8
3.
Turn the rear-panel Power Switch ON.
4.
Press the red
TRIGGER
button to discharge the main capacitor into the internal resistor of the
MegaPulse unit.
5.
Turn the rear-panel Power Switch OFF.
Voltage Set Point Adjustment
NOTE
If the front display shows the word “Off” when trying the adjustment, it means the front Voltage
knob has been disabled by the Testminder software. See section “Front Keyboard and Voltage Knob
Enable”
To adjust the Voltage Set Point:
1.
Press the VOLTAGE Adjust knob one time to enable the adjustment mode, digits for thousands and
hundreds will start blinking for a few seconds.
2.
While the digits are still blinking, turn the VOLTAGE Adjust knob, clockwise or counterclockwise,
to change the value of the blinking digits.
3.
While digits are still blinking, press the VOLTAGE Adjust knob again and the tens and unit digits
will start blinking for a few seconds.
4.
While the digits are blinking, turn the VOLTAGE Adjust knob, clockwise or counterclockwise, to
change the value of the blinking digits.
5.
After a few seconds without any change on the VOLTAGE Adjust knob, the desired output voltage
will be set.
Charge and Trigger a Pulse
The following procedure will explain how to generate a high voltage pulse with the MegaPulse unit. The
MegaPulse 968-B Metallic A Tester is capable to maintain a specific voltage charge selected by the Voltage
Set Point.
CAUTION
High voltage generated by the MegaPulse tester is exposed during this test. A risk of shock exists.
Exercise care when using the MegaPulse unit.
1.
Confirm the Voltage Set Point by pressing the VOLTAGE Adjust Knob, the current setting will
blink for a few seconds on the front meter.
2.
If a different Voltage Set Point is needed it, refer to section “Voltage Set Point Adjustment.”
3.
Push the yellow CHARGE button to start charging the internal high voltage capacitor and wait until
the front meter reaches value set on Steps 1 or 2. Verify that the red TRIGGER indicator is now lit.
4.
Once the desired voltage is reached, press the red
TRIGGER
button to deliver the high voltage
pulse (be sure not to touch the output and return leads when pressing the trigger switch).
5.
Turn the rear-panel Power Switch OFF.
Pulse Verification Procedure
The following procedure will verify that the high voltage pulse is properly generated by the MegaPulse tester.
We recommend that this procedure be conducted periodically to ensure proper operation of the tester.
The following items are needed to conduct this procedure:
•
High voltage oscilloscope probe (1000:1)
•
Digital Oscilloscope
Always ensure that the measuring instruments are rated for the voltage and frequency response involved. A
digital oscilloscope or probe with a low frequency response will result in erroneous readings that could be
misread.
