XS series operating manual
XS user manual v0.55 - 22 -
3 Megohmmeter function (insulation resistance
measurement)
500V megohmmeter function
(MXS500,DXS50/56,DXS500/506,SXS50/56,SXS500/506)
Measurement voltage
Voltage adjustable from 10V to 500VDC by 1 volt step.
Accuracy : ±(1% + 1V).
Positive pole of the HV generator is grounded ( earth)
Dynamic stability for a mains V = ±10% : >1%.
The maximum current in the measurement circuit is : 2 mA ±20%.
The discharge current is limited by a 2.2 k resistor.
Measurement range
Display : 2000 digits
The measurement range is defined by the following formula :
(Utest / Umax generator ) x 200 G*
* or 2T according to the option
This gives the following board for the 50,100, 250, 500VDC standard voltages
Measurement accuracy
2000 digits numeric display with unity indication (K, M, G,T).
Accuracy (% of the reading, 1U = 1 digit ) :
2 T option and U<=200VDC
2 T option and U > 200VDC
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