Checking And Adjusting The Circular Level On The Tribrach - Leica GPS1200+ Technical Reference Manual

Geodetic satellite receiver

Hide thumbs Also See for GPS1200+:

Table of Contents

Equipment checklist

Check and adjust step-

Equipment Setup

Checking and Adjusting the Circular Level on the Tribrach

The circular level is used to level the antenna over the observation point. An incorrectly

adjusted circular level means that the GNSS antenna is not properly levelled over the point.

This means that in fact another point on the ground is observed.

Tribrach should be checked and adjusted

before the first use.

before each precision survey.

after long periods of transport.

after long periods of work.

if the temperature changes by more than 20°C.

Set up the tripod.

Screw the tribrach onto the tripod.

Fix the carrier to the tribrach.

Level the tripod using the precision bubble on the carrier.

Is the circular level on the tribrach centered and does not extend beyond the

Carrier with precision bubble checked and

Adjusting pin