fetal Movement Detection Ultrasound Transducer Test Inspect an ultrasound transducer as follows: Ensure there are no cracks around the transducer face. Visibly inspect the condition of the cable, strain relief, and connector pins.

  • Page 113: Uterine Activity Test

    Maintenance: Uterine Activity Test The recorder prints the message US on the center margin of the strip chart paper after approximately 20 seconds. Gently rub each crystal of the ultrasound transducer rhythmically. (There are nine crystals. Eight are arranged around the circumference of the transducer; one is in the center.) Verify the following: Good sensitivity is apparent.
  • Page 114 Maintenance: Uterine Activity Test displayed accordingly and that the recorder prints a continuous line at the corresponding value on the uterine activity channel of the strip chart paper. Place the simulator’s UA Level switch at each of the level settings: 0, 10, 50, and 100 relative units.

  • Page 115: Testing The Tocotransducers

    Maintenance: Testing the Tocotransducers Uterine Activity Ramp Testing the Tocotransducers CAUTIONS LEAKAGE TEST—Perform a leakage and dielectric test on the tocotransducer per applicable standards. FUNCTIONAL TEST—Perform a functional response test on the tocotransducer. Inspect a Nautilus Tocotransducer as follows: Check for any cracks or contaminants on the tocotransducer especially on the diaphragm located on the bottom of the tocotransducer.

  • Page 116: Strain Gauge Transducer Test

    Maintenance: Strain Gauge Transducer Test Momentarily depress the monitor’s UA Reference button. Verify the following: The UA value shows the default setting. The UA mode shows TOCO. The recorder prints the messages UA REF and TOCO on the strip chart paper. Apply gentle pressure to the tocotransducer diaphragm and verify that the UA value responds to the pressure input.

  • Page 117: Pattern Memory Test

    Maintenance: Pattern Memory Test The UA value and mode are both blank. The recorder stops printing the uterine activity trace. The recorder prints the message UA INOP on the center margin of the strip chart paper after approximately 20 seconds. Pattern Memory Test The pattern memory of the simulator can be used to test any of the following mode combinations of the monitor.

  • Page 118: Dual Heart Rate Test (Non-Pattern)

    Maintenance: Dual Heart Rate Test (Non-Pattern) Verify the following on the monitor: Each heart rate area (FHR1, FHR2, and/or MECG) responds accordingly for value, mode, and heartbeat indicator. The UA area responds accordingly for value and mode. The recorder responds appropriately in both trending and message information.

  • Page 119: Dual Ultrasound Modes

    Maintenance: Dual Heart Rate Test (Non-Pattern) Table 14. Dual Heart Rate Test (Non-Pattern) Simulator Settings Section Switch Setting Rate/CMR RATE Rate 120 bpm FECG/MECG Mode FECG QRS Amplitude 50 µV QRS Polarity Mode ULTRASOUND/FMD Level Rate RAMP GENERAL Pattern Memory Dual Heart Rate, FECG and US Dual Ultrasound Modes As stated previously, the dual ultrasound mode of the 250 Series Monitor...

  • Page 120: Alarm Test

    Maintenance: Alarm Test Plug one ultrasound transducer into the monitor’s US input connector and the other into the monitor’s US2 connector. Verify the following on the monitor: The FHR1 mode shows US. The FHR2 mode shows US2. The FHR1 value shows three steady dashes “– – –.” The FHR2 value shows three steady dashes “–...
  • Page 121 Maintenance: Alarm Test 12. Set the switches on the Model 325 Input Simulator according to Table 13. Using the simulator’s Manual Adjustment knob, input an MECG signal of 119 bpm as indicated on the monitor. Verify that there is no alarm tone sounding from the monitor’s rear panel speaker.

  • Page 122: Mspo Test

    Maintenance: MSpO Test 22. Depress the monitor’s front panel Alarm Silence button and verify the following: The alarm tone is silenced. The MECG value continues flashing. The message ALARM SILENCE X:XX appears on the screen and a countdown is started. 23.

  • Page 123: Nibp Calibration And Testing

    Maintenance: NIBP Calibration and Testing The message MSpO2% stamps in the annotation line on the strip chart paper. A diamond (with MSpO and MHR/P vital signs) stamps in the annotation area on the strip chart paper at 2-minute intervals. NIBP Calibration and Testing Purpose This describes the information needed by a biomedical or service personnel to successfully verify or set calibration and perform field test procedures for the 250...

  • Page 124: Calibration Verification

    Maintenance: NIBP Calibration and Testing All NIBP calibration procedures are accessed from the NIBP Calibration screen. To access the NIBP Calibration screen: Navigate to Install Screen Options 1. Select Tests. Select NIBP Cal. The sequence of procedures for calibration of NIBP starts with Calibration Verification.

  • Page 125: Overpressure Detection

    Display Check There is no calibration or replacement procedure for either the Display Driver Board or the Power Controller Unit. Contact your GE Service Representative for information about repair/exchange of the entire display assembly. Revision D...

  • Page 126: Checking A Display

    11. If you suspect that the DSP Board is not supplying the correct voltage or one of the video signals is missing and you have another properly functioning 250 Series Monitor, substitute the DSP Board and check for proper operation. Contact your GE Service Representative for information about repair/exchange of the DSP Board. 4-46...

  • Page 127: Maternal Spo Calibration

    250 Series Monitor, substitute the entire display assembly and check for proper operation. Refer to “Checkout” and “Checkout”. Contact your GE Service Representative for ordering information. Maternal SpO Calibration The 250 Series Monitor automatically performs a self-test on the pulse oximetry module upon power up and whenever the MSpO module is reset.

