Plot the target on the map using the obtained rectangular coordinates.
8.9.When using the rangefinder under the conditions of insufficient light, set the ILLUM. selector switch to ON.
8.10.If a target is located against an intense background (bright sky, sunlit snow or sand, etc.), the range display may indicate as if more than one target is caught in the beam, and the range indications may differ every time that MEASURE L button is depressed. To eliminate the adverse background effects, the frame of the binocular objective lens should be fitted with the diaphragm 22 (Fig. 6) and secured by means of a pin and rubber clamp on the case.
Don’t use the diaphragm in low temperatures, in mist and limited visibility conditions.
When using the compass to orient the rangefinder, keep in mind that the indexing accuracy of the magnetic needle is affected by the nearby iron or steel objects. The motor vehicles and similar massive objects must be at least 10 m away,
7.6.To check the range finder for proper operation when using the AI and the tripod:
- Check the AI zero elevation reference (ER "0"); - Check the AI compass.
ER "0" is the setting of the elevation scale that corresponds to the horizontal position of the range finder Binocular axis.
7.6.1.To check the zero elevation reference, proceed as follows: - Stick a pole at 50 to 100 m away from the unit and mark it
with the rangefinder objective height above the ground level; - Aim the reticle crosshair to the mark and read the tilt angle
(A1);
- swap the rangefinder and the pole positions, and apply another mark to the pole in accordance with the new height of the rangefinder objective;
- Aim the crosshair to the new mark of the pole and read again the tilt angle (A2);
- find the ER "0" from the formula:
A1 + A2
ER "0" =
