FIELD JOB TITLE
FIELD WORK NAME
Two peg test
Two Peg Check is a surveying operation carried out to determine perhaps the leveling bubble and telescope line of eyesight are seite an seite.
Peg Test is a surveying operation performed to determine in the event the leveling bubble (bubble axis) and telescope line-of-sight (line of collimation) are parallel.
FIELD OPERATE PROCEDURE
FIELD WORK METHOD
we. Each group is required to perform a peg test out to check the instrument. 2. Each person in the group is record the results in the Peg Evaluation in their individual field book. iii. Placed and mark on the ground (with wooden pegs driven into the ground) two point a lot of 15 meters apart. 4. Instrument is placed midway among two level A and B. versus. Staff is usually read on each staff stage A and point M and the height difference can be calculated. Made sure the bubble staff is definitely center mire. Next, device is shifted about 5m behind the purpose B. and staff by point A and stage B is definitely read. vii. Record the data.
Point A2 вЂ“ point B1
=1. 312 вЂ“ 1 . 310
Point A2 вЂ“ level B2
=1. 239 вЂ“ 1 . 238
STN 1 вЂ“ STN 2
sama dengan 0. 002 вЂ“ zero. 001
в€† < В± 2mm
The problem is В±2mm so it can be accepted. The instrument is in good condition and can used in discipline work.
The instrument can be determined the leveling bubble (bubble axis) and telescope line-of-sight (line of collimation) are parallel.