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2018-04-01
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Robert Bosch GmbH
Product Description and Specifications | GLM 20 | 15
en
3.4
Technical Data
Digital Laser Measure
GLM 20
Article number
3 601 K72 E..
Measuring range (typical)
0.15–20 m
A)
Measuring accuracy (typical)
±3.0mm
B)
Lowest indication unit
1mm
Measuring duration
– typical
– maximal
0.5 s
4 s
Operating temperature
– 10 °C ... +40 °C
Storage temperature
– 20 °C ... +70 °C
Relative air humidity, max.
90 %
Laser class
2
Laser type
635 nm, <1mW
Laser beam diameter (at 25 °C) approx.
– at 10m distance
– at 20m distance
9mm
18mm
Batteries
2 x 1.5 V LR03 (AAA)
Battery service life in measuring opera-
tion, approx.
5 h
Weight according to EPTA-Procedure
01:2014
0.13 kg
Dimensions
100 x 36 x 23 mm
A)
The working range increases depending on how well the laser
light is reflected from the surface of the target (scattered, not
reflective) and with increased brightness of the laser point to
the ambient light intensity (interior spaces, twilight). In unfa-
vourable conditions, e.g., with extreme interior illumination or a
badly reflecting surface, the measuring range may be limited.
B)
In unfavourable conditions, e.g., with extreme interior illumina-
tion, badly reflecting surface or the room temperature deviating
heavily from 25 °C, the maximum deviation can be up to ±7mm
per 15 m. In favourable conditions, a deviation influence of
±0.05 mm/m must be taken into account.
The measuring tool can be clearly identified with the
serial number 5 on the type plate.
4. Assembly
4.1
Inserting/Replacing the Batteries
Alkali-manganese batteries are recommended for the
measuring tool.
To open the battery lid 3, press the latch 4 in the direc-
tion of the arrow and remove the battery lid. Insert the
batteries. When inserting, pay attention to the correct
polarity according to the representation on the inside of
the battery compartment.
When the battery symbol
appears for the first
time on the display, measurements are still possible for
approx. 15 minutes. When the battery symbol flashes,
the batteries must be replaced; measurements are no
longer possible.
Replace all batteries at the same time. Only use same-
brand batteries with the identical battery capacity.
¶
Remove the batteries from the measuring tool
when not using it for extended periods.
When stor-
ing for extended periods, the batteries can corrode
and self-discharge.