Safety Notes; Accuracy Check - geo-FENNEL FL 40-PowerCross SP Mode D'emploi

SAFETY NOTES

ACCURACY CHECK

Set up instrument in the middle of two walls which are about 5 m apart. Mark visible laser cross on
one wall. Turn unit to opposite wall and mark laser cross.
Repeat measurements with distance of about 0,6 m to one wall and about 4,4 m to second wall.
Deviation between two measurements taken from the centre and two measurements taken at 0,6 m
and 4,4 m must not exceed 3 mm.
Testing accuracy of horizontal line (end to end)
Set up instrument about 5 m from a wall. Mark laser cross on wall. Turn instrument until the laser
cross has moved about 2,5 m to the left side and check if horizontal line is within ± 2 mm of laser
cross marked on wall. Repeat measurement by turning instrument to the right side
Testing accuracy of vertical line (end to end)
Set up instrument about 5 m from a wall. Fix a plumb line of 2,5 m length to the wall, using a plumb
bob. Bring laser line into coincidence with the plumb line. Deviation between laser line and plummet
cord from top to bottom must not exceed ± 1,5 mm.
SPECIFIC REASONS FOR ERRONEOUS MEASURING RESULTS
Measurements through glass or plastic windows; dirty laser emitting windows; after instrument has
been dropped or hit. Please check accuracy.
Large fluctuation of temperature: If instrument will be used in cold areas after it has been stored in
Press button H-V once again:
• the ON/OFF LED is blinking
• the vertical and the horizontal laser line are switched on =
laser cross
• the self-levelling mode is de-activated (TILT mode); if the
instrument is tilted. (out of compensator range) thelaser
lines are not blinking
• now the instrument can be used in slope mode
Press button H-V again:
• the ON/OFF LED is off
• the instrument is now off
EN
G
15