Hioki ST5520-01 - 2-Terminal Contact Check Function

59
Checking Faulty Contact and Contact Status (Contact check function)
2-terminalcontactcheckfunction
If the insulation resistance of the equipment to be measured is within the
measurement range of the instrument, a 2-terminal contact check can be performed
by setting the upper and lower limit values of the comparator.
(Example)Whentheinsulationresistanceoftheequipmenttobemeasuredis100M
Ω
Test voltage 500 V
Upper limit value 110 M
Ω
Lower limit value 90 M
Ω
Test duration 1 s
1
Setthetestvoltageto500V.
2
Setthelowerlimitvalueto90M
Ω
andtheupperlimitvalueto110M
Ω
.
3
Setthetestdurationto1s.
4
Connect the HIGH and LOW side test leads to the equipment to be
measured.
5
Start a test.
6
When the measured value is Over.F and the U.FAIL lamp turns on, the
contact may be faulty or the probe wires may be broken.
10
9
8
7
6
5
4
3
2
1
Appx. Ind.