My customer got problem when testing input impedance of AD8232.
Follow IEC60601-2-47 , see in attach file
The ECG test module generate 10Hz/5mV signal to device input.
And output can't be lower 94% (4.7mV).
Currently we got 4.1mV. (AD8232 output = 820mV , GAIN=200)
Do you have any suggestion in this issue?
We try to short Switch S1 and the we got around 4.9mV.
But in normal test, the S1 should OPEN.