  • Page 128: Main Board Sw1 Switch Settings

    Maintenance: J102 Analog Output Connector DAC Static Test Table 16. Hardware Switch Settings Switch # Description Setting Factory Test Off = Enabled J102 Output Levels Off = HP, On = Coro Reserved Set to Off NIBP Option Off = Enabled MSpO Option 5:Off 6:Off = Nellcor...

  • Page 129: Verification

    Maintenance: J102 Analog Output Connector DAC Static Test Use the Trim Knob control to select the J102 softkey at the bottom of the screen. The J102 screen displays. (See figure “J102 Analog Output Connector Screen” on page 4-50.) The Range and Voltage fields can be displayed using a decimal point or a comma as a separator.
  • Page 130 Maintenance: J102 Analog Output Connector DAC Static Test Calibration For calibration, you must use the specific values listed in Table 17 (Corometrics output levels) or Table 18 (Hewlett-Packard output levels). This tests the high and low ranges for the HR1, HR2, and UA signals. If a measured value does not fall within the given range, adjust the corresponding potentiometer accordingly (on Communications Board, No.

  • Page 131: Rs-232C Connector Loopback Test

    Verify that, after a few seconds, the status Loopback OK displays. OK indicates that the test has passed. NOTE: If Off remains displayed, the test has failed; contact your GE Service Representative. Do not use this port to connect to any peripheral equipment until the port or Communications Board has been serviced.

  • Page 132: Calibration

    This procedure is not intended to replace a complete instrument checkout and alignment as performed at the GE factory. It should be considered a performance check and troubleshooting guide to be used in conjunction with other information supplied throughout this service manual.

  • Page 133: Before You Begin Electronic Calibration

    Maintenance: Before You Begin Electronic Calibration Before You Begin Electronic Calibration General Refer to the assembly drawings for the location of adjustments and test points referred to in this section. The board assembly drawing numbers are given for each board in this section. The electronic calibration procedure outlined in this section necessitates removal of the monitor’s top cover.

  • Page 134: Isolated Power Supply Board Voltages

    Maintenance: Power Supply Voltages—Verification Table 20. Main Board Power Supply Voltages 2023111-001 Signal Name Voltage Level Pin 1 +12EL +12 Vdc ± 0.5 Vdc Pin 2 +20I +20 Vdc ± 0.5 Vdc Pin 3 +15BP +15 Vdc ± 0.5 Vdc Pin 4 –15V –15 Vdc ±...

  • Page 135: Recorder Photosensor Calibration

    Maintenance: Recorder Photosensor Calibration Recorder Photosensor Calibration Adjusting the Paper-Low Photosensor Load paper in the recorder. Ensure that there are no black squares showing to indicate a paper-low condition. Press the Record button to turn on the recorder. Allow the paper to advance for a few seconds in order to tension the paper.

  • Page 136: Adjusting The Paper-Loading Sensor

    Maintenance: Recorder Photosensor Calibration Adjusting the Paper-Loading Sensor Load paper in the recorder. Ensure that there are no black squares showing to indicate a paper-low condition. You must load at least nine sheets of paper. Using a digital voltmeter, connect the positive lead to J9 (pin 6) on the Recorder Board;...

  • Page 137: Repair Log

    Maintenance: Repair Log Repair Log Unit Serial Number Institution Name Maintenance/ Date Technician Date Repair Revision D 250 Series Maternal/Fetal Monitor 4-57 2020551-001...

  • Page 138: Preventative Maintenance Inspection Report

    Maintenance: Preventative Maintenance Inspection Report Preventative Maintenance Inspection Report Customer________________________ Customer Number________________ Date ____________________ FE________________________ FE ID ___________________Call Number __________________________ Equipment Serial Number __________________________ Software Revision CPU _________ DSP: ________ Configuration Model 256__________ Model 259 __________ Fetal Movement Detection (FMD) __________ Tools Required •...
  • Page 139 Maintenance: Preventative Maintenance Inspection Report Page Description Complete Actual Pass Fail Cleaning Clean the monitor exterior. Clean the monitor interior using a hand-held vacuum. Clean the recorder printhead. Clean the UA Strain Gauge. Clean the monitor accessories (TOCO, transducers, cables) Clean the monitor accessories (cuffs, hoses) Calibration Page...
  • Page 140 Maintenance: Preventative Maintenance Inspection Report Page Description Complete Actual Pass Fail 4-15 Patient-to-Line leakage for US 50mA) < 4-15 Patient-to-Ground leakage for US2 50mA) < 4-15 Patient-to-Line leakage for US2 50mA) < 4-16 Ground Continuity Functional Checkout Tests Description Page Complete Actual Pass...

  • Page 141: Comments

    Maintenance: Preventative Maintenance Inspection Report Comments: Revision D 250 Series Maternal/Fetal Monitor 4-61 2020551-001...
  • Page 142 Maintenance: Preventative Maintenance Inspection Report 4-62 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 143: Troubleshooting

    Troubleshooting Revision D 250 Series Maternal/Fetal Monitor 2020551-001...
  • Page 144 For your notes 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 145: Diagnostic Tests

    The first errors indicate problems on the Main Motherboard. The last error indicates a problem on the DSP Board. If the monitor displays any of these messages, turn off the monitor and contact your GE Service Representative. Monitor Self-Test The 250 Series Monitor contains self-test routines which verify the unit’s calibration and internal circuitry.
  • Page 146 Troubleshooting: Error Log Screen The Data column lists other information associated with the error code. This column is for factory use only. Error Log Error Log Count Data Print Clear Page Exit Error Log Screen To use the Error Log screen: Select the Service softkey from the General Setup screen.

  • Page 147: Diagnostic Control Screen

    Troubleshooting: Diagnostic Control Screen Diagnostic Control Screen The Diagnostic Control screen, as shown below, is used to perform the following diagnostic self-tests: Recorder Calibration test; Status Relay softkey tests Nurse Call Interface relay; CPU software version number; DSP software version number; Monitor Run Time;...

