34
11. Press the
Reset
button until "V2" is displayed on the front panel meter.
12. Turn the Voltage Adjust on the rear panel to minimum (counterclockwise). Press the
Test
button and 500 will be displayed on the front panel meter (for either AC and DC). Be
careful as the HT-PR will be putting out voltage at this point.
13. Turn the Voltage Adjust on the rear panel clockwise until the output on the DMM equals
the appropriate voltage (500 Volts AC or DC) and press the Test button. The display will
now display "V2" again. The voltage is now be calibrated.
14. Turn Off the HT-PR tester.
15. The voltage can be verified by turning on the HT-PR, running a test, and using the 1000:1
voltage probe to check the meter at different voltages. If the voltages are not /- 2%
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.
For the HT-3000PR use the AC/DC selector switch on the front panel to choose AC.
3.
Turn the Voltage Adjust on the rear panel to minimum (counterclockwise).
4.
Connect the output of the HT-PR through a 60K
Ω
, 100 watt high voltage resistor in series
with a calibrated DMM capable of measuring 10.0mA AC and returning to the Return jack
on the front panel of the HT-PR.
5.
In the calibration mode, hit the Reset button until "L1" is displayed on the front panel.
6.
Once "L1" is displayed, press the Test button once and 10.0 will be displayed.
7.
Slowly increase the variac watching the current flowing on the DMM. Adjust the variac
until 10.0mA AC is displayed on the DMM and then press the Test button.
8.
The display will show "hold".
9.
Wait until the display returns to "L1".
10.
Turn the Voltage Adjust on the rear panel to minimum (counterclockwise).
11.
Press the Reset button until “L2” is displayed on the front panel.
12.
Once "L2" is displayed, press the Test button once and 1.0 will be displayed.
13.
Slowly increase the variac watching the current flowing on the DMM. Adjust the variac
until 1.0mA AC is displayed on the DMM and then press the Test button, the display will
show “hold”.
14.
Wait until the display returns to "L2", at this point the AC current is now calibrated.
13.
For the HT-3000PR use the AC/DC selector switch on the front panel to choose DC.
14.
Connect the output of the HT-PR through a 240K
Ω
, 100 watt high voltage resistor in series
with a calibrated DMM capable of measuring 5.0mA DC and returning to the Return jack
on the front panel of the HT-PR.
15.
In the calibration mode, hit the Reset button until "L1" is displayed on the front panel.
16.
Once "L1" is displayed, press the Test button once and 5.0 will be displayed.
17.
Slowly increase the variac watching the current flowing on the DMM. Adjust the variac
until 5.0mA DC is displayed on the DMM and then press the Test button.
18.
The display will show "hold".
19.
Wait until the display returns to "L1".
20. Turn the Voltage Adjust on the rear panel to minimum (counterclockwise).
21.
Press the Reset button until “L2” is displayed on the front panel.
22.
Once "L2" is displayed, press the Test button once and 1.0 will be displayed.
23. Slowly increase the variac watching the current flowing on the DMM. Adjust the variac
Summary of Contents for HT-2000PR
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Page 20: ...14 Figure 3 Controls Indicators Connectors Model HT 3000PR Front Panel...
Page 22: ...16 Figure 4 Controls Indicators Connectors HT PR Rear Panel...
