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3-8 Attachment and Detachment of Tribrach
The tribrach of R-322, 323, 325, 322N, 323N, 325N, and 326 are detachable
from the instrument if required when replacing the instrument with a target or unit
prism for example.
Detachment
First loosen the recessed screw with a screwdriver, then rotate the locking knob
until the arrow points upward, and lift the instrument up.
Attachment
Mount the instrument on the tribrach with the guide marks coinciding, and rotate
the locking knob until the arrow points downward.
The guide and guide mark must be fitted to attach the instrument.
When the tribrach does not need to be attached or detached or instrument is to
be transported, tighten the recessed screw with a screwdriver to fix the locking
knob.
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3 PREPARATION FOR SURVEYING
Instrument
Tribrach
Recessed screw Tribrach locking lever
Guide mark
PENTAX R-300 (p20-52) 10/30/02 11:08 AM Page 32