  • Page 148: Recorder Calibration Test

    Troubleshooting: Diagnostic Control Screen Recorder Calibration Test This test provides a method of testing the recorder calibration alignments. Use the Trim Knob control to set the recorder calibration field on the Diagnostic Control service mode screen to On. The recorder prints four continuous horizontal lines at 0 mmHg, 30 bpm, and 240 bpm and the minimum and maximum rates on the HR scale (30 bpm and 240 bpm for domestic paper, 50 bpm and 210 bpm for international paper).

  • Page 149: Run Time

    Troubleshooting: Diagnostic Control Screen Run Time This field displays the amount of time the monitor has been turned on—since the field was cleared. The time is displayed in hours, minutes, and seconds. To clear this field (reset the timer), activate the Clear softkey to the right of the run time field. NOTE: The Clear softkey also resets the recorder time field.
  • Page 150 Servicing of any recorder parts, other than the five subassemblies outlined above, should be referred to the nearest GE Service Representative. Stepper Motor and Harness Prior to removing/replacing the stepper motor, follow all instructions in the section, “Removing the Strip Chart Recorder”...
  • Page 151 Troubleshooting: Diagnostic Control Screen Replacing the Stepper Motor Slide new stepper motor into place. Replace the two screws which attach the motor to the frame. Re-connect the stepper motor harness cable to the Recorder Board at J4. Printhead Adjustments Refer to “Recorder Top View”...
  • Page 152 Troubleshooting: Diagnostic Control Screen Loosen the four hex-head lock screws—two on each side. The right side screws are labeled B in the figure on page 5-12. To move the printhead forward on one side, back-off the corresponding captive screw (turn counterclockwise) from its alignment block. To move the printhead backward on one side, tighten the corresponding captive screw (turn clockwise).
  • Page 153 Troubleshooting: Diagnostic Control Screen Open the recorder door. Support the printhead by reaching in through the recorder door, then remove the two screws on top of the printhead. Pull the printhead down and out through the recorder door with the harness still attached.
  • Page 154 Troubleshooting: Diagnostic Control Screen Recorder Top View Recorder Right Side View 5-12 250 Series Maternal/Fetal Monitor Revision D 2020551-001...
  • Page 155 Although these two reflective-sensors may be replaced in the field, tight tolerance repositioning is required to ensure that the sensors function properly. Therefore, it is recommended that the photosensors be replaced by a GE Service Representative. If the replacement is done locally, it must be done according to the following procedure.
  • Page 156 Troubleshooting: Diagnostic Control Screen Using an allen wrench, remove the two socket-head screws which attach the black sensor housing to the angle bracket. Discard the sensor and housing. Replacing the Paper-Low/Paper-Out Photosensor Use the following procedure for replacing the paper-low or paper-out photosensor: Attach the sensor and housing to the printhead support bracket using the two socket-head screws.
  • Page 157 Troubleshooting: Diagnostic Control Screen NOTE: Ensure that there is enough slack in the cable so that when the recorder door is opened the cable does not become taut. Re-install the strip chart recorder. Refer to “Installing the Strip Chart Recorder” on page 5-7.

