Drift
- A measure of the degree to which the measured value changes over time
- It is usually caused by temperature changes or unstable components in the system.
- Can take two forms - offset and gain
- A measure of the degree to which the measured value changes over time
- It is usually caused by temperature changes or unstable components in the system.
- Can take two forms - offset and gain
Offset Drift
- A fixed deviation from the true value occurs at all points in the measured range
- Can be corrected by one-point calibration (zeroing)
Gain (Gradient) Drift
- The deviation from the true value increases progressively as the upper range is approached
- Can be corrected by two-point-calibration