Care And Maintenance - Hilti PRE 3 Operating Instructions Manual

7. Hold the PRA 30 with the receiving window in the
plane of the rotating laser beam.
The laser beam is indicated by visual and audible
signals.
7.2.3 Working with the PRA 81 height transfer
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1. Open the catch on the PRA 81.
2. Place the PRA 30 laser receiver in the PRA 81 height
transfer device.
3. Close the catch on the PRA 81.
4. Switch the laser receiver on by pressing the on / off
button.
5. Hold the PRA 30 with the receiving window in the
plane of the rotating laser beam.
The laser beam is indicated by visual and audible
signals.
6. Use the measuring tape to measure the desired
distance.
7.2.4 Menu options
Press the on / off button for two seconds when switching
on.
The menu then appears in the display.
Use the measuring units button to select metric or imper-
ial measuring units.
Use the volume button to assign the high-pitched signal
to the upper or lower area of the receiving window.
To save the settings, switch the PRA 30 off.

8 Care and maintenance

8.1 Cleaning and drying
1. Blow dust off the laser exit window.
2. Do not touch the laser exit apertures 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
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 Care of the Li-ion battery
Avoid ingress of moisture.
Charge the battery fully before using it for the first time.
In order to achieve maximum battery life, stop discharging
the battery as soon as a significant drop in performance
is noticed.
7.2.5 Setting the measuring unit
The "units" button can be used to set the desired meas-
uring unit according to the country of use (mm / cm / off)
or (¹⁄₈in / ¹⁄₁₆in / off).
7.2.6 Setting the volume of the audible signal
When the receiver is switched on, the volume is set to
"normal". The volume can be changed form "normal" to
"loud" by pressing the "audible signal" button. Pressing
the button again switches the volume to "off" and a
further press of the button switches it to "quiet".
7.3 Deactivating the shock warning system
1. Press the on / off button on the tool for at least 4
seconds when switching on.
2. The shock warning LED lights constantly, indicating
that the function has been deactivated.
3. Release the on / off button.
4. To return to the standard operating modus, the tool
must be switched off and then restarted.
7.4 Switching on in manual mode
1. To activate the inclined plane function, press the on
/ off button on the tool for 8 seconds when switching
on.
2. After 8 seconds, the inclined plane LED lights con-
stantly indicating that the inclined plane function is
activated.
3. Release the button.
4. The horizontal plane is then no longer monitored.
5. To return to the standard operating modus, the tool
must be switched off and then restarted.
NOTE
If use of the tool continues, further battery discharge will
be stopped automatically before the battery cells suffer
damage. The tool switches itself off.
Charge the battery with the Hilti charger approved for use
with Li-ion batteries.
NOTE
- A conditioning charge (as is required with NiCd or
NiMH batteries) is not necessary.
- Interruption of the charging procedure has no negative
effect on battery life.
- Charging can be started at any time with no negative
effect on battery life. There is no memory effect (as
with NiCd or NiMH batteries).
- For best results, batteries should be stored fully
charged in a cool dry place. Avoid charging the battery
in places subject to high ambient temperatures (e.g. at
a window) as this has an adverse effect on battery life
and increases the rate of self-discharge.
en
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