27
28
3. Test Methods
3.1 Checking before the Test
3.1.1 Checking procedures
In order to ensure safety, please check carefully before use.
Warning
Note: In case any problem is found, please do not use the tester.
3.2 Insulation resistance test
Push down
‘MEASURE’ button
and hold it > 1 s to
start insulation test.
Clip red and black
test probes to the
two ends of a
resistor.
Set the test
voltage on
the tester as
5.0 kV.
Also clip probes
of the voltmeter
to the two ends
of the resistor.
Danger
1. In case the socket is damaged, please do not use the tester.
2. Perform checking according to Table 3-1 before connecting test probes.
3. Before measurement, please make sure that the test object is not live.
Table 3-1
1. Before use, please make sure that the insulation of the testing probes and cables are flawless and no conducting part is
exposed without insulation; otherwise, using the meter will cause electrical damage and injury. Please contact the supplier
for replacement.
2. Please make sure that the socket is clean and dry. Use a piece of dry cloth to wipe off any water to avoid test error.
3. Check the bottom shell of the tester, top cover, testing probes and alligator clips for damages; please do not use the meter
in case any damage is found.
4. Check readings for testing voltage and resistance.
5. Prepare a calibration resistor (voltage-proof value: 5 kV, resistance: 20 M
Ω);
also prepare a DC voltage meter (input
resistance: greater than 1,000 M
Ω
, measuring range for voltage: greater than 5.5 kV DC).
Check the readings on
the voltmeter and the
tester (between 5 and
5.5 kV)
Gently touch
‘MEASURE’
button to stop
insulation
measurement.
Check if the reading of
insulation resistance
is 0 and if readings of
testing voltage are
between 5 and 5.5 kV.
Directly connect red tester
probe to the black probe,
and set testing voltage as
5 kV, and then start
insulation measurement.
Check if the
reading of
resistance on
the tester is 20
M
Ω.
Please observe the following instructions during use to avoid electrical damage and short-circuiting.
Items for check
Measures to be taken
If the flash mark and the
backlight of ‘measure’
button are turned off?
Connect test probes to the tester and check the three points as listed
above this table; If everything is safe, connect the probes to the test object.
Perform checking according to Table 3-2.
Results of check
Turned off
Flashing
Press ‘measure’ button to stop generating voltages.
Table 3-2
Items for check
Measures to be taken
If the flash mark and the
backlight of ‘measure’
button are flashing?
Measurements can be carried out.
Results of check
Not flashing
Flashing
Immediately disconnect the test probes from the test object. Turn off the
power supply for the test object, or discharge the test object.
