GE Corometrics 126 - User Manual

Questions and Answers

D
Donald BruceAug 14, 2025
What to do if GE Corometrics 126 ultrasound is not functioning properly?
- T
  Terry BrownAug 15, 2025
  If the ultrasound on your GE Medical Equipment isn't working right, first make sure the transducer is securely connected to the monitor. Wait a moment and then try repositioning the transducer. Apply more gel to the transducer. If problems persist, replace the transducer. If there is no signal, auscultate FHR. If the patient is an active fetus or mother, or has fetal arrhythmia or hiccups, or extreme maternal obesity, use an alternate technique.
D
Daniel MejiaAug 18, 2025
Why is my GE Medical Equipment not recording contractions?
- J
  Joshua NorrisAug 18, 2025
  If the tocotransducer on your GE Medical Equipment isn't recording contractions, check that the transducer is securely attached to the monitor and properly placed on the patient. Ensure it's also properly secured to the patient. If the issue persists, replace the transducer/cable assembly. Also, be sure that the UA Reference range has not been exceeded. To fix this, loosen the belts or remove the transducer from the patient, press the UA Reference pushbutton while there is no pressure applied to the transducer button, re-apply the transducer, and do not overtighten the belt. Press the UA Reference pushbutton again between contractions.
R
Robin CoxAug 21, 2025
What to do if GE Medical Equipment FSpO values change rapidly?
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  Kelly LopezAug 21, 2025
  If the FSpO values on your GE Medical Equipment are changing rapidly and the pulse amplitude indicator is erratic, check the fetus for other signs of distress. If possible, keep the patient still, as excessive movement may interfere with the monitor's ability to find a pulse. Check whether the sensor is positioned properly, and reposition it if necessary. Also, verify that the FAST mode is selected in the FSpO2 Setup screen. Ensure that there is no interference from other hospital devices, especially electrosurgical units (ESU).
T
Thomas WallaceAug 25, 2025
How to fix static noise on ultrasound in GE Medical Equipment?
- M
  michellelevyAug 25, 2025
  To fix static noise on the ultrasound of your GE Medical Equipment, reposition the transducer if the fetus is active. Ensure that sheets and gowns are not touching the transducer, and avoid holding the transducer with your hand to minimize environmental noise. If the mother is moving, switch to an alternate monitoring mode. If the problem persists, the transducer may be defective and require replacement.
J
Julian SpencerAug 28, 2025
What to do if GE Corometrics 126 shows CHECK TOCO message?
- Z
  Zachary TurnerAug 28, 2025
  If your GE Medical Equipment displays a 'CHECK TOCO' message when the UA Reference pushbutton is pressed, wait ten seconds after powering on the monitor or connecting to the UA connector before pressing the UA Reference pushbutton. Also, this message can appear if the UA Reference range has been exceeded due to overtightening of the belt. To resolve this, loosen the belts or remove the transducer from the patient. Press the UA Reference pushbutton while no pressure is applied to the transducer button. Re-apply the transducer, being careful not to overtighten the belt. Press the UA Reference pushbutton again between contractions. If the issue continues, the transducer may be defective and require replacement.
P
Philip SmithAug 31, 2025
Why GE Corometrics 126 has no heartbeat or pulse sounds?
- E
  emartinAug 31, 2025
  If you're not hearing heartbeat or pulse sounds on your GE Medical Equipment, first check the volume. Use the Volume pushbuttons or access the FECG, US, or US2 setup screen to increase the volume. Also, make sure that each transducer is securely attached to the monitor and correctly applied to the patient.
C
Christine WaltersSep 4, 2025
How to correct the time and date on GE Corometrics 126 Medical Equipment?
- D
  Deborah CrawfordSep 4, 2025
  To correct the time and date on your GE Medical Equipment, access the General Setup screen and reset the time and date.
T
torresannetteSep 7, 2025
What to do if GE Corometrics 126 doesn't turn on?
- N
  Nicholas GilbertSep 7, 2025
  If your GE Medical Equipment isn't turning on, and the green power indicator isn't lit, first ensure the power cord is connected to both the monitor and a working AC outlet. Try a different outlet to rule out a defective outlet. If the issue persists, replace the power cord.
J
Jennifer GeorgeSep 12, 2025
Why is internal FECG erratic on GE Corometrics 126 Medical Equipment?
- S
  sriversSep 12, 2025
  If the internal FECG on your GE Medical Equipment is erratic or not recording properly, first ensure the transducer is securely attached to the monitor. Also, check that the attachment pad or legplate is securely attached to the patient and that the electrode wire is secure in the legplate post. Verify the ECG paste; re-apply if necessary. If problems persist, replace the electrode or attachment pad. If there is no FECG signal, auscultate FHR.

