Operation; Operational Guidelines - Time Electronics InsCal 5068 User Manual

Time Electronics
5068 Insulation Tester Calibrator
5

Operation

5.1

Operational Guidelines

Notes:
1. UUT: stands for Unit Under Test (i.e. the insulation tester or the megohm meter).
2. Wherever possible use the manufacturer of the UUT's supplied test leads.
The 5068 can measure test voltages generated by a UUT up to 2.5 kV.
Be aware that the test voltage for high resistance measurements is dangerous and can
cause electric shock!
Always remove the battery charger leads from both the 5068 and the UUT before
starting the calibration setup.
Use only the measuring leads supplied with the UUT or those supplied with the 5068.
When checking high resistance values the leads may pick up electrical interference,
which can cause a disturbance to the readings obtained. Some manufactures fit a
guard connection for use with dedicated leads, this will stabilise the readings.
It is not recommended to operate the resistance dial switch while a test is made. This
will not automatically do any damage but may cause arcing and create transients which
could give false readings on the UUT display due to the fact that the switch is break-
before-make between each resistor. This will ensure that contact arc is suppressed
with high relative humidity.
Avoid opening the 5068 case lid in the rain or in steamy conditions for the moisture
will impair the readings.
Observe safety at all times and if possible, carry out the tests in a low humidity
environment.
Note: Insulation testers will vary, and the controls may be different than those referenced in this manual.
However, the testing principles should still apply.
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User Manual