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11. CHECKS AND ADJUSTMENTS
GLS-2000 is a precision instrument that requires fine adjustments. It must be inspected and adjusted
before use so that it always performs accurate measurements.
• After long-term storage or transporting the instrument over a long period of time, or if it is thought that a
strong impact has been applied to this instrument during the operation, perform inspection and
adjustment with extra care.
• Inspect and adjust this instrument in an environment where this instrument is securely placed. To
perform an accurate measurement, inspect and adjust this instrument regularly.
If the bubble in the circular level is deviated during the leveling, follow the below steps to adjust.
PROCEDURE Checking and adjusting
1. Remove the tribrach from the
instrument
.
2. Install the adjusted instrument, such as a total
station, and a theodolite, to the tribrach.
3. Level the instrument while looking at
the plate level. If the bubble in the
circular level of the tribrach is not
deviated from the center of the circular
level, no leveling is required.
4. If the bubble is deviated from the center
of the circular level, rotate three circular level
adjustment screws using the adjustment pin
and shift the bubble to the center.
11.1 Circular Level Adjustment
Plate level
Instrument
Circular level
Circular level
adjustment screws
Circular level
Circular level
adjustment screws