  • Page 158: Faqs

    Troubleshooting: FAQs FAQs Question Answer NOTE: When the monitor is powered off, then on again, the settings revert back to the factory default settings or can be saved if you choose Store Current to Hospital in the password-protected Install Options Screen 2. To save your changes and exit the service mode: 1.
  • Page 159 Troubleshooting: FAQs Question Answer How do I change the alarm limits for Fetal 1. Rotate the Trim Knob to highlight the field for FHR1. (This field is at the top left on the Heart Rate 1? display, and it may read INOP, FECG, US, or US2. 2.
  • Page 160 Troubleshooting: FAQs Question Answer How do I change the alarm limits for Non- 1. Rotate the Trim Knob to highlight the field for NIBP. (This field is slightly above Invasive Blood Pressure? center, on the left side of the display. 2.
  • Page 161 Troubleshooting: FAQs Question Answer How do I enable the MHR/P, Maternal 1. Rotate the Trim Knob to highlight the field for MHR/P. (This field is located Heart Rate Pulse, trend recorder tracing? approximately in the center of the display, and may indicate MECG, Pulse or INOP, according on the settings that are currently enabled.
  • Page 162 Troubleshooting: FAQs Question Answer How do I change the scale of the MSpO 1. Rotate the Trim Knob to highlight the Setup softkey at the bottom of the screen. 2. Once Setup is highlighted press the Trim Knob. Press the Trim Knob. Maternal Blood Oxygen Saturation, trend 3.
  • Page 163 Troubleshooting: FAQs Question Answer How do I change the waveform parameter 1. Rotate the Trim Knob to highlight the waveform selection item. (This field is slightly being displayed? above the bottom menu bar, to the far left of the display, and should indicate one of the following: Off, MECG, MSpO , or FECG.) 2.
  • Page 164 Troubleshooting: FAQs Question Answer How do I change the waveform vertical 1. To change the waveform scale, the current selected waveform must be MECG or scale on the display? FECG. The waveform scale cannot be altered when you view MSpO plethsysmograph waveforms which auto-scale.
  • Page 165 Troubleshooting: FAQs Question Answer How do I enable and change the alarm 1. Rotate the Trim Knob to highlight the field for FHR1. (This field is top left on the volume settings for Fetal Heart Rate 1? display, and it may read INOP, FECG, US, or US2.) 2.
  • Page 166 Troubleshooting: FAQs Question Answer How do I enable or change alarm volume 1. Rotate the Trim Knob to highlight the field for NIBP. (This field is slightly above settings for Non-Invasive Blood Pressure? center, on the left side of the display.) 2.
  • Page 167 Troubleshooting: FAQs Question Answer How do I change the Volume for FHR1 Option 1 audio or heart beat tones? 1. Use the front panel Volume Up or Volume Down buttons (left) to control volume for FHR Channel 1. Option 2 1.
  • Page 168 Troubleshooting: FAQs Question Answer How do I change the volume for MHR 1. Rotate the Trim Knob to highlight the field for MHR/P. (This field is located near the Pulse tones? center of the display, and may indicate MECG, Pulse or INOP, depending on the settings that are currently enabled.
  • Page 169 Troubleshooting: FAQs Question Answer How do I access the service setup / install 1. Rotate the Trim Knob to highlight the Setup softkey at the bottom of the display, options screens? below the menu bar. 2. Once the Setup softkey is highlighted, press the Trim Knob. 3.
  • Page 170 Troubleshooting: FAQs J109 J110 J111 115 X/R 115 X/R 115 X/R Loopback (test) Loopback (test) Loopback (test) Critikon Critikon Critikon 1371 (HP) 1371 (HP) 1371 (HP) 1371 Notes (HP) 1371 Notes (HP) 1371 Notes (HP) Nellcor Factory (test only) Nellcor Question Answer 13.
  • Page 171 Troubleshooting: FAQs Question Answer How do I enable/disable Smart BP? 1. Enter Install Options Screen 1. (Refer to, “How do I access the service setup / install options screens?” on page 5-27). 2. In Install Options Screen 1, rotate the Trim Knob to highlight the Smart BP: setting. 3.
  • Page 172 Troubleshooting: FAQs Question Answer How do I change the default 1. Enter Install Options Screen 2. (Refer to “How do I access the service setup / install tocodynamometer reference value? options screens?” on page 5-27.) 2. In Install Options Screen 2, rotate the Trim Knob to highlight the Default TOCO Reference: setting on the eighth line from the top (excluding the Title).
  • Page 173 Troubleshooting: FAQs Question Answer How do I change the Recorder Paper 1. Enter the Install Options Screen 1. Speed? 2. Rotate the Trim Knob to highlight the Paper Speed: setting in the Recorder Setup section of the General Setup screen (center section of the display). 3.
  • Page 174 Troubleshooting: FAQs Question Answer How do I enable/disable Fetal Alarms 1. Enter the Install Options Screen 2. (“How do I access the service setup / install (tachycardia, bradycardia) or Spectra options screens?” on page 5-27). Alerts? 2. In Install Options Screen 2, rotate the Trim Knob to highlight the Fetal Alert/Alarm: setting.
  • Page 175 Troubleshooting: FAQs Question Answer How do I perform the recorder calibration 1. Enter Install Options Screen 1. (“How do I access the service setup / install options test? screens?” on page 5-27.) 2. In Install Options Screen 1, rotate the Trim Knob to highlight the Tests softkey at the bottom of the display, below the menu bar.
  • Page 176 Troubleshooting: FAQs Question Answer How do I test the RS232 outputs? 1. The 250 Series Monitor Serial Interface is capable of being tested by means of a loop back connector. A loop back connector simply routes the TX line from the serial port to the RX line of the same serial port.
  • Page 177 Troubleshooting: FAQs Question Answer How can I see all the current settings for 1. Enter the Install Options Screen 1. (“How do I access the service setup / install my monitor? options screens?” on page 5-27.) 2. In the Install Options Screen 1, rotate the Trim Knob to highlight the PrintAll softkey at the bottom of the display, below the menu bar.
  • Page 178 Troubleshooting: FAQs Question Answer How do I check the settings of the Main 1. Enter the Install Options Screen 1. (“How do I access the service setup / install CPU Board dip switch SW1 without options screens?” on page 5-27.) opening the unit? 2.

