Prepared By: Tim Wojo
Revision - Date: 0 – 03232009
40-6537 Service Manual
3.1.2.1. Oblique error
This type of error occurs when leveling compensator does not hang straight (as illustrated to the right),
i.e. is not properly balanced. When the laser spins, it actually rotates on a plain that is not level, i.e.
perfectly horizontal whose rotating axis is not plumb. So value A on the left target does not has the
same sign as that on the right target, like, A
0°
=+2, A
180°
= -2. A number of factors can cause this
situation to exist.
Normal use – Depending upon how careful the user is with the instrument, finely tuned adjustments can be altered by
very large changes in temperature, vibrations (due to handling and transportation)
Shock – The instrument was dropped and components of the leveling system (gimbal, compensator weight and shaft.,
screw adjustments) have either been damaged or came out of alignment. If defective components are present, they will
need to be repaired or replaced prior to the calibration procedures defined below being initiated.
Depending upon the magnitude of the error (±.5mm/ or 0.0005”/in), only fine adjustments need to be made, i.e. calibration via the
remote control. Larger errors (>.5mm/m or 0.0005”/in) require coarse adjustment to get close, then fine adjustment to bring the
unit within specification. Both adjustments are defined below
Fine Adjust - Calibration via The Remote Control
If the error is within the range of ±0.5mm/m, it only needs to make calibration with the aid of remote control. The details are as
follows:
Shield key
SLOPE TI LT
+ X
- X
- Y
+ Y
SLOPE key
SLOPE up/down key
Sleep key
TILT key
CALIBRATE
Confirm key of
self-calibration
Adjust key of
self-calibration
Direction key of
self-calibration
TILT LED
Power key
Slope key
Slope-direction LED
Power LED
Slope-mode LED
TILT key
Weak battery LED
TI LT
SLOPE
X Y
SLOPE
