Iso-Tech IDM63N Manuel D'instruction page 9

2-3 Electrical Specifications
Accuracy is ± (% reading + number of digits) at 23°C ± 5°C less than 80% R.H.
(1) DC Volts
Range
300mV
3V
30V
300V
600V
Input Impedance : 10MΩ.
Resolution
100µV
1mV
±(0.5%reading + 2digits)
10mV
100mV
1V
Accuracy
8
Over voltage protection
600V DC or 600V rms