User Manual

User Manual DPM-816 PRO Page 25
Possible malfunctions and suggested remedies
Malfunction
Probable cause
Remedy
The device does not turn on, or
turns on and immediately turns
off.
Incorrect installation of the
battery, reversed polarity. The
battery is discharged, or its
service lifespan has ended.
Check the battery polarity. If
necessary, replace the
battery.
The device turns off when the
backlight is turned on, or the low
battery indicator is displayed.
The battery is low, or its
service lifespan has ended.
Replace the battery with a
new one.
The device occasionally
displays an incorrect result.
The measured surface or the
sensor is dirty.
Check the measured surface
and the device sensor for dust
or dirt. The sensor should
move smoothly without jerking
or jamming. If necessary,
clean the sensor and get rid of
dirt.
The device displays an incorrect
result when measuring a
calibration plate.
Knocked device calibration.
Dust present on the surface of
the calibration plate.
Complete a two-point
calibration. Clean the
calibration plate from dust.
When measuring thickness on a
metal surface without a coating,
the device displays a non-zero
result.
Knocked or incomplete
calibration of the device.
Complete a zero deviation
calibration or a two-point
calibration.
The device does not take
measurements, or the readings
greatly vary from actual
thickness.
Interference from metal
objects or strong magnetic
fields.
When turning on the device, it
should be located not closer
than 0.3 m from large metal
objects and the measured
surface. Use the device away
from sources of strong
magnetic fields.
During prolonged continuous
measurement, the
measurement error starts to
increase.
Reduction in battery charge.
Stop the measurement and
leave the device turned on,
away from metal objects for
10-20 seconds. The device
will automatically recalibrate.
The device selects the wrong
method of measurement.
Knocked or incorrectly
completed six-point calibration
while in measurement mode
P.
Unable to determine the best
measurement method.
Complete the six-point
calibration for each method of
measurement, if you're
measuring in P mode.
Select the desired method of
measurement manually, using
F(Fe) and N(nFe) modes.