Troubleshooting - Hilti PD 42 Mode D'emploi

may carry out the inspection and testing of the PD 42 laser
range meter yourself (see ISO 17123-4: Field Process for
Accuracy Examination of Geodetic Instruments: Part 6,
Close-range Opto-electrical Range Meters).
1. Select a readily accessible measuring distance of a
known length (approx. 1 to 5 meters / 3 to 15 feet)
which does not change over time and measure the
same distance 10 times.
en
2. Determine the mean deviation from the known dis-
tance. This value should be within the specified
accuracy tolerance for the tool.
3. Keep a record of this value and note the date when
the next test is due.
Repeat this test at regular intervals as well as before
and after important measuring tasks.
Apply a test and inspection confirmation sticker to
the PD 42 and keep a record of the entire monitoring,
test and inspection procedure and the results.
Please refer to the technical data contained in the
operating instructions and the information concern-
ing measuring accuracy.

9 Troubleshooting

Fault
The tool can't be switched on.
No distances displayed by the
tool.
Frequent error messages or the
tool doesn't measure.
Measuring reference not set to
the spike.
Measuring reference not set to
the extension.
No result obtained using Py-
thagoras function.
38
8.4.2 Adjustment
To ensure that the laser range meter is adjusted correctly,
we recommend that it is returned to a Hilti Service Center
for calibration. Accurate adjustment of the tool will be
confirmed by a calibration certificate.
8.4.3 Hilti calibration service
We recommend that the tool is checked by the Hilti cal-
ibration service at regular intervals in order to verify its
reliability in accordance with standards and legal require-
ments.
Use can be made of the Hilti calibration service at any
time, but checking at least once a year is recommended.
The calibration service provides confirmation that the
tool is in conformance, on the day it is tested, with the
specifications given in the operating instructions.
The tool will be readjusted if deviations from the man-
ufacturer's specification are found. After checking and
adjustment, a calibration sticker applied to the tool and
a calibration certificate provide written verification that
the tool operates in accordance with the manufacturer's
specification.
Calibration certificates are always required by companies
certified according to ISO 900x.
Your local Hilti Center or representative will be pleased
to provide further information.
Possible cause
The batteries are exhausted.
Incorrect battery polarity.
The button is faulty.
"Measure" button was not pressed.
Faulty display.
The target surface is too brightly lit by
the sun.
The target surface is too shiny.
The target surface is too dark.
Bright sunlight towards the tool.
The spike is not folded out fully.
The spike is faulty.
The measuring extension is not
screwed in fully.
Dirt or foreign matter in the threaded
bush.
A distance is missing.
The difference between the distances
is insufficient.
Remedy
Replace the batteries.
Insert the batteries correctly and
close the battery compartment cover.
Return the tool to Hilti for repair.
Press the "Measure" button.
Return the tool to Hilti for repair.
Measure from the other direction –
sun from behind.
Take measurements from less shiny
surfaces.
Use the PDA 50/ PDA 51/ PDA 52
target plate.
Use the PDA 50/ PDA 51/ PDA 52
target plate.
Fold the spike out fully.
Return the tool to Hilti for repair.
Screw the measuring extension in
fully.
Clean the threaded bush.
Measure the missing distance(s).
The distance to be calculated should
be greater than ¹/₄ of the distances
measured.