When placing the sighting boards on the rail head, it is essential to ensure proper contact by pressing down in
the base of the board with the sole of the foot, on either side of the upright.
Working towards oncoming traffic, the sighting board is placed on the first high spot and the target board on the
second.
The intermediate board is set up on the rail between them at every alternate or fourth sleeper and at each joint
sleeper in turn. It is levelled and adjusted on the line of sight as instructed by the person viewing through the
sighting board slit, so that at the top edge of the intermediate board lines up horizontally with the sighting line on
the target board head.
The adjustment i.e. the scale reading of the intermediate board is read and chalked on the rail or sleeper at each
point. The sighting board is next moved to the high spot at which the target board was originally set up, the latter
being moved to the next high spot ahead. The procedure with the intermediate board is then repeated.
6.0
Accessories
▪
ABT4067 Packing Shims (Metric)
▪
ABT3142/1 Canister for MSP (Metric) - Provides 2.0mm lift
7.0
Maintenance
Care should be taken to avoid dirt entering the various tool mechanisms, as this may reduce effectiveness. The
tool may be cleaned by wiping with a damp cloth.
