Accuracy Check Of The Distance Measurement; Working With The Tripod (Accessory) - Bosch GLM 50 C Operating/Safety Instructions Manual

in figure G. Place the laser measure on a table or sur-
face and measure the grade. Turn the laser measure
180° and measure the grade again. The difference of
the indicated reading may not exceed 0.3°. If the devi-
ation is greater, the laser measure must be recalibrat-
ed. Select . Follow the directions on the display.
After severe temperature changes or impacts, we rec-
ommend to check the accuracy and, if required, to
recalibrate the laser measure.
change, the laser measure must adjust to the new tem-
perature before calibrating.

Accuracy Check of the Distance Measurement

The accuracy of the distance measurement can be
checked as follows:
- Select a permanent measuring section with a
length of approx. 10 ft to 33 ft (3 m to 10 m); its
length must be precisely known (e.g. the width of a
room or a door opening). The measuring distance
must be indoors; the target surface for the mea-
surement must be smooth and reflect well.
- Measure the distance 10 times in a row.
The deviation of the individual measurements from the
mean value must not exceed ± 5/32" (± 4 mm). Log
the measurements so that you can compare their ac-
curacy at a later point in time.

Working with the Tripod (Accessory)

The tripod is particularly useful for measuring great-
er distances. Position the laser measure with 1/4"
thread 13 onto the quick-change plate of a tripod 20.
Tighten the laser measure with the locking screw of
the quick-change plate.
Set the corresponding reference point for the mea-
surement with a tripod by pushing the measuring ref-
erence button 4 and using the plus button 3 [ ] and
minus button 8 [ ] to scroll until the highlighted box
appears over the .
-36-
After a temperature