Operator's Manual

C-1
Appendix C Sensitivity Test and ECG Waveform
Distortion Test
C.1 Sensitivity Test
Testing device: Calibration Device for Electric Cardiac Monitor
Testing method:
1. Connect the tested electrocardiograph with the calibrator
through patient cable, and set the sensitivity of
electrocardiograph at 10mm/mV. The calibrator outputs a sine
wave signal with a peak value of 1mV and a frequency of 10Hz
to the tested electrocardiograph.
2. Adjust the sensitivity of the electrocardiograph, and adjust the
peak-peak value of the calibrator according to the set sensitivity,
input a sine wave signal with the frequency of 10Hz to make the
peak value of the waveform display theoretically be 10mm, and
confirm the peak-peak value displayed by lead I of the
electrocardiograph.
3. According to the methods in steps 1 and 2 above, change the
leads of the electrocardiograph in turn, and connect the output
signal of the calibrator to the corresponding lead of the
electrocardiograph to complete the test of all channels. Select
the test results with the largest relative deviation from the test
results of each test point as the verification result of this item.
Acceptance criteria: The measured calibration voltage is within 5%.
Test cycle: Test the sensitivity once a year according to the above
method.