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7-6
E
–+
ELEC
ELECTRICAL ANALYSIS
ELECTRICAL ANALYSIS
INSPECTION
CAUTION:
● All measuring instruments should be han-
dled with special care. Damaged or mis-
handled instruments will not measure
properly.
● On an instrument powered by dry batter-
ies, check the battery’s voltage periodi-
cally and replace the batteries if
necessary.
Digital tester
NOTE:
Throughout this chapter the digital tester’s
part number has been omitted. Refer to the
following part number.
NOTE:
“ ” indicates a continuity of electric-
ity; i.e., a closed circuit at the respective
switch position.
Low resistance measurement
NOTE:
● When measuring a resistance of 10 Ω or
less with the digital tester, the correct
measurement cannot be obtained
because of the tester’s internal resistance.
● To obtain the correct value, subtract the
internal resistance from the displayed
measurement.
● The internal resistance of the tester can be
obtained by connecting both of its termi-
nals.
Digital tester:
J-39299/90890-06752
Correct value =
Displayed measurement –
Internal resistance
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