Bosch Professional GLM 50 C Original Instructions Manual page 24

24 | English
inclination. Turn the measuring tool by 180° and measure the inclination again. The dif-
ference between the displayed values must not exceed 0.3°.
In the event of larger deviations, you have to recalibrate the measuring tool. To do so, se-
lect in the settings. Follow the instructions on the display.
We recommend that you perform an accuracy check and if necessary a calibration of the
measuring tool after extreme temperature variations and after impact to the tool. After a
temperature variation, the measuring tool must adjust to the ambient temperature for a
while before calibration is performed.
Accuracy Check of the Distance Measurement
You can check the accuracy of the measuring tool as follows:
– Choose a measuring section of approx. 3–10 m in length that is permanently un-
changed, the exact length of which is known to you (e.g. room width, door opening).
The measurement should be taken under favourable conditions, i.e. the measuring
section should be indoors and the target surface for the measurement should be
smooth and reflect well.
– Measure the section ten times in succession.
The deviation of the individual measurements from the mean value must not exceed ±
4 mm over the entire measuring section in favourable conditions. Record the measure-
ments in order to be able to compare the accuracy at a later date.
Working with the tripod (accessory)
The use of a tripod is particularly necessary for larger distances. Place the measuring tool
with the 1/4" thread (13) on the quick-release plate of the tripod (19) or a conventional
camera tripod. Tighten it using the locking screw of the quick-release plate.
Set the reference level for measurements with a tripod by pressing the button (4) ac-
cordingly (thread reference level).
Error message
If a measurement cannot be performed correctly, the "Error" message appears in the dis-
play. Switch the measuring tool off and back on, and start the measurement again.
The measuring tool monitors correct functioning in every measure-
ment. If a defect is detected, the display will indicate only the symbol
shown opposite and the measuring tool switches itself off. In this
case, have the measuring tool checked by an after-sales service agent
for Bosch power tools.
1 609 92A 5E3 | (30.03.2020) Bosch Power Tools