17
12. Turn the Voltage Adjust on the rear panel clockwise until the output on the DMM equals
500 volts AC and press the Test button. The display will now display "V2" again. The
voltage is now be calibrated.
13. Turn Off the HT-3000P-1A-AC tester.
14. The voltage can be verified by turning on the HT-3000P-1A-AC, running a test, and using
the 1000:1 voltage probe to check the meter at different voltages. If the voltages are not
/- 2% +/- 1 count at each voltage, the voltage calibration must be performed again
starting at step 1 above.
Current Calibration Adjustment
1.
You must be in Calibration Mode as in step 3 under the Voltage Calibration Adjustment
above.
2.
Turn the Voltage Adjust on the rear panel to minimum (counterclockwise).
3.
Connect the output of the HT-3000P-1A-AC through a 3K ohm, 3600 watt high voltage
resistor in series with a calibrated DMM capable of measuring 1A AC and returning to the
Return jack on the front panel of the HT-3000P-1A-AC.
4.
In the calibration mode, hit the Reset button until "L1" is displayed on the front panel.
5.
Once "L1" is displayed, press the Test button once and .80 will be displayed.
6.
Slowly increase the variac watching the current flowing on the DMM. Adjust the variac
until 0.80 A AC is displayed on the DMM and then press the Test button.
7.
The display will show "hold".
8.
Wait until the display returns to "L1".
9.
Press Reset button and meter will display “L2”. Press the Test button once and .10 will be
displayed.
10.
Slowly increase the variac watching the current flowing on the DMM, Adjust the variac
until 0.10 A AC is displayed on the DMM and then press the Test button.
11.
The display will show “hold”.
12.
Wait until the display returns to “L2”. At this point the leakage current is calibrated.
13. The current can be verified by turning on the HT-3000P-1A-AC, running a test, and using
DMM in series with the load measuring current at different current levels. If the current is
not /- 2% +/- 1 count, the current calibration must be performed again starting at
step 1 above.
Summary of Contents for HT-3000P-1A-AC
Page 1: ...HT 3000P 1A AC Dielectric Withstand Tester 0 3000 Volts AC Output Instruction Manual...
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Page 14: ...8 Figure 2 Controls Indicators Connectors Model HT 3000P 1A AC Front Panel...
