-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. |