Newcon Optik LRB 20 000 - Manual (Page 9)

7. PREPARING FOR USE
7.1. Choose an observation post.
7.2. Rotate the objective frame to bring the reticle in sharp focus.
7.3. Check range finder for proper operation:
- battery voltage;
- the range finder for proper functioning.
7.3.1. To analyze the battery voltage, set the ON-OFF selector switch to
the ON position and check if the Low Battery indicator glows red in the
left-hand eyepiece. If it does, replace the battery.
BEFORE REPLACING BATTERY, SET SELECTOR TO OFF.
7.3.2. To check the range finder for proper functioning, proceed as
follows:
- Binocular the range finder on the target;
- set the ON-OFF selector switch to ON;
- depress the MEASURE 1 button;
- as the readiness indicator comes on, release the MEASURE 1
button and read the measured range;
- compare the range measurement result with the actual distance.
The range finder is in good working order if the range measurement is
accurate to 5 m.
If no precise target range is available, the range finder is checked for
proper functioning by measuring the range three times on the same target.
The range finder is functioning properly if the measurements differ within
a maximum of 5 m. In the absence of the returned signal, zeroes are
displayed in all the digit positions of the range indicator (00000). In the
absence of the outgoing pulse, zeroes are displayed in all the digit
positions and the decimal point, in the third position.
7.4. To use AI and tripod for observation, proceed as follows:
Arrange the tripod on selected site;
Extend the telescoping legs at the desired length so that one of
them aligns with the ranging direction. Level the base as far as
practicable.
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 up pressing
lengthwise.
- The AI is installed and levelled through the use of ball-mount by
turning AI in ball-mount seat and putting the level bubble into the
centre of ring marks.
- Secure AI by clamp.
- Sliding the range finder along the AI bracket guides, fit the AI
clamp into the T-shaped opening in the range finder bracket, and
turn the handle of the clamp to lock the range finder in position.
7.5. Use the AI compass or the reference directional angle to align the
range finder with the base line.
7.5.1. To align the range finder with the base line, proceed as follows:
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;
Binocular the range finder on the reference point;
rotate the azimuth dial to align the base reference value read
thereon with the vernier zero. Now, the range finder is aligned with the
base line within 30.00 mils;
turn the clamping handle to lock the azimuth dial in position.