Beam Axis And Line Of Sight - Pentax R-2500DN Series Instruction Manual

[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.
Instrument

12.8 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]
① Set the prism at a distance greater than 50m.
② Accurately sight the centre of the prism through the telescope.
③ Turn the power on and press (MEAS) to measure.
④ No adjustment is necessary if beam receiving buzzer sounds immediately and
measurement value is displayed in a few seconds.
[Adjustments]
• If instrument function is not as described in ④, contact your local dealer.
• This check should be done under good weather conditions.
A
Instrument
A
Prism
B
B
Prism
C
Prism
C
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