Compliance West MegaPulse 2x10s-2.5, Instruction Manual

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Table 2. Controls, Indicators, Connectors – MegaPulse series Front Panel
ITEM NAME FUNCTION
1 VOLTAGE Adjust Knob Turn Clockwise to increase the output voltage after the CHARGE button has been pressed. Turn the knob
fully counterclockwise (lowest voltage setting) before the start of each test, and after the end of each test.
2 POLARITY switch The polarity switch only operates when the CHARGE indicator is lit, i.e. the output is not charged. The
polarity of the output waveform can be changed by pressing the POLARITY switch on the front panel. Press
this switch to toggle the output polarity from Normal to Reverse. The polarity is Normal when the NOR
indicator is lit. In this case, the High Voltage will appear on the OUTPUT as a positive pulse relative to the
RETURN jack. When the polarity switch is in the Reverse position ( REV indicator is lit), the High voltage
will appear on the OUTPUT as a negative pulse relative to the RETURN jack.
3 NOR REV indicator Indicates the state of the Output Polarity switch. NOR indicate Normal position, REV indicates Reverse
position.
4 CHARGE switch Press this switch to begin charging the impulse storage capacitor (C1 in Figure 1). The CHARGE indicator
will turn off after the CHARGE switch is pressed, and the TRIGGER indicator will turn on. The voltage on
the capacitor will appear on the LED Display, Item 8. This voltage will appear across the output leads when
the
TRIGGER switch is pressed. Note that the POLARITY switch is prevented from operating after the
CHARGE switch has been pressed.
5 CHARGE indicator This Yellow indicator is lit to show that pressing the CHARGE switch is the next logical step in a test
sequence. Pressing the Charge switch causes the CHARGE indicator to go out.
6 TRIGGER switch Press this switch (after pressing the CHARGE switch to charge the storage capacitor) to trigger the output
impulse waveform. The impulse waveform will appear across the output leads.
7 TRIGGER indicator This Red indicator is lit to show that pressing the TRIGGER switch is the next logical step in a test sequence.
This indicator will turn on after the CHARGE switch is pressed, and will remain on until the TRIGGER
switch is pressed. Pressing the TRIGGER switch causes the TRIGGER indicator to go out.
8 Voltage meter Displays the output voltage set point. This voltage is the open-circuit peak voltage that will appear across the
output leads when the trigger button is pressed. The voltage reading will increase from zero to the voltage set
point when the Charge switch is pressed. Note that the Voltage meter may indicate that some residual voltage
is present on the main storage capacitor, even when the tester is first turned ON. This is due to inherent
charging of the internal capacitors. Pressing the
TRIGGER switch will discharge the capacitors (be sure not
to touch the output and return leads when pressing the trigger switch). Note that the peak amplitude of the
measured output waveform is proportional to the voltage that is read of the front panel of the MegaPulse, but it
will always be somewhat lower. This is because the meter on the MegaPulse is measuring the voltage on the
main impulse storage capacitor (C1 in Figure 1). This voltage will intentionally dissipate to some extent before
reaching the output leads. Therefore, it is important to measure the peak amplitude of the output waveform,
and adjust the output of the MegaPulse accordingly.
9 OUTPUT jack The impulse waveform appears on the OUTPUT jack, referenced to the RETURN jack. When the
POLARITY switch is in the Normal position ( NOR indicator is lit) the output will be a positive pulse. When
the POLARITY switch is in the Reverse position ( REV indicator is lit) the output will be a negative pulse.
10 RETURN jack This is the return for the impulse waveform. This jack is referenced to the chassis of the MegaPulse, and is
referenced to earth ground as long as the MegaPulse is properly grounded. Even though this jack is referenced
to ground, it should be treated as hazardous whenever the MegaPulse is turned ON.
11 Model designation area The specific MegaPulse model is indicated in this area. Optional metering/measurement test points may also
be installed in this area.