Operator's Manual

C-2
C.2 ECG Waveform Distortion Test
The function of the electrocardiograph will not be affected by
pacemaker, which can be verified by the following methods:
1. Superimpose the pulse wave with peak value of 200mV, rise
time of less than 100μs, pulse width of 1ms, repetition rate of
100 times / min and sine wave signal with peak valley value of
1mV and frequency of 40Hz, input them to the
electrocardiograph, and the time taken for the recorded sine
wave signal to return to 70% of the initial value (which should be
10mm when the peak valley value is 1mV and the sensitivity is
10mm/mV) should not be more than 50ms. In the above test,
the maximum baseline drift accumulated in 10s is less than
10mm. In the case of pulse and without pulse, the amplitude
difference of sine wave signal recording (record after the
waveform is stable) is no more than ±1mm.
2. To carry out distortion test, the filter of the electrocardiograph
must be turned on.