Bender UNIMET 300ST, Operating Manual

Page: 20 / 62

Operation and configuration
20 TGH1365en/10.2012
4.5.1 Test probe calibration
Zero balance must be carried out for the UNIMET® 300ST test probe. As with an ohmmeter, this en-
sures that the ohmic resistance of the test probe will not affect the PE conductor test result.
Recalibrate each time after connecting
– another test probe,
– another measuring lead,
– or a three-phase adapter
to the test system.
Proceed as follows to calibrate the test probe:
*)
With permanently connected Protection class I devices or extension cables al-
so, the low resistance continuity of the PE conductor can be tested. The measure-
ment is carried out between the test probe and the measuring lead connected to
the yellow socket E.
Before the test, a single zero calibration must be carried out with the test probe
and the measuring lead.
Car
ry out a zero calibration again if you want to run the PE conductor test with
the test probe on equipment with Schuko plug .
Failure to follow these instructions may lead to false test results.
Device setting
1.Select “Test probe calibr.”
2. Hold the test probe on the earth contact
of the test socket
*)
.
Make sure that the test probe
remains there during the entire
calibration process.
*** CALIBRATION ***
Insert test probe
and contact PE of
socket outl. Next:
*** CALIBRATION ***
Testprobe/Cable
Please wait !
3. Start calibration.
1. Exit
2. Test probe calibr.
3. Device type query
4. Warm-up/cool-down
ESC