Newcon Optik LRB 20000 Maintenance, Items to check, test procedure Technical requirement

	Table 9.1, continued
Items to check, test procedure	Technical requirement
Sensitivity, indexing uniformity and	Send the unit for repair if even a
balance of the magnetic needle.	single requirement of 8.6.2. is not
Proceed as directed under 7.6.2.	satisfied.
AI azimuth and elevation adjustment	If necessary, tighten bushings on
knobs must not be loose.	knob end facets.

10. MAINTENANCE

10.1.Maintenance Organization and Procedure. General Instructions.

10.1.1.This Section deals with the maintenance services prescribed for the range finder, excepting the battery servicing procedure. For the instructions on the battery service procedure, refer to Section 15.

10.1.2.The range finder is serviced to ensure its operability and readiness for operation.

The rangefinder is subject to timely full-scope servicing, unless premature wear should occur resulting in shorter periods between repairs.

10.1.3.While preparing for and carrying out the maintenance services, observe the safety precautions as outlined in Section 6.

7.4.To use the AI and tripod for observation, proceed as follows: - Arrange the tripod on selected site so that one leg aligns with

the ranging direction;

- Extend the telescopic legs at the desired length to achieve maximum convenience for the observation.

In case you do not use the tripod proceed as follows: - Unscrew the ball-mount seat from the tripod base;

- Fit the stay block on to the wooden object and tighten it.

- Install and level the AI using the ball-mount by turning AI in ball-mount seat and putting the level bubble into the centre of the ring marks.

- Secure the AI by clamp.

- Sliding the rangefinder along the AI bracket guides, fit the AI clamp into the T-shaped opening in the rangefinder bracket, and turn the handle of the clamp to lock the rangefinder in this position.

7.5.Use the AI compass or the reference directional angle to align the rangefinder with the base line.

7.5.1.To align the range finder with the base line, proceed as follows:

- Aim the rangefinder to the reference point;

- Find the base reference (BR) from the formula:

BR = α base – α ref ± 30.00’

where α base is the base line directional angle;

α ref is the directional angle of the given reference line.