12
The Timer Control switch allows test time to be controlled by the HT-20KVPac internal
timer or to continue until terminated by the operator.
When this switch is in the DEFEAT position, the test will continue only while the TEST
button is held down. The minimum test time is approx. 1 second.
When this switch is in the ON position, the test time will be controlled by the HT-
20KVPac internal timer. For information on how to set this time, see instructions above.
The Test Timer must be defeated if Breakdown Detect Defeat is desired. See Table 4-3
for details.
Setting the Failure Shutdown Switch
Use extreme caution when using this feature
The Breakdown Detect switch allows the operator to continue testing after a failure is
encountered. This allows the operator to find the breakdown point, but
all arc shutdown
circuitry in the HT-20KVPac is disabled when the Breakdown Detect switch is in the
DEFEAT position
. The excess leakage limit may stop the test. Also the tests may be terminated
at any time by releasing the TEST button.
WARNING: Testing with the Shutdown Limit switch in the DEFEAT position is
extremely hazardous. The HT-20KVPac can generate lethal levels of voltage and current.
Therefore, care should be taken in examining the equipment being tested, to locate areas of
failure while the HT-20KVPac is operating.
Operating Techniques
The following paragraphs describe how to operate the HT-20KVPac Dielectric Withstand
Tester.
CAUTION:
High voltage is generated by the HT-20KVPac. Although the chassis of the
equipment under test is grounded by the HT-20KVPac, a risk of shock exists.
Testing Products
This section describes how to conduct a test. Testing can be terminated at any time by
pressing the RESET button.
1.
Set up tester to correct parameters for unit to be tested using the previously described
procedures.
2.
Connect the HT-20KVPac to a correctly rated source of supply and turn it on.
3.
Plug the black lead into the Return receptacle. Plug the red lead into the Output receptacle.
4.
Connect the alligator clips of the leads across the circuit or part being tested. Keep in mind
that the black lead is connected to earth ground.
5.
Press the RESET button, the TEST button should light, indicating that the HT-20KVPac is
ready to test.
Содержание HT-20KVPac
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