Hilti PRA 30 Mode D'emploi page 14

5 Before use
5.1 Inserting the batteries
CAUTION
Do not use damaged batteries.
6 Operation
6.1 Switching the tool off and on
Press the on/off button.
6.2 Working with the tool
The PRA 30 / 31 laser receiver can be used at distances
(radiuses) of up to 200 m (650 ft). The laser beam is
indicated visually and by an audible signal.
6.2.1 Using the laser receiver as a hand-held tool
1. Press the on/off button.
2. Hold the PRA 30 / 31 directly in the plane of the
rotating laser beam.
The laser beam is indicated by visual and audible
signals.
6.2.2 Working with the laser receiver in the PRA 80
receiver holder 2
1. Open the catch on the PRA 80.
2. Insert the PRA 30 / 31 laser receiver in the PRA 80
laser receiver holder.
3. Close the catch on the PRA 80.
4. Switch the laser receiver on by pressing the on / off
button.
5. Rotate the grip to bring it into the open position.
6. Secure the PRA 80 receiver holder on the telescopic
staff or leveling staff by turning the rotating grip.
7. Hold the PRA 30 / 31 with the receiving window
directly in the plane of the rotating laser beam.
The laser beam is indicated by visual and audible
signals.
DANGER
Do not mix old and new batteries. Do not mix batteries
of different makes or types.
NOTE
Only batteries recommended by Hilti may be used to
power the tool.
6.2.3 Working with the PRA 81 3
1. Open the locking mechanism on the PRA 81.
2. Insert the PRA 30 / 31 laser receiver in the PRA 81
height transfer device.
3. Close the locking mechanism on the PRA 81.
4. Switch the laser receiver on by pressing the on / off
button.
5. Hold the PRA 30 / 31 with the receiving window
directly 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
offset distance.
6.2.4 Menu options
When switching the PRA 30 / 31 on, press and hold the
on / off button for two seconds.
The menu is then shown in the display.
Use the "units" button to switch between metric and
imperial units.
Use the "volume" button to assign the higher-pitched
signal to the upper or lower area of the receiving window.
To save the settings, switch the PRA 30 / PRA 31 off.
6.2.5 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).
6.2.6 Setting the volume of the audible signal
The tool is set to "normal" volume when switched on.
The volume can be adjusted from "normal" to "loud" by
pressing the audible signal button. Press the button again
to switch the signal off and press it once more to set the
signal to "quiet".
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