Care And Maintenance; Cleaning And Drying; Hilti Calibration Service; Checking Accuracy - Hilti PRE 38 Manual De Instrucciones

8 Care and maintenance

8.1 Cleaning and drying

1. Blow dust off the laser exit window.
2. Do not touch the laser exit windows and filter with
the fingers.
3. Use only a clean, soft cloth for cleaning. If necessary,
moisten the cloth slightly with pure alcohol or a little
en
water.
NOTE Do not use any other liquids as these may
damage the plastic components.
4. Observe the temperature limits when storing your
equipment. This is particularly important in winter
/ summer if the equipment is kept inside a motor
vehicle (-25°C to +60°C).
8.2 Storage
Remove the tool from its case if it has become wet.
The tool, its carrying case and accessories should be
cleaned and dried (at maximum 40°C / 104°F). Repack
the equipment only once it is completely dry.
Check the accuracy of the equipment before it is used
after a long period of storage or transportation.
8.3 Transport
Use the Hilti toolbox or packaging of equivalent quality
for transporting or shipping your equipment.
CAUTION
Always remove the battery from the tool before ship-
ping.

8.4 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.

8.5 Checking accuracy

In order to ensure compliance with the technical spe-
cifications, the tool should be checked regularly (at least
before each major / relevant job).
28
8.6 Horizontal error
8.6.1 Checking horizontal error 19
1. Set up the PRE 38 grade laser on a tripod approx.
50 m (164 ft) from a wall.
2. Use a spirit level to ensure that the tripod head is
horizontal.
3. Align the laser so that one side is facing the wall and
then secure the laser tool on the tripod.
4. Switch the tool on and, at the same time, keep the
X/Y button pressed. The axis that blinks, X or Y, is
the one that is to be checked.
NOTE The axis to be checked can be changed by
pressing the arrow buttons. Confirm your selection
by pressing the "ENT" button.
The display shows "POSITION 1" (blinking) and, at
the same time, the tool levels itself. After completion
of automatic leveling, the laser beam switches on
and the head begins to rotate.
5. Use the laser receiver (set to maximum accuracy)
to find the position of the laser beam and mark this
height on the wall.
6. Press the "ENT" button.
The display shows "POSITION 2" (blinking).
7. Release the securing screw on the tripod, rotate the
tool through 180° and then retighten the securing
screw. Then wait a few moments until the tool has
leveled itself again.
After this, two arrow buttons are shown, the laser
beam switches on and the head begins to rotate.
8. Use the laser receiver (set to maximum accuracy)
to find the position of the laser beam and mark its
height on the wall.
If the difference in height between the two marks is
less than 5 mm, no adjustment is necessary. The
tool can be switched off and used as normal.
If adjustment is found to be necessary, please pro-
ceed as described in section 8.5.2 "Adjusting for
horizontal error".
8.6.2 Adjusting for horizontal error 20
NOTE
Before adjusting, check whether adjustment is necessary.
Please refer to section 8.6.1.
1. Adjust the laser beam so that it lies between the two
marks. Use the "up" and "down" arrow buttons to
do this.
2. Confirm this middle position by pressing the "ENT"
button.
The word "CALCULATING" then blinks in the dis-
play, indicating that the tool is calibrating itself.
Do not touch the tool while this is taking place. Wait
until "END" is shown in the display.