Troubleshooting - Causes And Corrective Measures - Bosch GLM 30 Original Instructions Manual

OBJ_BUCH-2004-004.book Page 24 Monday, April 28, 2014 11:36 AM
24 | English
Also, air layers with varying temperatures or indirectly received reflections can affect
the measured value.
Accuracy Check of the Distance Measurement
The accuracy of the measuring tool can be checked as follows:
– Select a permanently unchangeable measuring section with a length of approx. 3
to 10 metres; its length must be precisely known (e.g. the width of a room or a door
opening). The measurement should be carried out under favourable conditions,
meaning, the measuring distance must be indoors and the target surface for the
measurement must be smooth and reflect well.
– Measure the distance 10 times after another.
The deviation of the individual measurements from the average 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.
Troubleshooting – Causes and Corrective Measures
Cause
Temperature warning indicator (g) flashing; measurement not possible
The measuring tool is outside the operat-
ing temperature range of –10 °C to
+45 °C.
"Error" indication in the display
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 8 or the reception
lens 7 are misted up (e.g. due to a rapid
temperature change).
The calculated auto-sum is greater than
99999 m.
Measuring result not plausible
The target surface does not reflect
correctly (e.g. water, glass).
The laser beam outlet 8 or the reception
lens 7 are covered.
Obstruction in path of laser beam
1 609 92A 0LG | (28.4.14)
Corrective Measure
Wait until the measuring tool has reached
the operating temperature
Work with the laser target plate 9
(accessory)
Wipe the laser beam outlet 8 and/or the
reception lens 7 dry using a soft cloth
Divide calculation into intermediate steps
Cover off the target surface
Make sure that the laser beam outlet 8 or
the reception lens 7 are unobstructed
Laser point must be completely on target
surface.
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