Beam Axis And Line Of Sight - Pentax R-200 Series Instruction Manual

The check of the offset constant can be done on a certified base line. It can also be obtained in
a simple way as described below.
Checks
1. Locate points A, B and C at about 50m intervals on even ground.
2. Set up the instrument at point A, and measure the distances between AB and AC.
3. Set up the instrument at point B, and measure the distance BC.
4. Obtain the offset constant (K):
K=AC - (AB+BC)
Adjustments
●Contact your local dealer for adjustment of the off-set constant when the
K is not nearly 0.

10.9 Beam axis and Line of sight

Be sure to check that the beam axis and line of sight are aligned when the adjustments on
reticle and perpendicularity of line of sight to horizontal axis are made.
Checks
①Set the prism at a distance greater than 50 m.
②Accurately sight the center of the prism through the telescope.
③Turn the power on and press (MEAS) to measure.
④No adjustment is necessary if beam receiving buzzer sounds immediately
and measurement value is displayed in a few seconds.
Adjustments
50