41
Inspection Before Use
DT4255 check method Action
If normal at “
1
Check that the test
leads are not broken.” (p. 38), the
check below is unnecessary.
Abnormal:
1. Remove the fuse from the
instrument. (p. 100)
2. Check the resistance value of
the fuse using other tester.
Normal:
Fuse rating Resistance
630 mA 1 to 5
Ω
Abnormal:
If the value above is not obtained (the
value higher than that is displayed),
replace the fuse. (p. 100)
4
Check that the electric charge detection function operates
normally. (Only the DT4254, DT4255, and DT4256)
Check method Action
Position the detector on a known
power supply, such as a power outlet.
(The position of the rotary switch
varies depending on the model.)
Normal:
A buzzer sounds and the red LED
lights up (detecting mode).
Abnormal:
The display does not change. A
buzzer does not sound or the red
LED does not light up.
Solution:
A malfunction may have occurred.
Stop the inspection and do not use
the instrument.
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