12 Measurement preparation
RUNNER 20/24-1.0.1en
Levelling up
1. Place level onto tripod head.
Tighten central fixing screw of
tripod.
2. Turn footscrews of tribrach
into its centre position.
3. Centre circular level by
turning the foot screws.
Centring the circular level
1. Turn foot screws A and B
simultaneously in the opposite
direction until bubble is in the
centre (on the imaginary "T").
BL-12
BL-13
BL-14
BA
C
2. Turn foot screw C until bubble
is centred.