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the tester when it has failed.
！
WARNING
Keep the tester away of other people until you call our service engineer for help.
Immediately call Tonghui distributor/agent. It is hazardous for an unqualified person to attempt
to troubleshoot any tester problem.
2.6 To Ensure Long-Term Use without Failures
The withstanding voltage-generating block of the tester is designed to release half the rated
amount of heat, in consideration of the size, weight, cost, and other factors of the tester. The
tester must therefore be used within the ranges specified below. If you deviate from these
ranges, the output block may be heated to excess, activating the internal protection circuit.
Should this happen, wait until the temperature returns to the normal level.
Output requirements for withstanding voltage testing
Ambient
temperature
Upper current
Pause Time
Output time
>20mA
（
TH9201/S
）
>12mA
（
TH9201B/C
）
At least as long as the
output time
Maximum of 1
minute
AC
<10mA
（
TH9201/S
）
<6mA
（
TH9201B/C
）
Not necessary
Continuous output
possible
>6mA(TH9201/S)
>3m
（
TH9201B/C
）
At least as long as the
output time
Maximum of 1
minute
T
≤
40
℃
DC
<5mA
（
TH9201/B
）
<2mA(TH9201B/C)
At least as long as the
judgment
wait time (WAIT TIME)
Continuous output
possible
(Output time = voltage rise time + test time + voltage fall time)
2.7 Daily Checking
To avoid accidents, confirm at least the following before starting operation:
