Calibration and calibration report

 

Calibration and calibration report

  1. 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)