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Poor contact of battery
contacts
Replace the battery contacts.
A break in a battery
harness
Make a continuity test of test
lead. If there is no continuity,
replace the battery harness.
Departure of the
ON/OFF button
Poor contact of power
plug
Re-plug or replace a plug.
Defect of circuit com-
ponent
Defect of PCB; when current
consumption is about 100mA
or more at 6V of battery vol-
tage. Replace the PCB.
Indicating ERROR
(Display “Err”, big
error results or re-
sults unstable)
Insufficient capacity of
battery
Contact surface of jaw is
polluted by dust, oil etc.
Trigger the clamp several times
and then re-boot.
Defect of circuit com-
ponent
Study the manual and follow it.
Incapable mea-
surement of resis-
tance
Insufficient capacity of
battery
Replace the battery when “Low
battery” mark is displayed on
the LCD.
Poor enclose of jaw,
indicating “jaw-open”
symbol on LCD
Trigger the clamp several times
and then re-boot.
Contact surface of jaw is
polluted by dust, oil etc.
Without self-calibration
before test
Re-boot follow the manual,
conduct measurement after
self-calibration finished.
Defect of circuit com-
ponent
Check above points first. If
there is no problem, replace the
PCB, and do re-adjustment.
LCD Indication
error
(chip of segment,
arithmetic
point, unit and so
on)
Poor contact of LCD
connection wire
Re-plug the LCD connect plug
or replace the plug.
Insufficient capacity of
battery
Defect of circuit com-
ponent
Incapable to hold
reading
HOLD button Depart
from the position
Defect of circuit com-
ponent