The Grade Match mode can be activated in horizontal automatic and manual mode.
In Grade Match mode, the laser can be used to measure the existing grade value between two known
elevation points (up to
150
m (
490
ft) located on one or both axes at each side of the laser
1. Set up the laser over the reference point.
2. Attach the HL
760
receiver to a grade rod. Check the laser’s elevation next to
the laser then position the receiver at the second point
WITHOUT
changing the
receiver’s elevation on the rod.
3. Use the sighting guides on the top of the laser to align the laser to the receiver.
Turn the laser on the tripod until it is roughly aligned to the
receiver’s position
(the alignment range on both axes is +/-40
°).
4. Press and release the
MENU button
at the Standard Display and
select Grade Match.
5. Select the
desired Grade Match axis
then press
button 4 to start Grade Match
.
Note:
The laser starts to search for the receiver. A flashing
receiver an angle symbol
appears at the selected axis and disappears when Grade Match has been completed.
While the laser is searching and adjusting the beam to the on-grade position,
the HL
760
display shows a flashing
–GM–.
When Grade Match has been completed,
the HL
760
goes back to the standard elevation display. The remote control as well as the laser
will display the final measured grade value.
Note
: If Grade match can’t be completed by checking the limits, the laser comes with an
Error message (Grade Match has Failed) which can be deleted with
button 4 (OK).
The HL
760
goes back to standard elevation indication.
Automatic Grade Match mode