  • Page 179: System Troubleshooting

    Troubleshooting: System Troubleshooting System Troubleshooting The following Section will aid in the troubleshooting and repair of your monitor. Each of the following sub-sections begins with a general fault description, followed by a list of possible causes and debugging hints. Before looking through the listed problems, attempt to verify the reported problem.
  • Page 180 Troubleshooting: System Troubleshooting 250 SERIES SERVICE & TROUBLE SHOOTING PROBLEM SUBASSEMBLY COMMENTS SYSTEM POWER SUPPLY FRONT-END MOTHERBOARD Passes all front-end signals. Make sure boards seated and no connector damage exists. ULTRASOUND BOARD Can affect ultrasound audio only if US board is ISOLATED POWER SUPPLY By affecting ECG - does not affect ultrasound UI KEYPAD BOARD...
  • Page 181 Troubleshooting: System Troubleshooting 250 SERIES SERVICE & TROUBLE SHOOTING PROBLEM SUBASSEMBLY COMMENTS TRANSDUCER COMM BOARD WITH I/O Sits on same data bus as DSP/Display board CONNECTORS Secondary failure due to overheating only MECG ISOLATED POWER SUPPLY MECG BOARD DSP BOARD Processes MECG analog MECG FRONT-END CABLE &...
  • Page 182 Troubleshooting: System Troubleshooting 250 SERIES SERVICE & TROUBLE SHOOTING PROBLEM SUBASSEMBLY COMMENTS NIBP MAIN BOARD Contains NIBP processor and sensors PNEUMATICS BOARD (PUMP & Holds Pump, valves, hoses VALVES) HOSES To front panel, Pneumatics to main SYSTEM POWER SUPPLY DSP TO UI KEYPAD CABLE Could affect NIBP Start/Stop button UI KEYPAD BOARD Would affect all buttons on front panel...
  • Page 183 Troubleshooting: System Troubleshooting 250 SERIES SERVICE & TROUBLE SHOOTING PROBLEM SUBASSEMBLY COMMENTS COMM MAIN BOARD Generates all external comm COMM BOARD WITH I/O CONNECTORS SYSTEM POWER SUPPLY DSP BOARD Sits on the same data bus from main board Secondary failure due to overheating only PRINTING RECORDER BOARD Receives data from main board...
  • Page 184 Troubleshooting: System Troubleshooting 250 SERIES SERVICE & TROUBLE SHOOTING PROBLEM SUBASSEMBLY COMMENTS PRINTHEAD Misalignment causing drag DSP BOARD Front panel keypad routed through DSP board Secondary failure due to overheating only VOLUME CONTROLS UI KEYPAD BOARD Would affect all buttons on front panel MAIN BOARD Communicates with keypad VOLUME KEYPAD...
  • Page 185 Troubleshooting: System Troubleshooting 250 SERIES SERVICE & TROUBLE SHOOTING PROBLEM SUBASSEMBLY COMMENTS Secondary failure due to overheating only TOCO OR STRAIN GAUGE Try another transducer TRANSDUCER TEST FUNCTION DSP TO UI KEYPAD CABLE Affects all front panel functions UI KEYPAD BOARD Would affect all buttons on front panel PRINTHEAD Should print test pattern...
  • Page 186 Troubleshooting: System Troubleshooting 250 SERIES SERVICE & TROUBLE SHOOTING PROBLEM SUBASSEMBLY COMMENTS SYSTEM POWER SUPPLY MAIN BOARD Communicates with Keypad DSP BOARD Front Panel Keypad signals routed through DSP Secondary cause from overheating NIBP START/STOP HOSES To front panel, Pneumatics to main (blank) Would affect all buttons on front panel Could affect NIBP Start/Stop button...
  • Page 187 Troubleshooting: System Troubleshooting 250 SERIES SERVICE & TROUBLE SHOOTING PROBLEM SUBASSEMBLY COMMENTS POWER ON LINE CORD SYSTEM POWER SUPPLY POWER SWITCH CABLE Bad contacts in connector or to switch POWER SWITCH MAIN BOARD Short circuit RECORDER BOARD VHead Loading Power Supply Secondary failure due to overheating only.

  • Page 188: General Troubleshooting

    Troubleshooting: General Troubleshooting General Troubleshooting Table 22. General Troubleshooting Problem Probable Cause Possible Solution No monitoring functions and green Power Monitor is not connected to an AC line Connect the power cord to an AC line indicator does not illuminate when Power connector.

  • Page 189: Ultrasound Troubleshooting

    Troubleshooting: General Troubleshooting Ultrasound Troubleshooting Table 23. Ultrasound Troubleshooting Problem Probable Cause Possible Solution Ultrasound not functioning properly. Transducer not properly connected to Ensure that transducer is securely monitor. attached to monitor. Transducer placement. Wait before moving transducer; FHR often returns. Reposition transducer. Too little gel applied to transducer.

  • Page 190: External Uterine Activity Troubleshooting

    Troubleshooting: General Troubleshooting External Uterine Activity Troubleshooting Table 25. External UA Troubleshooting Problem Probable Cause Possible Solution Tocotransducer not recording contractions. Transducer not properly connected to Ensure that transducer is securely monitor. attached to monitor. Transducer not properly placed. Reposition transducer. Transducer not secured to patient.

  • Page 191: Internal Ua Troubleshooting

    Troubleshooting: General Troubleshooting Internal UA Troubleshooting Table 26. Internal UA Troubleshooting Problem Probable Cause Possible Solution Internal pressure not measuring correctly. Transducer not properly connected to Ensure transducer is securely attached monitor. to monitor. Air bubble in dome; or catheter blocked. Flush dome and catheter.

  • Page 192: Blood Pressure Troubleshooting

    Troubleshooting: General Troubleshooting Blood Pressure Troubleshooting Table 28. Blood Pressure Troubleshooting Problem Probable Cause Possible Solution High reading. Measurement taken during uterine Annotate chart, then take a manual contraction. reading in-between contractions. If possible, cancel reading during contraction. Enable the monitor’s Smart BP feature.

  • Page 193: Maternal Pulse Oximetry Troubleshooting

    Troubleshooting: General Troubleshooting Maternal Pulse Oximetry Troubleshooting Table 29. Maternal Pulse Oximetry Troubleshooting Problem Probable Cause Possible Solution COMM message shown in MSpO area of Communication error between the built- Contact Biomedical Engineering in MSpO module and the remainder of Department.
  • Page 194 Troubleshooting: General Troubleshooting 5-52 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 195: Parts List, Drawings, And Replacement

    Parts List, Drawings, and Replacement Revision D 250 Series Maternal/Fetal Monitor 2020551-001...
  • Page 196 For your notes 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 197: Ordering Parts

    This section of the manual provides parts lists for the 250 Series Monitor. Parts lists should be used in conjunction with the other chapters of this manual. GE makes every effort possible to provide the most up-to-date reference documentation for your equipment. However, in special cases involving field- installed upgrades, the revision level of a diagram or parts list in this manual may not reflect the revision level of your unit’s subassemblies.

  • Page 198: Field-Replaceable Units (Frus)

    Parts List, Drawings, and Replacement: Field-Replaceable Units (FRUs) Field-Replaceable Units (FRUs) FRU List The following table offers details of each of the corresponding bubble numbers that appear on the exploded engineering-assembly drawings (tri-folded drawings at the end of this section). Serv.
  • Page 199 Parts List, Drawings, and Replacement: Field-Replaceable Units (FRUs) Serv. Manual Bubble Drawing Page Part Number Description Comments Number Number 2025177-022 Plastic Bezel w/cables DRU Depot repair only, do not ship to FE. Customers out of warranty may purchase 2025177-023 Keypad/Volume Pad FRU 2025177-026 Trim Knob and Switch 2025177-017...

