February 16, 2019 0 Comment

1. Drift:
drift is defined as a slow change in the response of a gauge. short-term drift is frequently caused by heat buildup in the instrument at the time of measurement. Long term drift is usually not a problem for measurements with short calibration cycles.

2.Lack of gauge resolution:
Resolution called discrimination is the ability of the measurement system to detect and faithfully illustrate a small change in the result of measurement.

3. Lack of linearity:
Test of linearity starts by establishing a plot of the measured values versus corresponding values of reference standard. this obtains and indication of whether or not the points fall on the straight line with slope equal to one.

4. Hysteresis:
Hysteresis is a retardation of the effect when the forces act upon a body are changed for instance, a lagging in the values of resulting magnetization in a magnetic material beacause of the change in magnetizing force.