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5.2. Preliminary checks
If the battery symbol is shown on the LCD, then replace the
batteries with new 8 alkalines batteries (AA) before proceeding.
Check the current regulation:
1. Connect the current leads to C
2. Select a range, and short the current test leads. The R
should go off, indicating that the current regulation is ok.
Check the voltage measurement:
1. Connect the potential leads to P
2. Short the P
3. Remove the short from P
LED should lit, indicating an over-voltage or over-range.
This proving test can be repeated on all the ranges if needed.
You can also check the polarity indication of the milli-voltmeter
by touching the potential test leads P
LED should not lit, indicating an over-voltage or over-range.
The "-" indicator should be indicating "-" on the LCD, showing the
polarity change.
Total check can be done by shorting all the test leads together
C
, C
, P
, P
1
2
1
(depending of the crocodile clips used and how they are
shorted). Both R
everything works okay.
5.3. Precautions
*
Always ensure, that the circuit to be measured is switched
"OFF",
isolated
connecting the test leads.
and P
. The display should indicate 000.
1
2
. The display should indicate close to 000
2
and R
LED should be OFF, indicating, that
C
P
and
and C
.
1
2
and P
1
and P
and C
1
2
to C
1
2
completely
de-energised
-23-
.
2
and C
. The R
1
2
and P
to C
. The R
2
1
LED
C
P
P
before
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