  • Page 200: Fru Main Reference Guide Drawing

    Parts List, Drawings, and Replacement: Field-Replaceable Units (FRUs) FRU Main Reference Guide Drawing For quick reference use the following FRU Main Reference Guide drawing. The numbers in the bubbles coincide with the last three digits of the part number listed in the FRU list (e.g., -020 represents FRU P/N 2025177-020).
  • Page 201 Parts List, Drawings, and Replacement: Field-Replaceable Units (FRUs) -009 -008 -029 SpO 2 Carrier Bd. w/Nellcor -010 SpO 2 Carrier Bd. w/Masimo -011 SpO 2 Carrier Bd. w/Datex -012 -007 Revision D 250 Series Maternal/Fetal Monitor 2020551-001...

  • Page 202: Assembly/Disassembly Of Frus

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs Assembly/Disassembly of FRUs 2025177-003 Speaker Remove top cover. Keep screws aside. Disconnect speaker cable from Main board connector J10. Remove nuts and flat washers fixing Speaker to mounting posts. Keep nuts and washers aside.

  • Page 203: 2025177-005 Dsp Board

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 18. Connect speaker cable to Main board connector J10. 19. Place Comm. board onto Main board. 20. Fasten Comm. board onto chassis with four screws. 21. Connect power supply cable to Main board connector J8. 22.

  • Page 204: 2025177-007 Dual Ultrasound Board

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs Disconnect power-switch cable from front-bezel power-switch chassis-mounted connector. Remove cable-tie mount from side of chassis. Disconnect Power Supply cable from J1 connector on Recorder board. Disconnect Power Supply cable from J8 connector on Main board. Remove three flat-head screws from side of Power Supply.

  • Page 205: 2025177-008 Fecg/Ua Board

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 12. Connect 8-conductor Inverter cable to DSP board connector J1. 13. Connect 20-conductor DSP-to-LCD Decoder ribbon cable to DSP board connector J2. 14. Place DSP board onto Main board. Use two screws to fasten DSP board to chassis.

  • Page 206: 2025177-010 Spo2 Carrier Board With Nellcor Mspo2 Module

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs Remove card cage cover. Keep screws aside. Remove Isolated Power Supply board from Front-end Motherboard. Insert new Isolated Power Supply board into Front-End Motherboard. Replace card cage cover. Re-insert screws. 10. Reconnect 8-conductor Inverter cable to DSP board connector J1. 11.

  • Page 207: 2025177-012 Spo2 Carrier Board With Trusignal Mspo2 Module

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs Disconnect 20-conductor DSP-to-LCD Decoder ribbon cable from DSP board connector J2. Remove card cage cover. Keep screws aside. Disconnect MSpO cable from SpO Carrier board connector. Remove SpO Carrier board with Masimo MSpO Module assembly from Front-end Motherboard.

  • Page 208: 2025177-013 Front-End Motherboard

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 2025177-013 Front-end Motherboard Remove top cover. Keep screws aside. Remove two screws fastening DSP board to chassis. Remove DSP board from board. Disconnect 8-conductor Inverter cable from DSP board connector J1. Disconnect 20-conductor DSP-to-LCD Decoder ribbon cable from DSP board connector J2.

  • Page 209: 2025177-014 Chassis

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 34. Connect MECG cable to MECG board connector. 35. Insert SpO Carrier board assembly onto Front-end Motherboard. 36. Connect MSpO cable to SpO Carrier board connector. 37. Insert Ultrasound board onto Front-end Motherboard. 38.
  • Page 210 Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 20. Pull red tubes through chassis grommet away from Front-bezel. 21. Disconnect orange connector receptacle of power switch cable assembly from orange chassis-mounted plug. 22. Remove front bezel from chassis tabs. 23. Remove Ultrasound board from Front-end Motherboard. Remove SpO Carrier board assembly from Front-end Motherboard.
  • Page 211 Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 55. Fasten four pan-head screws into back of Power Supply. 56. Fasten one pan-head screw into inside bottom of Power Supply. 57. Insert power supply power-switch connector into chassis. 58. Adhere new cable tie mount to side of chassis. 59.

  • Page 212: 2025177-016 Comm Board

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 89. Insert MSpO cable beads into chassis bead clips. 90. Connect MECG cable to MECG board connector. 91. Connect MSpO cable to SpO Carrier board connector. 92. Connect Ultrasound cables to Ultrasound board connectors. The left- most Ultrasound connector US1 cable goes to the rear connector on Ultrasound board, J5.

  • Page 213: 2025177-018 Recorder Board

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 10. Disconnect 20-conductor Recorder ribbon cable from Recorder board connector 11. Disconnect power supply cable from J1 connector on Recorder board. 12. Disconnect Recorder EMC ground wire Fast-on connector from chassis tab. 13.
  • Page 214 Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs Remove DSP board from Main board. Disconnect 10-conductor DSP-to-Keypad ribbon cable from DSP board connector J5. Disconnect 20-conductor Recorder ribbon cable from Recorder board connector Disconnect power supply cable from J1 connector on Recorder board. Disconnect Recorder EMC ground wire Fast-on connector from chassis tab.

  • Page 215: 2025177-019 Cables

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 2025177-019 Cables Remove top cover. Keep screws aside. Remove two screws fastening DSP board to chassis. Remove DSP board from Main board. Disconnect 8-conductor Inverter cable from DSP board connector J1. Disconnect 20-conductor DSP-to-LCD Decoder ribbon cable from DSP board connector J2.

