GE Corometrics 250 Series Service Manual page 108

4-28
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
Elimination" on page 4-29.)
16. Repeat Step 15 for the rate value of
15 except that the FHR1 value alternates between 22 bpm and the recorder
prints an oscillation of 22 bpm between the 103 and 125 bpm on the strip chart
recorder paper.
17. Set the simulator's ECG Rate switch to the
on the monitor:
The FHR1 value oscillates by 27 bpm.
The FHR1 heartbeat indicator ( ) flashes for each input signal.
The ECG "beep" is heard from the rear panel speaker.
The recorder does not print any oscillation.
18. Access Install Options Screen 2 and set the FECG Artifact Elimination back to Off.
19. Set the simulator's ECG Rate switch to the MANUAL position and the Manual
Adjustment knob to the counterclockwise position. Disconnect the ECG
simulator cable from the monitor's y-adapter cable. Verify the following on the
monitor:
The FHR1 value and mode are both blank.
The recorder stops printing heart rate data on the strip chart paper.
The recorder prints the message CARDIO INOP on the center margin of the
strip chart paper after approximately 30 seconds.
Set the simulator's ECG Mode switch to the Off position.
250 Series Maternal/Fetal Monitor
2020551-001
"FECG Artifact
∆
22. The result should be the same as
∆
27 position. Verify the following
Step
FECG Ramp
Revision D