Example 23: corr_irr - irradiance

This equation computes first a temperature corrected irradiance value in Volts:

Then applies a linear equation to convert to final units:

where

• c0, c1 are calibration coefficients

• x0, x1, x2 are coefficients required to convert the raw data in Volts

• x3, x4, x5 are the temperature correction coefficients

• n0  is the index of the temperature of the sensor channel,

• T_sensor is the temperature of the sensor in °C, 

• Irr_{tempcompensated} is the measured irradiance in Volts and compensated in temperature

• Irr_calibrated is the measured irradiance in final calibration units

Examples

>> channel 3 type
<< channel 3 type = irr_01

Confirm the channel type.

>> calibration 3 datetime = 20171201000000, c0 = 0.000, c1 = 1.0000

Set the core coefficients.

>> calibration 3 datetime = 20171201000000, x0 = 9.983, x1 = 0.2003, x2 = 1.000, x3 = 0.0721, x4 = 0.1049, x5 = 21.29

Set the cross-channel correction coefficients.

>> calibration 3
<< calibration 3 type = irr_01, datetime = 20171201000000, c0 = 0.0000, c1 = 1.0000, x0 = 9.983, x1 = 0.2003, x2 = 1.000, x3 = 0.0721, x4 = 0.1049, x5 = 21.29, n0 = 7

Request confirmation of all calibration coefficients.