38
Inspection Before Use
Check item
Action
No indicators are missing.
Display all indicators and ensure that no
indicators are missing. (p. 75) If any
of the indicators are missing, send the
instrument for repair.
Operation check
This section introduces some of the operation checks. Periodical
calibration is necessary in order to ensure that this instrument
operates according to its speci
fi
cations.
1
Check that the test leads are not broken.
Check method
Action
Regarding the continuity check,
deliberately short circuit the test
leads and then check the display.
Red
Black
For the DT4254:
Check that there is nothing abnormal
in operation check
2
Normal:
A buzzer sounds and the value
stabilizes at around 0
Ω
.
Abnormal:
A buzzer does not sound and a
numeric value other than the above
appears.
Corrective action:
The test leads may be broken.
Replace with those speci
fi
ed by our
company.
If the same phenomena persist
even after the test leads are
replaced, a malfunction may occur.
Halt inspection and then send the
instrument for repair.
For the DT4255, the fuse may be
broken. Check that the fuse is not
broken. (p.
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