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3. OPERATION
Caution
Always make sure the precautions and limitations of the unit being
tested are observed. If necessary refer to the specification of the unit
being tested.
Also refer to the graph of typical output voltage under various load
conditions at the rear of these instructions.
3.1 Proving Unit LED indications
LED
High Voltage
Low Battery
3.2 Proving a Test Lamp, Voltage Tester/Indicator, DMM etc.
Place one probe of the unit under test into the left hand socket of the
proving unit until it makes contact with the terminal. Place the other
probe into the right hand terminal of the proving unit and gently press
down.
On the PD440S and PD690S the high voltage indicator will
illuminate.
Observe that the required indicators on the unit under test illuminate,
then withdraw the probe from the right hand terminal first, and then
the left.
The output will last for a maximum of 10s. If the probe terminals
are held down for longer than 10s the voltage will go off and low
4
Proving unit model No.
All models
All models
LED illumination indicates
High voltage output at proving
unit terminals
Proving unit batteries are low
Replace batteries
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