HAMAR LASER STEALTH Series, General Training Manual

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17
Calibrating the Level Vials
Note 1:
This procedure calibrates
only one level vial at a time
and must be repeated for the other axis.
It is very important to ensure to
level both levels
when calibrating each one. Failure to do this makes it
nearly impossible to calibrate the levels.
Note 2:
It is very important to warm up the laser for at least 30 minutes before starting this procedure.
The calibration procedure involves a series of steps to adjust the laser beam to be level to earth. Because
the leveling process is subject to so many variables, repeat the procedure to check for accuracy once the
initial readings are taken and adjustments are made. A typical sequence would be as follows:
•
Determine the Set Point and set the Pitch Axis.
• Use
the Set Point value to set the Roll Axis.
• Check both the Pitch and Roll axes. Reset the levels if necessary.
• If the levels are reset, make a final check to determine if the laser level error is acceptable.
When calibrating the precision level vials, work on a surface that is level to earth within .001 to .002 in/ft.
A surface that is 10 to 20 ft. in length is ideal. When calibrating to shorter surfaces, do so with the
readout set to the .0001 in. mode. If you are using the A-1519 or A-1520 Wireless Targets with the R-
1356 PDA or with Hamar Laser’s alignment programs, set the readout display through the software.
Figure 10 -- Laser and Target Setup for Calibrating the Precision Level Vials
Zeroing the Targets
The following sections refer frequently to “zeroing” the target. When a
target is zeroed, the readout is reset to zero at the point where the laser
beam currently hits the target cell.
When using the A-1519/A-1520 Universal Targets, this is accomplished
through the Read15/Read16 software (or through Hamar Laser’s other
alignment programs) by clicking the ZERO button, which zeroes out the
ABS (Absolute Mode) value. This reading is stored in memory and then
subtracted from all future readings. Once the target is zeroed, subsequent
readings show only the difference from the original reading in ABS Mode.