Compliance West MegaPulse 2x10s-2.5 Instruction Manual Download Page 6

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Safety Techniques

The high voltage circuit of the MegaPulse can be shut off at any time by turning OFF the rear

power switch. Note that there are residual voltages inside the equipment that may take up to 5 minutes to
bleed off to safe levels.

The MegaPulse tester is provided with a

VOLTAGE ADJUST

knob on the front panel. This

should always be adjusted fully counterclockwise to the minimum position at the start of testing. In
addition, this knob should be adjusted back to the minimum position at the completion of all testing.

The MegaPulse tester is provided with a

CHARGE

switch that is in the unarmed "Standby"

setting when the tester is first turned ON. When the yellow

CHARGE

button is lit, the tester will not

provide high voltage until the

CHARGE

Button and the

TRIGGER

Button have been pressed in order.

To prevent inadvertent operation, the operator should be instructed not to press the

CHARGE

Button until

the test is ready.

The MegaPulse tester has been designed for one-touch operation with the right hand. If possible,

it should be set up to the left and in front of the equipment under test. The equipment under test should be
connected to the MegaPulse tester and then left alone by the operator. After the operator is clear of the
Tester and the equipment under test, the operator should turn the rear-panel power switch to ON, press the

CHARGE

Button, adjust the voltage to the desired level (as displayed on the front panel meter), then press

the

TRIGGER

Button, with his right hand. This will allow the greatest separation between the operator

and the test being conducted.

The MegaPulse tester is designed to bleed the high voltage away after the test has concluded. In

order to ensure that any voltage present in the equipment being tested has been completely bled away, the
operator should not unplug the equipment under test from the MegaPulse until the front panel meter reads a
safe level (40 volts or less is generally considered a safe level). Pressing the TRIGGER button before
disconnecting main power (or turning the equipment off) will ensure that the internal capacitors are
discharged as much as possible.

Using the MegaPulse Impulse Tester

The impulse withstand test involves high voltage and caution should be exercised when using the

Tester. The

RETURN

lead is referenced to building ground when properly connected. However, both the

OUTPUT

and

RETURN

leads must always be treated as Hazardous whenever the power switch of the

MegaPulse is in the ON position.

The MegaPulse impulse tester generates the impulse waveform only; it does not determine

Passing or Failing results. It is Operator’s responsibility to monitor the output waveform and determine
Passing or Failing results. In monitoring the impulse waveform, consider the following points:

The Impulse waveform is high voltage, and high frequency (short duration). Always ensure that

the measuring instrument (usually an oscilloscope with a high-voltage probe) is rated for the voltage
involved, and that the frequency response of the instrument and probe are capable of measuring the output
waveform of the MegaPulse Impulse Tester. A measuring instrument or probe with a low frequency
response will result in erroneous readings that could be mis-read.

Pressing the POLARITY switch on the front panel can change the polarity of the output

waveform. 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