Bosch PLR 25 Notice Originale page 27

Layers of air at different temperatures and indirectly received reflections can also influ-
ence the measured value.
Errors – causes and corrective measures
Cause
Temperature warning symbol (thermometer) is shown on the display, operation is
not possible
Measuring tool is outside of the operating
temperature range of -10 °C to +40 °C.
Battery indicator decreasing
The battery voltage is weakening (measur-
ing is still possible).
Battery indicator empty, measurement not possible
Battery voltage too low
Error indicator and "−−−−" shown on the display
Angle between laser beam and target is too
acute.
Target surface is too reflective (e.g. mirror)
or not reflective enough (e.g. black mater-
ial), or ambient light is too bright.
The laser beam output (13) and/or recep-
tion lens (12) are fogged up (e.g. due to a
rapid temperature change).
Calculated value is larger than 999,999 or
smaller than –999,999 m
Measuring result is unreliable
Target surface reflection not distinct (e.g.
water, glass).
Laser beam output (13) and/or reception
lens (12) are covered.
Measurement result implausible
An incorrect reference level has been set
Bosch Power Tools
Remedy
Wait until the measuring tool has reached
operating temperature
Change the batteries or battery pack
Change the batteries or battery pack
Increase the angle between the laser beam
and the target
Use the laser target plate (16) (accessory)
Dry the laser beam output (13) and/or re-
ception lens (12) with a soft cloth
Divide the calculation into intermediate
2 3
/m . steps
Cover the target surface
Keep the laser beam output (13) and/or re-
ception lens (12) clear
Select a reference level that is appropriate
for the measurement
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1 609 92A 4NV | (26.10.2018)