STONEX R25LR - 10 Check and Adjustment; The Instrument Constant

Stonex R25/R25LR Total Station - User Manual 105
10. Check and adjustment
10.1. The instrument constant
I. Check
It is suggested to observe and compare the instrument with a testing baseline which is set on stable ground with a
particular accuracy, though error is not generally included in the instrument constant. If the testing line is unavailable,
you can select a flat place and set up the instrument and a target at the same height.
1. Select a point B on the approximately horizontal line AC with about 100 meters long. Measure the distances
of lines AB, AC and BC.
2. The instrument constant can be calculated:
      
3. Repeat steps 1 and 2 ten times, and get the average value for instrument constant, if the average value is
within ±3mm, adjustment is unnecessary.
4. If the difference is over ±3mm after the preceding operations, it is necessary to reset the instrument constant.
II. Adjustment
If it is necessary to reset the instrument constant, please contact STONEX service representative to perform that.
A
B
C
AB
BC
AC