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3. OPERATION
3.1 Installing or Replacing Battery
Remove the rear battery cover by unscrewing the large plated screw at the
end of the cover. The screw is captive but once it is loose the battery cover
can be lifted clear.
Fit 1 new 6LR61 (MN1604, PP3) 9V alkaline battery.
Replace the battery cover by repositioning it onto the rear casing then
tighten the captive screw. Do not over-tighten.
3.2 How it Works
Always make sure the precautions applicable to the unit being tested are
observed.
Place the Hi probe of the unit under test into the left hand (+) socket until
it makes contact with the terminal. Place the Lo probe of the unit under
test into the right hand (-) terminal and press down firmly until the PD240
POWER indicator illuminates and the probe makes contact with the terminal.
Observe that the required indicators on the unit under test are illuminated,
then withdraw the probe from the right hand terminal, then the left.
If the PD240 power on indicator fails to illuminate, then consult the unit
under test (UUT) literature, to check the loading effect of the UUT upon the
PD240 output voltage (see figure 1).
If the unit under test should have no adverse effect upon the PD240 output
voltage then check the condition of the battery and replace if required.
3
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