Product Manual

13.4 Calibrating the Compensator
b
a
TSOX_141
c
ba
d
a Mechanical vertical axis of the
instrument, also called standing axis
b Plumb line
c Longitudinal component (l) of the
compensator index error
d Transversal component (t) of the
compensator index error
The compensator index errors (l, t) occur, if the vertical axis of the instrument and the plumb
line are parallel but the zero points of the compensator and the circular level do not coincide.
The calibration procedure electronically adjusts the zero point of the compensator.
A longitudinal component in direction of the telescope and a transversal component perpendicu-
lar to the telescope define the plane of the dual axis compensator of the instrument.
The longitudinal compensator index error (l) has a similar effect as the vertical index error and
effects all vertical angle readings.
The transversal compensator index error (t) is similar to the tilting axis error. The effect of this
error to the horizontal angle readings is 0 at the horizon and increases with steep sightings.
1. Select Tools from the MAIN MENU.
2. Select Calib. from the TOOLS menu.
3. Select Comp. Index.
Step Description
1. Level the instrument with the electronic level. Refer to - "Level up
with the electronic level step-by-step".
2. Press REC to measure the first face. No target has to be aimed at.
3. REC to release the measurement in the other face.
☞
If one or more errors are bigger than the predefined limits, the
procedure must be repeated. All measurements of the current run
are rejected and are not averaged with the results from previous
runs.
4. Measure the target.
The standard deviations of the determined adjustment errors can
be calculated from the second run onwards.
Compensator index error
Access
Check and adjust step-by-
step
Calibration 121