Gossen Metrawatt Metrahit Iso Insulation measuring device, CAT III 600 V Metrahit Iso Manual De Usuario

32

GMC-I Gossen-Metrawatt GmbH

Measurements: V/Hz, 

Ω,  , Temp (°C/°F), 

, M

Ω

@UISO

, A/Hz

5.2

Resistance Measurement, 

Ω

➭ 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. 

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 “Ω”. 
➭ Connect the device under test as shown.

Note



Use short or shielded measurement cables in the case of 
high-impedance resistance.

Improving Accuracy by means of Zero Balancing

Cable resistance and contact resistance can be eliminated in all 
measuring ranges by means of zero balancing (see section 4.2).

COM mA A

V

Temp

Ω MΩ

ISO

R

x

R

x

0

000.0

k

Ω

Ω

6 ranges: 300

Ω , 3 kΩ, 30 kΩ, 300 kΩ , 3 MΩ and 30 MΩ

Measuring ranges: 0.1 k

Ω to 31 MΩ

Ω