Calibration and calibration report
Calibration and calibration report
- General information
Calibration
You may calibrate the temperature readings measured by the tag. Calibration uses the format aT²+bT+c, where a,
b and c are configurable coefficients. These coefficients may only be written with tag configuration via NFC. The
coefficients may be read in connected mode.
They are transmitted in the format XeY, where X is an integer between -32768 and 32767, followed by a superscript
Y from -128 to 127. XeY is equivalent to X.10^Y. Examples:
- 125e-5 = 0.00125
- 1e-2 = 0.01
- 12e-1 = 1.2
Examples of complete calibration: - Sensor reading before calibration = 25.00°C. Calibration polynomial [c, b, a]: [ 5e-1, 1e0, 0e0 ]. The
calculated value is therefore: Tcal = 25.5°C - Sensor reading before calibration = 25.00°C. Calibration polynomial [c, b, a]: [ 0e0, 101e-2, 0e0 ]. The
calculated value is therefore: Tcal = 25.25°C
You may not change the calibration state (activated/deactivated) in connected mode when datalogging is running.
You may only define a first-degree polynomial (bT + c), or a 0 degree polynomial (only c, which can be used for
testing). Coefficients are always sent in the following order: [c, b, a].
Calibration
You may save a report containing calibration values (with the pair: setpoint value + measured value and calibration
result) in tag memory. The report can be read in connected mode. Report example: - Setpoint value 1: 25.00°C
- Measured value 1: 25.21°C
- Setpoint value 2: 75.00°C
- Measured value 2: 75.56°C
- Report result: 1 (OK)