Hilti Pra 90, Operating Instructions Manual

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pairing is established which is essential for the automatic
alignment of the laser plane.
Press the “ON/OFF” buttons on the PRA 35 and on the
tripod simultaneously for at least 3 seconds.
Successful pairing is briefly shown by a chain appearing
on the PRA 35 display and all LEDs flash on the PRA 90.
After indicating the pairing, both appliances switch off
automatically.
7.3.2 Switching on the PRA 90, PR 35 and
PRA 35
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Press each of the ON/OFF buttons on the PRA 90, PR 35
and PRA 35.
The rotating laser (including tripod) is shown on the
display of the PRA 35 remote control unit/laser receiver.
If PRA 35 and PRA 90 are in radio contact, a wave
appears between PRA 35 and the PRA 90 in the PRA 35
display.
If PRA 35 and PRA 90 are not in radio contact, a warning
triangle appears in the PRA 35 display, either between
PR 35 and PRA 35 or between RRA 90 and PRA 35.
7.3.3 Manual and automatic alignment of the laser
plane
NOTE
In order to achieve a perfectly satisfactory and maximum
radio range, always align the control panel of the tripod
towards the PRA 35 remote control unit/laser receiver.
7.3.3.1 Automatic alignment
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1. The keypad on the front of the PRA 35 must have
been enabled. This is indicated by an open key
symbol on the display of the front. If the keypad is
not enabled, press twice quickly in succession on
the key locking button on the PRA 35.
The front side of the PRA 35 is unlocked.
2. Hold the receiver side of the PRA 35 remote control
unit/laser receiver at the desired height and towards
the PRA 90 control panel and, during the alignment
process, hold the PRA 35 still and in clear view
between PRA 35 and PR 35
3. Double click the “Automatic alignment” button on
the PRA 35 remote control unit/laser receiver.
The laser plane alignment process now starts and
the tripod travels upwards or downwards. During
this time, an acoustic signal sounds continuously.
The alignment procedure can be canceled by simply
double clicking. As soon as the laser beam hits
the receiver field of the PRA 35 remote control
unit/laser receiver, the beam is moved towards the
marking notch (reference plane). After the position
has been reached and the PR 35 rotating laser
has been leveled, a long tone signal sounds which
indicates that the process is complete. In addition,
the automatic alignment icon is no longer shown.
You can now check the height on the display.
4. Check the settings on the display.
5. Remove the PRA 35.
NOTE If the automatic alignment process was not
successful, short signals sound and the automatic
alignment icon goes out.
7.3.3.2 Monitoring
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When working with the tripod for a prolonged period,
it is recommended that the monitoring mode should be
switched on.
1. The keypad on the front of the PRA 35 must have
been enabled. This is indicated by an open key
symbol on the display on the front. If the keypad is
not enabled, press twice quickly in succession on
the key locking button on the PRA 35.
The front side of the PRA 35 is unlocked.
2. Fit the receiver side of the remote control unit/laser
receiver securely at the desired target height and
towards the PRA 90 control panel and, during the
alignment process, hold the PRA 35 still and in clear
view between PRA 35 and PR 35.
3. Double click the “Monitoring mode” button on the
PRA 35 remote control unit/laser receiver.
The laser plane alignment process now starts and
the tripod travels upwards or downwards. During
this time, an acoustic signal sounds continuously.
As soon as the laser beam hits the receiver field of
the PRA 35 remote control unit/laser receiver, the
beam is moved towards the marking notch (refer-
ence plane). After the position has been reached
(marking notch found), a long tone signal sounds
which indicates that the process is complete.
4. Check the height on the display.
NOTE The PRA 35 must not be removed in order
that the alignment process can be repeated, auto-
matically and of its own accord.
NOTE If the automatic alignment process was not
successful, short signals sound and a warning tri-
angle appears in the display.
7.3.3.3 Manual alignment
6
1. The keypad on the rear of the PRA 35 must have
been enabled. This is indicated by an open key
symbol on the display on the rear. If the keypad is
not enabled, press twice quickly in succession on
the key locking button on the PRA 35.
The rear side of the PRA 35 is unlocked.
2. Press the up/down arrow buttons on the PRA 35
remote control unit/laser receiver.
The tripod travels upwards or downwards.
3. Check the settings on the display.
This function can only be used in the horizontal
mode of the PR 35 rotating laser and if the PR 35 is
switched on.
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Printed: 07.07.2013 | Doc-Nr: PUB / 5136588 / 000 / 00