Example 24: corr_irr2 - generic irradiance and PAR

This equation is a refined and simplified version of the one given in Example 23, and will typically be used to present irradiance in μW/cm²/nm, or PAR in μmol/m²/s.

$//<![CDATA[ \begin{array}{l}Irr_{tempcompensated} =  c_0 + c_1*c_2\left(R + x_0 + x_1*(T_{sensor}-x_3) + x_2*(T_{sensor}-x_3)^2\right)\end{array} //]]>$

where

• c0 is a user-adjustable dark offset value,
• c1 is the primary slope coefficient which transforms the value to final units,
• c2 is an immersion factor, which corrects for use in a medium other than was used for calibration; water compared with air, for example,
• R is the raw voltage ratio measured by the logger,
• x0, x1, x2 are factory-determined coefficients of a quadratic term, used to correct the sensor's dark current for temperature effects,
• x3 is the temperature at which the optical calibration was performed,
• T_sensor is the internally measured temperature of the sensor in °C, and
• Irr_{tempcompensated} is the final value of irradiance or PAR, temperature compensated and presented in final calibration units.

Examples

Confirms the channel type.

Sets the core coefficients.

Requests confirmation of all calibration coefficients.