  • Page 216: 2025177-020 Pneumatics Assembly

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 25. Connect 8-conductor Inverter cable to DSP board connector J1. 26. Slide-on top cover. Re-insert screws. 2025177-020 Pneumatics Assembly Remove top cover. Keep screws aside. Remove two screws fastening DSP board to chassis. Remove DSP board from Main board.

  • Page 217: 2025177-021 Display Assembly

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 2025177-021 Display Assembly Remove top cover. Keep screws aside. Remove two screws fastening DSP board to chassis. Remove DSP board from Main board. Disconnect 8-conductor Inverter cable from DSP board connector J1. Disconnect 20-conductor DSP-to-LCD Decoder ribbon cable from DSP board connector J2.
  • Page 218 Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs Disconnect 8-conductor Inverter cable from DSP board connector J1. Disconnect 20-conductor DSP-to-LCD Decoder ribbon cable from DSP board connector J2. Disconnect 10-conductor DSP-to-Keypad ribbon cable from DSP board connector J5. Remove one flat-head screw from each side of the monitor fastening the front bezel to chassis.
  • Page 219 Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 36. Remove front bezel from chassis tabs. 37. Insert new front bezel into chassis tabs. 38. Push power switch in through front bezel. 39. Insert metal retaining clip into top and bottom bridges on power switch. Then push in tightly.

  • Page 220: 2025177-023 Keypads

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 2025177-023 Keypads Remove top cover. Keep screws aside. Remove two screws fastening DSP board to chassis. Remove DSP board from Main board. Disconnect 8-conductor Inverter cable from DSP board connector J1. Disconnect 20-conductor DSP-to-LCD Decoder ribbon cable from DSP board connector J2.

  • Page 221: 2025177-026 Trim Knob And Encoder

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 31. Connect 8-conductor Inverter cable to DSP board connector J1. 32. Place DSP board onto Main board. Use two screws to fasten DSP board to chassis. 33. Slide-on top cover. Re-insert screws. 2025177-026 Trim Knob and Encoder Remove top cover.

  • Page 222: 2025177-027 Power Switch Assembly

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 2025177-027 Power Switch Assembly Remove top cover. Keep screws aside. Remove two screws fastening DSP board to chassis. Remove DSP board from Main board. Disconnect 8-conductor Inverter cable from DSP board connector J1. Disconnect 20-conductor DSP-to-LCD Decoder ribbon cable from DSP board connector J2.
  • Page 223 Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs Disconnect 10-conductor DSP-to-Keypad ribbon cable from DSP board connector J5. Remove two screws fastening Pneumatics assembly to chassis. Remove clear section of tubing from E1 to PT1 on Main board. Remove clear section of tubing from E2 to PT2 on Main board. 10.

  • Page 224: 2025177-029 Mecg Board

    Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 36. Connect 20-conductor DSP-to-LCD Decoder ribbon cable to DSP board connector J2. 37. Connect 10-conductor DSP-to-Keypad ribbon cable to DSP board connector J5. 38. Place DSP board onto Main board. Use two screws to fasten DSP board to chassis.
  • Page 225 Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs CAUTION The top cover gasket protects the inside of the unit from fluid spills. Whenever the monitor cover is removed during servicing, be sure to inspect the gasket, ensuring it is attached securely across the whole front of the top cover along the stamping line (just in from the edge).
  • Page 226 Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs 6-32 250 Series Maternal/Fetal Monitor Revision D 2020551-001...
  • Page 227 Technical Specifications This section contains a detailed list of the technical specifications for the 250 Series Monitor. Revision D 250 Series Maternal/Fetal Monitor 2020551-001...

  • Page 228: Technical Specifications

    Technical Specifications For your notes 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 229: General Monitor

    Technical Specifications General Monitor General Monitor Table 1. General Monitor Technical Specifications Category Technical Specifications Power Requirements Nominal Line Voltage: 100VAC 120 VAC 220 VAC 230 VAC 240 VAC Line Frequency: 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz 50/60 Hz Power Consumption (maximum): 100 W 100 W...

  • Page 230: Operating Modes

    Technical Specifications Operating Modes Operating Modes Table 2. Operating Mode Specifications CAUTION The monitor may produce incorrect results if operated outside the minimum specified parameter specifications in this table. FECG Mode Technique: Peak detecting, beat-to-beat cardiotachometer Heart Rate Counting Range: 30–240 bpm Heart Rate Resolution: ±...
  • Page 231 Technical Specifications Operating Modes Table 2. Operating Mode Specifications (Continued) MECG Mode Technique: Peak detecting, beat-to-beat cardiotachometer Maternal ECG Electrode Type: Medtronic 1700-003 or equivalent Leads Available: I, II, and III Heart Rate Counting Range: 30–240 bpm Heart Rate Resolution: ±...
  • Page 232 The 250 Series blood pressure parameter complies with the American Compliance: National Standard for Electronic or Automated Sphygmomanometers [AAMI/ANSI SP10-1992]. The GE monitor values are based on the oscillometric method of noninvasive blood pressure measurement and correspond to comparisons with intra-aortic values within ANSI/AAMI Standards for accuracy.
  • Page 233 Technical Specifications Operating Modes Table 2. Operating Mode Specifications (Continued) Maternal Pulse Oximetry Mode (Masimo) Technique: Spectrophotometry and plethysmography. Sensor Accuracy Sensor Model LNOP DC-I, LNOP-Adt, LNCS PC-I, and LNCS-Adt ® Weight Range > 30 kg Saturation No Motion ± 2% Accuracy Motion ±...
  • Page 234 Technical Specifications Operating Modes Table 2. Operating Mode Specifications (Continued) Maternal Pulse Oximetry Mode (Masimo continued) Accuracy specified when used with Masimo SET pulse oximetry modules using PC or LNC series patient cables. Numbers represent ± 1 standard deviation.Plus or minus one standard deviation represents 68% of the population.SpO accuracy from 70% to 100%.Pulse Rate accuracy from 25 to 240 bpm.
  • Page 235 Technical Specifications Operating Modes Table 2. Operating Mode Specifications (Continued) Maternal Pulse Oximetry Mode (Ohmeda) Technique: Spectrophotometry and plethysmography Sensor Type OxiTip+ OXY-AP and OxiTip+ OXY-F Pulse Rate Accuracy: 30-250 bpm; ± 2 digits or ± 2%, whichever is greater (no motion) 30-250 bpm;...
  • Page 236 Technical Specifications Operating Modes Table 2. Operating Mode Specifications (Continued) Maternal Pulse Oximetry Mode (Nellcor) Technique: Spectrophotometry and plethysmography. Sensor Type and Accuracy Range: 70%–100%: OxiMax ® Sensor Models ± 2 digits MAX-A DS-100A ± 3 digits Saturation Range: 1–100% Pulse Rate Range: 30–250 bpm Accuracy:...

