Spectra Precision Laser HV302 Guía De Uso página 29

CALIBRATION
Checking Calibration of the Y- and X-Axes
1. Set up the laser 30 m (100 ft) from a wall and allow it to level.
2. Allow the unit to warm up for 20 minutes.
3. Raise/lower the receiver until you get an on-grade reading for the
+Y axis. Using the on-grade marking notch as a reference, make
a mark on the wall.
Note: For increased precision, use the fine-sensitivity
setting (1.5 mm/ 1/16 in.) on the receiver.
4. Rotate the laser 180° (-Y axis toward the wall) and allow the laser
to re-level.
5. Raise/lower the receiver until you get an on-grade reading for the
–Y/axis. Using the on-grade marking notch as a reference, make
a mark on the wall.
6. Measure the difference between the two marks. If they differ
more than 3 mm at 30 m (1/8 inch at 100 feet), the laser needs
calibrating.
7. After checking the Y-axis, rotate the laser 90°. Repeat the above
starting with the + X axis facing the wall.
Checking Calibration of the Z-(vertical) Axis
To check vertical calibration, you need a plumb bob with at least 10m (30ft) of string.
1. Suspend the plumb bob in front of a house i.e., attached to a window frame whose window height is at
least 10m (30ft).
2. Set up the laser in vertical so that the laser beam strikes the receiver's on-grade position at the top of the
string.
3. Look for any deviation using the receiver from the top of the string to the bottom of it. If the deviation is
more than 1mm (<1/16 in.), the vertical axis needs calibrating.
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