Gossen Metrawatt Metrahit Iso Insulation measuring device, CAT III 600 V Metrahit Iso Benutzerhandbuch

38

GMC-I Gossen-Metrawatt GmbH

Measurements: V/Hz, 

Ω,  , Temp (°C/°F), 

, M

Ω

@UISO

, A/Hz

5.6

Capacitance Measurement 

 

➭ Disconnect supply power from the electrical circuit of the device 

to be measured, and discharge all high-voltage capacitors.

➭ Make sure that the device under test is voltage-free. 

Capacitors must always be discharged before measurement is 
performed. 
Interference voltages distort measurement results! 
Refer to section 5.1.1 regarding testing for the absence of 
voltage with the help of the direct voltage measurement.

➭ Set the rotary switch to “

”.

➭ Connect the (discharged!) device under test to the sockets 

with the measurement cables as shown.

Note



The “–” pole of polarized capacitors must be connected to the 
“

⊥” jack. 

Resistors and semiconductor paths connected in parallel to 
the capacitor distort measurement results!

COM mA A

V

Temp

Ω MΩ

ISO

COM mA A

V

Temp

Ω MΩ

ISO

10.38

F

+

–

+

–

μ

Measuring range: 10 pF to 300 

μF

5 ranges: 30 nF, 300 nF, 

3 

μF, 30 μF and 300 μF