  • Page 237: Strip Chart Recorder

    Technical Specifications Strip Chart Recorder Strip Chart Recorder Table 3. Strip Chart Recorder Technical Specifications Heart Rate Scale Domestic International Chart Width: 7 cm 8 cm Scaling: 30 bpm/cm 20 bpm/cm Range: 30–240 bpm 50–210 bpm Resolution: 1 bpm 1 bpm Uterine Activity Scale Strain Gauge Tocotransducer...
  • Page 238 Technical Specifications Strip Chart Recorder A-12 250 Series Maternal/Fetal Monitor Revision D 2020551-001...
  • Page 239 Alarms Summary Revision D 250 Series Maternal/Fetal Monitor 2020551-001...

  • Page 240: Alarms Summary

    Alarms Summary: For your notes 250 Series Maternal/Fetal Monitor Revision D 2020551-001...
  • Page 241 Alarms Summary: Table B-1. Summary of 250 Series Alarms Type Condition Visible Advisory Audible Advisory An alarm setting (audio or high/low — displays to the left of the limit) is turned off. FHR mode title. Alarm Defaults Audio: on Volume: 5 Limits: High = 160 bpm, Low = 120 FHR limit (high or low) actively being FHR numeric flashes.
  • Page 242 Alarms Summary: Table B-1. Summary of 250 Series Alarms Type Condition Visible Advisory Audible Advisory Alarm Defaults — Audio: on Volume: 5 Limits: High = 120 bpm, Low = 50 Re-alarm: 120 sec MHR/P limit (high or low) actively MHR/P numeric flashes. Alternating high/low tones (if being violated.
  • Page 243 Electromagnetic Compatibility Revision D 250 Series Maternal/Fetal Monitor 2020551-001...
  • Page 244 Electromagnetic Compatibility: For your notes 250 Series Maternal/Fetal Monitor Revision D 2020551-001...

  • Page 245: Electromagnetic Compatibility

    Guidance and Manufacturer’s Declaration – Electromagnetic Emissions The Corometrics 250 Series Maternal/Fetal Monitor is intended for use in the electromagnetic environment specified below. It is the responsibility of the customer or user to assure that the 250 Series Maternal/Fetal Monitor is used in such an environment.

  • Page 246: Guidance And Manufacturer's Declaration - Electromagnetic Immunity

    Electromagnetic Compatibility: Electromagnetic Compatibility (EMC) Guidance and Manufacturer’s Declaration – Electromagnetic Immunity The 250 Series Maternal/Fetal Monitor is intended for use in the electromagnetic environment specified below. It is the responsibility of the customer or user to assure that the 250 Series Maternal/Fetal Monitor is used in such an environment. Immunity Test EN 60601 Test Level Compliance Level...
  • Page 247 Electromagnetic Compatibility: Electromagnetic Compatibility (EMC) Guidance and Manufacturer’s Declaration – Electromagnetic Immunity The 250 Series Maternal/Fetal Monitor is intended for use in the electromagnetic environment specified below. It is the responsibility of the customer or user to assure that the 250 Series Maternal/Fetal Monitor is used in such an environment. Immunity Test EN 60601 Test Level Compliance Level...

  • Page 248: Recommended Separation Distances

    Electromagnetic Compatibility: Electromagnetic Compatibility (EMC) Recommended Separation Distances The table below provides the recommended separation distances (in meters) between portable and mobile RF communications equipment and the 250 Series Maternal/Fetal Monitor. The 250 Series Maternal/Fetal Monitor is intended for use in the electromagnetic environment on which radiated RF disturbances are controlled.

  • Page 249: Compliant Cables And Accessories

    The table below lists cables, transducers, and other applicable accessories with which GE Medical Systems claims EMC compliance. NOTE: Any supplied accessories that do not affect EMC compliance are not included.
  • Page 250 Electromagnetic Compatibility: Electromagnetic Compatibility (EMC) Part No Description Maximum Lengths 2023597-001 MASIMO SET adult reusable finger sensor 2025350-001 Nellcor MSpO INTERMED CABLE, 120 SERIES 170053 Nellcor OXYGEN XDCRS TOCO Cables 2264HAX Nautilus Tocotransducer Cable, Loop Style 2.4 m / 8 ft 2264LAX Nautilus Tocotransducer Cable, Button Style 3 m / 10 ft...
  • Page 252 Tel: + 86 21 5257 4650 Fax:+ 1 414 355 3790 Fax: + 49 761 45 43 - 233 Fax: + 86 21 5208 2008 GE Medical Systems Information Technologies, a General Electric Company, going to market as GE Healthcare www.gehealthcare.com 0086...

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