5-4 TM80 Telemetry Monitor Service Manual
5.4.1.6 ECG Calibration
The ECG signal may be inaccurate due to hardware or software problems. As a result,
the ECG wave amplitude becomes greater or smaller.
Tool required:
Vernier caliper
1. In the main menu, select Parameter Setup.
2. Select ECG.
3. Set Filter to Monitor.
4. Return to the main menu and select Maintenance.
5. Input the maintenance passcode.
6. Tap Accept.
7. In the Maintenance menu, select General.
8. Enable Calibrate ECG.A square wave appears on the screen and the message
ECG Calibrating is displayed in the technical alarm area of the device’s screen.
Compare the amplitude of the square wave with the wave scale. The difference
should be within 5%.
9. After completing the verification, disable Calibrate ECG. If necessary, you can
print out the square wave and wave scale through the recorder and then
measure the difference.
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