Herbert Kreitel HD 150 Manuel page 15

Error – Cause and Correction
Cause
The temperature indicator k blinks, measuring is not possible
Measurement outside the allowed
temperature range from –10 °C
(+14 °F) to +50 °C ( +122 °F).
"ERROR" Message and "------- m" in the Display
The angle between the laser beam
and the target is too acute.
The target surface reflects too
strongly (e.g. a mirror) or too weak-
ly (e.g. black material).
Ambient light is too strong
(e.g. sunlight).
The receiving lens 22 or the laser
beam exit 23 are misted over, for
example, as a result of changing
between low and high environmen-
tal temperatures.
Unreliable Measurement Results
The target surface does not reflect
clearly (e.g. water, glass).
The laser beam exit 23 or the
receiving lens 22 is soiled.
The corrective measures listed
above do not eliminate the error.
Checking the Measurement Accuracy
The accuracy of the instrument can be checked as follows:
– Select a distance that never changes that is approx. 1–10 m (3.3–
33 ft) long (e.g. room width, door opening) whose length is known ex-
actly.
– Measure this distance ten times one after the other.
The measurement error can be a maximum of ±3 mm (±1/8 in). Record
the measurements so that the accuracy can be compared at a later time.
1 609 929 E86 • (02.12) T
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The instrument monitors the correct functioning for ev-
ery measurement. If a defect is detected, only the sym-
bol blinks in the display (measurement from the
back end). Take the unit to your dealer for sending to
the Trimble Service Center.
American English–11
Correction
Wait until the allowable temperature
range is reached.
Increase the angle between the
laser beam and the target.
Use the target panel (accessory).
Use the target panel (accessory).
Wipe the receiving lens 22 or the
laser beam exit 23 dry with a soft
cloth.
Cover the target surface.
Keep the laser beam exit 23 or the
receiving lens 22 free of dirt.
Take the unit to your dealer for
sending to the Trimble Service
Center.