-Rotate the azimuth dial to align the base reference value with the zero wheel. Now the rangefinder is aligned with the base line within 30.00 mils;

-Turn the clamping handle to lock the azimuth dial in the determined position.

7.5.2.To orient the rangefinder by using the reference directional angle, proceed as follows:

- Aim the range finder to the reference point, which directional angle is known;

- Rotate the azimuth dial to set the reference directional angle; - Turn the clamping handle to lock the azimuth dial in the

determined position.

With the rangefinder oriented, the measurements are taken from the location point relative to the directional angle of the object (reference object).

7.5.3.For the magnetic orientation of the rangefinder, proceed as follows:

- Unscrew the plunger knob all the way out to release the magnetic needle of the compass;

- Turn the AI around the vertical axis to obtain precise alignment of the index mark of the circle with the magnetic needle;

Rotate the azimuth dial to set the magnetic azimuth index correction.

9. SERVICEABILITY TEST

The principal tests to be performed on the range finder are listed below.

 

Table 9.1

Items to check, test procedure

Technical requirement

Rangefinder completeness

Range finder is complete with all

 

components listed in Section 5

Rangefinder exterior

Exterior surfaces are clean and free

 

from cracks, dents and rust

Exterior of range finder optical

Optical surfaces are free from

parts (to be checked visually).

cracks, scratches, chips, dirt,

Make sure that the unit is off!

grease stains (exterior) and

 

condensed moisture (interior)

Dehydrator case of range finder

Silica gel is bluish in colour

(to be checked visually)

 

Battery voltage. Proceed as

The red Low Battery indicator is

directed under 7.3.1

not lit in the left eyepiece of the

 

rangefinder

Illumination of range finder

Binocular reticle is illuminated

Binocular reticle. Check that the

 

front cover of the rangefinder is

 

closed and set ILLUM. selector

 

switch to ON

 

Functioning of range finder.

Measured results are within 5 m of

Proceed as directed under 7.3.2.

predetermined range

Setting of zero elevation reference

ER “O” error determined for

(ER “0”). Proceed as directed

vertical angle scale should be

under 7.6.1.

calculated for the elevation

 

measurements.

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Newcon Optik LRB 20000 operation manual Serviceability Test