STONEX R2
Fig.5 when the shadow is empty, the laser beam is OFF.
Fig.6 when the shadow is full, then the laser beam is Lightest.
13.9 INSTRUMENT CONSTANT (K)
Instrument constant has been checked up and adjusted in the factory, K=0. It seldom
changes and it is suggested to check one or two times every year. The inspection should
be made on the base line, also can be made according to the following method.
Check
1. Mount and level the instrument on Point A at a plain field. Use the vertical hair to mark
Point B and Point C with the distance of 50m on the same line, and set the reflector
accurately.
2. After setting temperature and air pressure, measure the horizontal distance of AB and
AC accurately.
3. Set the instrument on Point B and center it accurately, measure the Horizontal Distance
of BC accurately.
4. Then the Instrument Constant can be obtained:
K＝AC－(AB＋BC)
K should be near to 0, If ｜K｜＞5mm, the instrument should be strictly inspected in the
standard baseline site, and adjusted according to the inspection value.
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