Summary

SERVICE MANUAL

Safety

Monitor Contraindications, Warnings, and Precautions

Details contraindications, warnings, cautions, and electromagnetic interference considerations for the monitor.

Theory of Operation

Main Motherboard

Explains the central processing unit and data flow handled by the main motherboard.

DSP Board

Details the digital signal processing section and its interface with the main processor.

NBP Board

Describes the theory of operation for the Non-Invasive Blood Pressure module.

System Power Supply

Details the design and operation of the monitor's power supply module.

Dual Ultrasound Board

Explains the dual channel pulsed Doppler ultrasound system operation.

UA;FECG Board

Details the circuitry for Uterine Activity and Fetal ECG monitoring.

MECG Board

Explains the theory of operation for Maternal ECG monitoring.

MSpO2 Board

Explains the theory of operation for Maternal Pulse Oximetry.

Isolated Power Supply Board

Recorder Board

Setup Procedures

Service Mode Screens

Functional Checkout Procedure

Self-Test Routine

Details the procedure for verifying the monitor's calibration and internal circuitry integrity.

MECG Test

Ultrasound Test

Alarm Test

Verifies the integrity of audio alarms and alarm limit software.

Preventative Maintenance Inspection Report

Calibration

Power Supply Voltages-Verification

Trimline Tocotransducer Calibration

Nautilus Tocotransducer Calibration

Self-Tests

Power-On Diagnostic Tests

Automatic tests performed by the Main Motherboard and DSP Board upon power-up.

Monitor Self-Test

Initiates test routines to verify unit calibration and internal circuitry integrity.

Error Log Screen

Diagnostic Control Screen

General Maintenance

Maternal Blood Pressure Tests

Electrical Safety Tests

Covers essential electrical safety tests including leakage and dielectric tests.

Upgrading a 120 Series Monitor

Software Version 3.5

Technical Specifications

General Monitor

Operating Modes

Replacement Parts

Replacement Parts Table

A comprehensive list of FRUs (Field Replacement Units) and their part numbers.

Calibration Parts

Troubleshooting

General Troubleshooting

Provides basic troubleshooting steps for common monitor operational problems.

Ultrasound Troubleshooting

FECG Troubleshooting

Fetal Pulse Oximetry Troubleshooting

Troubleshooting steps for issues with Fetal SpO2 readings and sensor connection.

Blood Pressure Troubleshooting

Addresses problems related to NBP readings, messages, and functionality.

Maternal Pulse Oximetry Troubleshooting

Troubleshooting steps for issues with Maternal SpO2 readings and communication.

Alarms Summary

Table of Alarms

Provides a summary of 120 Series alarms, including visible and audible advisories.

GE Corometrics 126 Specifications

General

Category	Fetal Monitor
Manufacturer	GE Healthcare
Model	Corometrics 126
Display	LCD
Power Source	AC Power
Fetal Heart Rate Range	50-210 bpm
Recorder Speed	1, 2, 3 cm/min
Type	Fetal Monitor
Ultrasound Frequency	1 MHz
TOCO Range	0-100 units