Fecg Test - GE Corometrics 250 Series Service Manual

FECG Test

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Maintenance: 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"
1.
adapter cable.
2. Connect the simulator's UA cable to the UA connector on the monitor.
3. Set the switches on the Model 325 Input Simulator according to
If not already on, depress the monitor's Record button.
4.
Turn the simulator's Manual Adjustment knob counterclockwise and verify the
5.
following on the monitor's display:
The FECG value is 30 bpm.
The FECG mode is FECG.
The FECG heartbeat indicator ( ) flashes at a rate of 30 times per minute.
The UA mode is TOCO.
Depress and hold the monitor's UA Reference button and release when the UA value
6.
shows 10 relative units in mmHg mode or 1.3 kPa in kPa mode. Verify the following
on the monitor:
The UA value is referenced to 10 mmHg (1.3 kPa) on the display.
The recorder prints a continuous line at 10 mmHg (1.3 kPa) on the bottom
grid of the strip chart paper.
The recorder prints the messages UA REF on the strip chart paper.
Turn the simulator's Manual Adjustment knob to input an FECG signal of
7.
approximately 120 bpm. Verify the following on the monitor:
The FECG value is 120 bpm.
FECG heartbeat indicator ( ) flashes at a rate of 120 times per minute.
The ECG "beep" volume of the rear panel speaker can be increased or
decreased using the left pair of Volume buttons. (Set the volume to the
desired level.)
The recorder prints a continuous line at 120 bpm on the HR grid of the strip
chart paper.
250 Series Maternal/Fetal Monitor
2020551-001
Table 9.
Revision D