Manual Grade Match, Automatic Axis Alignment

2.Attach the HL750 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 for 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 and 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 HL750 display shows a flashing –GM–.

When Grade Match has been completed, the HL750 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 HL750 goes back to standard elevation indication.

Manual Grade Match

In Manual Grade Match, the beam on both axes can be adjusted to the receiver‘s on-grade position, e.g, when other receivers as the HL750 are used. The grade for the Y-axis can be adjusted with button 5/8 while button 6/7 adjust the X-axis. During Manual Grade Match a crossed vial and angle symbol appear next to the continuously changing Y- and X-axis grade value. After adjusting to the receiver’s on-grade position, press button 2 (OK) to go back to automatic mode where the final grade value will be shown for both axes.

Note: Pressing button 3 (ESC) exits Manual Grade Match and changes the unit to manual mode.

Automatic Axis Alignment

Automatic Axis Alignment mode adjusts automatically the direction the grade axis is pointing to the receiver’s location by an electronically simulation of rotating the unit on its base to match the hub. Using Axis Alignment, the laser axes can be aligned to one or two direction hubs (up to 80 m (260 ft) located on one or both axes at each side of the laser.

1.Set up the laser over the reference point.

2.Place the grade rod with the attached HL750 receiver at the desired direction hub.

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 for both axes is +/-40°).