Hilti PD 42, Operating Instructions Manual, Page: 22 / 181

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.
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.
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.
9 Troubleshooting
Fault Possible cause Remedy
The tool can’t be switched on. The batteries are exhausted. Replace the batteries.
Incorrect battery polarity. Insert the batteries correctly and
close the battery compartment cover.
The button is faulty. Return the tool to Hilti for repair.
No distances displayed by the
tool.
“Measure” button was not pressed. Press the “Measure” button.
Faulty display. Return the tool to Hilti for repair.
Frequent error messages or the
tool doesn’t measure.
The target surface is too brightly lit by
the sun.
Measure from the other direction –
sun from behind.
The target surface is too shiny. Take measurements from less shiny
surfaces.
The target surface is too dark. Use the PDA 50/ PDA 51/ PDA 52
target plate.
Bright sunlight towards the tool. Use the PDA 50/ PDA 51/ PDA 52
target plate.
Measuring reference not set to
the spike.
The spike is not folded out fully. Fold the spike out fully.
The spike is faulty. Return the tool to Hilti for repair.
Measuring reference not set to
the extension.
The measuring extension is not
screwed in fully.
Screw the measuring extension in
fully.
Dirt or foreign matter in the threaded
bush.
Clean the threaded bush.
No result obtained using Py-
thagoras function.
A distance is missing. Measure the missing distance(s).
The difference between the distances
is insufficient.
The distance to be calculated should
be greater than ¹/₄ of the distances
measured.
en
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Printed: 08.07.2013 | Doc-Nr: PUB / 5070024 / 000 / 01