Hilti PR 25 Operating Instructions Manual page 12

-NOTE- If an error is displayed
Please check that the PRA 25 is positioned within the
inclination range (+/– 5°) and that no obstacles are
located between the rotating laser tool and the laser
detector.
After successfully setting to the zero point, take care to
ensure that the line of sight between the two devices is
not interrupted.
7.2.9 Pairing
It is possible to configure the PR 25 and the PRA 25 as
a pair. When the two devices are paired, the rotating laser
and the detector are assigned to each other. The rotat-
ing laser then receives commands only from its "own"
detector/remote control unit. The devices can be paired
by pressing and holding down the on/off keys on both
devices simultaneously.
-NOTE-
The PR 25 and PRA 25 are not paired when supplied.
Each unpaired rotating laser receives commands from
any unpaired detector/remote control.
Pairing procedure:
– The devices can be paired by pressing and holding
down the on/off keys on the PR 25 and PRA 25 simul-
taneously, as previously described, for more than 3
seconds. Successful pairing is confirmed by an audi-
ble signal emitted by the PRA 25 and by the LEDs on
the PR 25 blinking twice.
Cancelling pairing:
– Pairing can be cancelled by pressing and holding down
the on/off keys for more than 3 seconds. Cancellation
of pairing can only be successful when the on/off keys
on the PR 25 and PRA 25 are not pressed simultane-
ously. Successful cancellation of pairing is confirmed
by the PRA 25 by the emission of an audible signal
and by the symbol "!" displayed. The PR 25 confirms
cancellation of pairing by causing all LEDs to blink.
7.2.10 Working with the target plate
The target plate improves visibility of the laser beam.
The target plate for the PR 25 is particularly useful in
bright conditions or wherever better visibility of the laser
beam is required.
7.2.11 Working with the laser detector
Please refer to the PRA 25 operating instructions for
information about the laser detector.
7.2.12 Continuing work in manual mode after a
restart
In order to continue working in manual mode after a
restart, it is necessary to press one of the "inclination/
direction" keys on the PR 25 within 3 seconds.
7.2.13 Returning to standard mode
To return to standard mode, switch the tool off and then
restart it.
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