Zeiss VISULAS green, Manual

Page: 87 / 116

Documentation set 9 Maintenance
VISULAS green 9.1 Testing electrical safety
000000-2096-101-DokS-GB-181218 87 / 116
Figure 40: Measurement point on the instrument table
ð
The measured value may not exceed 0.3 Ω.
3. If there are doubts about the effectiveness of the insulation
(such as multiple triggering of the fault circuit interrupter or
other protective devices at the place of use, or traces of liquid
on the system which suggest the penetration of liquid),
measure the insulation resistance with a test voltage of 500 V.
ð
The measured value may not be less than 2 MΩ.
4. After successful measurement, the device leakage current must
be measured. Preferably, the differential current method should
be used. The system is in its operating state. Press the
measuring tip onto the measurement points again.
ð The measured value may not exceed 0.5 mA.
5. The inspection is concluded by a function check. This should be
performed by a person who is familiar with the application.
6. Note down the measured values.