Bosch Professional GLM 30 Manual Original página 23

OBJ_BUCH-2004-003.book Page 23 Wednesday, November 13, 2013 4:20 PM
Influence Effects on the Measuring Result
Due to physical effects, faulty measurements cannot be excluded when measuring on
different surfaces. Included here are:
– Transparent surfaces (e.g., glass, water),
– Reflecting surfaces (e.g., polished metal, glass),
– Porous surfaces (e.g. insulation materials),
– Structured surfaces (e.g., roughcast, natural stone).
If required, use the laser target plate 9 (accessory) on these surfaces.
Furthermore, faulty measurements are also possible when sighting inclined target
surfaces.
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 meas-
urements 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.
Bosch Power Tools
English | 23
Corrective Measure
Wait until the measuring tool has reached
the operating temperature
Work with the laser target plate 9 (acces-
sory)
2 609 141 073 | (13.11.13)