User's Manual

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5. Repeat step 4, check and calibrate until it meet the
requirements;
6. With the laser plummet, unbolt the laser cover, using 1 # hex
wrench to adjust the three screws, fasten one side and loosen the
other side, and adjust the laser flare to point O;
7. Put the cover back in place.
13.8 Addictive constant (K)
The instrument constant is inspected when it out, and
correct it inside the machine, make K = 0. Instrument constant
change rarely, but we suggest that check it this way for one or
two times each year. The checkout should be done in the
standard baseline, or you can take the following simple method.
Checkout
1. Choose a flat field A to set up and level the instrument ,
mark three points A、B、C in the same line ,their interval is 50m,
and set up the reflection prism accurately;
2. After setting the temperature and atmospheric pressure of
the instrument, measure the horizontal distance of ‘A B’ and
‘ AC’ accurately;
3. Place the instrument at point B then centering it
accurately to measure the horizontal distance of BC precisely;
4. Obtain the distance measurement constant of the
instrument: K= AC-(AB+BC);
K should be close to zero, if | K | > 5 mm,it should be send
to standard baseline field for strict checking. You can calibrate it
based on the checking value.
Calibration
If it turns out the instrument constant does not close to 0 but
changing after strict inspection, you need to calibrate it,and set
the instrument additive constant according to the comprehensive