User manual

Hukseflux Thermal Sensors
HFP01SC Manual v0811 page 16/33
The factory delivered calibration factor E
sen
is determined at the
factory using an electrically generated heat flux that is forced
through the sensor.
In soils, corrections of up to +5 to -20% relative to the factory
supplied calibration coefficient can be expected. (the +5% due to
temperature dependence)
During the calibration process it is suggested to discard the
measured values of the heat flux. This implies that during 6
minutes one could copy the flux value of just before the
calibration.
In case very small flux levels are measured, a delay of 10 mintes
can be used.