Sokkia CX-52 Operator's Manual page 265

4. Precisely measure the horizontal
distances CA and CB 10 times
each and calculate the average
value for each distance.
5. Calculate the additive distance
constant K as follows.
K = AB - (CA+CB)
6. Repeat steps 1 to 5 two or three
times.
If the additive distance constant K
is within ±3mm even once,
adjustment is unnecessary.
If it always exceeds this range,
have our service representative
perform an adjustment.
33. CHECKS AND ADJUSTMENTS
257