Tape Correction, Sag Correction, Pull Correction and Temperature Correction
In this article, I will list out different formulas for the respective corrections…
The following corrections are to be made for measurements taken with a tape because tape can never be practically used under specified standard conditions.
Correction for absolute length
Absolute length of tape is its actual length under specified condition
Ca = Lc/L
Where, Ca = correction to be applied to the tape in ‘m’
Lc = measured length in ‘m’
L = nominal length of tape in ‘m’
Correction for temperature
Length of tape is increased with the increase of temperature and decrease with decrease of temperature.
Ct = A (Tm – Ts)
A = coefficient of thermal expansion per one degree Kelvin
Tm = temperature during the measurement in Kelvin
Ts = temperature at which the tape standardised in Kelvin