Tonghui TH9310 Series - 2.6 To Ensure Long-Term Use without Failures

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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
T≤40℃
AC
>12mA (TH9320)
>6mA (TH9310)
At least as long as the
output time
Maximum of 1
minute
<8mA (TH9320)
<4m (TH9310)
Not necessary
Continuous output
possible
DC
>6mA (TH9320)
>3mA (TH9310)
At least as long as the
output time
Maximum of 1
minute
<4mA (TH9320)
<2mA (TH9310)
At least as long as the
charging wait time
(WAIT TIME)
Continuous output
possible
Note: Test time <= Output time <= voltage rise time + test time + voltage fall time
The use of the instrument must be suspended while the fan is working continuously for more than
thirty minutes, otherwise the amplifier output module may be burned due to overheating.
2.7 Daily Checking
To avoid accidents, confirm at least the following before starting operation:
1. The input source complies with the standard and the tester power configuration is correct.
2. The tester is connected to an earth ground.
3. The coating of the high-voltage test lead wire is free from cracks, fissures, and breakage.
4. Without connecting the test lines, the instrument can finish the test successfully when starting test by
default.
5. The tester generates FAIL signal when the ends of the low-voltage test lead wire and high-voltage test
lead wire are short-circuited.