Calibration Verification; Calibrate Transducers - GE Corometrics 250 Series Service Manual

Calibration Verification

Calibrate Transducers

4-44
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.
1.
Select Tests.
2.
3. Select NIBP Cal.
The sequence of procedures for calibration of NIBP starts with Calibration
Verification. If Calibration Verification shows the NIBP transducers to be out of
calibration then calibration should be performed. Only after NIBP transducers have
been shown to be in calibration should any other test be performed. Both
Overpressure Detection and System Leakage should always be performed.
Select Verify from the Mode: option.
1.
2. The monitor will inflate the cuff to approximately 200 mmHg.
3. If either PT1 or PT2 pressure, from the external manometer, are
> = 2 mmHg (0.3 kPa) different from the monitor indicated pressure then
perform Calibrate Transducers procedure.
To stop Calibration Verification select Done, which appears after the Verify
4.
softkey has been pressed.
5. The monitor will vent pressure to atmosphere and re-zero the transducers.
1. Select Calibrate from the Mode: option.
2. The monitor will inflate the cuff to approximately 200 mmHg (26.7 kPa).
3. Once the pressure has stabilized, enter the pressure from the external
manometer in External:
4. Best accuracy is achieved if the system is given a short time to settle. Best
accuracy is achieved if the system pressure is at or near
200 mmHg (26.7 kPa).
5. Additional pressure can be inserted into the system using a hand bulb.
6. The monitor will vent pressure to atmosphere and re-zero the transducers.
7. Perform a Calibration Verification and repeat Calibration if new calibration
factors still show the transducers out of calibration
Commit the new calibration factors by selecting Store Calibration.
8.
NOTE: Between entering the external pressure and committing the new
calibration factors the Exit menu item will display as Exit – No Store to
indicate current calibration factors will be lost if Service Mode is
exited prior to selecting Store Calibration.
NOTE: The menu item Store Calibration will only display after Calibration
Verification has been performed during the Calibration procedure.
250 Series Maternal/Fetal Monitor
2020551-001
Revision D