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7. Measuring equipment inspection
7. Measuring equipment inspection
Measuring equipment inspection of the PD
20 for users certified according to ISO 900...
You may carry out the measuring equipment
inspection required by ISO 900... on the PD 20
linear measuring device yourself.
To do this, select a measuring distance which
remains constant over a period of time and
which is easily accessible. It should have a
known length of approx. 1 to 5 m (e.g. a window
opening or the width of a room) and 10
measurements should be made.
Determine the deviation of the readings from the
nominal measuring distance and calculate the
standard deviation on this basis.
Make a note of this value and the date or time
for the next inspection.
Repeat these verification measurements at
regular intervals as well as before and after
important measuring tasks.
Apply a measuring equipment inspection sticker
to the PD 20 and document the entire inspection
procedure.
Your PD 20 conforms to the specified accuracy
if the standard deviation remains less than or
equal to 5mm.
A PD 20 which has been tested / inspected over
the test distance will operate with the accuracy
specified in the operating instructions over the
entire specified length and temperature range.
Please refer to the technical data contained in
the operating instructions and to the explanation
of the accuracy values.
Recommendation
Test the tool, or have it tested, once a year.
Contact your Hilti representative for further
information. The tool can also be tested at one
of our repair / service centres.
Temperature too high
(>+50
°
C), in
tracking mode (>+45
°
C)
Solution
Allow the tool to cool.
Temperature too low
(>-10
°
C)
Solution
Warm the tool.
Unfavourable reception conditions
Solution
- Observe max. measuring distance
(>300 mm)
- Clean the lens
- Aim the beam at a different surface
(target plate)
Excessive back light at the target
point
Solution
Shade the target point from
background light.
General hardware fault
Solution
Contact a service centre.
Batteries almost discharged
Solution
Insert new batteries.
6. Symbols displayed
6. Symbols displayed
