Berner BLM 80 Bedienungsanleitung Seite 26

Regularly check the accuracy of the grade meas-
urement by carrying out a reversal measurement or
with the spirit levels of the measuring rail.
In case of greater deviation, the measuring tool
must be recalibrated. For this, press and hold the
grade measurement button 3. Follow the directions
on the display.
To end the "Measuring rail" operating mode,
switch the measuring tool off and remove it from
the measuring rail.
Troubleshooting
Corrective Measures
Cause
Temperature warning indicator (k) flashing;
measurement not possible
The measuring tool is out-
side the operating tempera-
ture range from – 10 °C to
+ 50 °C (in the function con-
tinuous measurement up to
+40 °C ).
"ERROR" indication in the display
Addition/Subtraction of
measured values with differ-
ent units of measure
The angle between the laser
beam and the target is too
acute.
The target surface reflects
too intensely (e.g. a mirror)
or insufficiently (e.g. black
fabric), or the ambient light
is too bright.
The laser beam outlet 16 or
the reception lens 17 are
misted up (e.g. due to a rap-
id temperature change).
Calculated value is greater
2
than 999999 m/m /m
Indication ">60 ° " or "< – 60 ° " on the display
The inclination measuring
range for the measuring
mode and/or the reference
plane has been exceeded.
2 609 141 098 • 19.7.13
Causes and
–
Corrective
Measure
Wait until the meas-
uring tool has
reached the operat-
ing temperature
Only add/subtract
measured values
with the same units
of measure
Enlarge the angle
between the laser
beam and the target
Use a laser target
plate
Wipe the laser
beam outlet 16
and/or the recep-
tion lens 17 dry us-
ing a soft cloth
Divide calculation
3
. into intermediate
steps
Carry out the meas-
urement within the
specified angle
range.
Cause
"CAL" and "ERROR" indication in the display
The calibration of the grade
measurement was not car-
ried out in the correct se-
quence or in the correct po-
sitions.
The surfaces used for the
calibration were not accu-
rately aligned (horizontal or
vertical).
The measuring tool was
moved or tilted while press-
ing the button.
Battery charge-control indicator (g), tempera-
ture warning (k) and "ERROR" indication in the
display
Temperature of the measur-
ing tool not within the allow-
able charge-temperature
range
Battery charge-control indicator (g) and
"ERROR" indication in the display
Battery charging voltage not
correct
Battery charge-control indicator (g) and clock
symbol (f) in the display
Charge duration clearly too
long, as charging current
too low.
Measuring result not plausible
The target surface does not
reflect correctly (e.g. water,
glass).
Corrective
Measure
Repeat the calibra-
tion according to
the instructions on
the display and in
the operating in-
structions.
Repeat the calibra-
tion on a horizontal
or vertical surface; if
required, check the
surface first with a
level.
Repeat the calibra-
tion and hold the
measuring tool in
place while press-
ing the button.
Wait until the
charge-tempera-
ture range is
reached.
Check if the plug-in
connection has
been established
correctly and if the
battery charger is
operating properly.
When the unit sym-
bol is flashing, the
battery is defective
and must be re-
placed by a Berner
after-sales service.
Only use the origi-
nal Berner charger.
Cover off the target
surface
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