Delta-T Devices SunScan SS1 User Manual page 75

Logger requirements

The probe requires a voltage supply of 7-15 V dc (unregulated), at
about 30 mA current. The analogue output is enabled when the
external voltage is greater than the battery voltage.

Configure one channel of the logger for voltage input, with the above
sensitivity.

Use a "warm-up" time of 1 second (the logger must apply the power
1 second before taking its reading).

The output voltage will be stable 120 ms after applying external
power, and is updated every 60 ms while external power remains
connected.
B. Logging the Beam Fraction sensor
You can log the Beam Fraction sensor in a similar manner, using the
(optional) special logging cable for it. Three outputs are available,
corresponding to the Total incident PAR, Diffuse PAR and Sun state.
Be aware that separately logged incident PAR readings cannot be merged
with probe readings of transmitted PAR to give LAI estimates using the
SunScan mathematical model.
See also the BF5 Sunshine Sensor User Manual.
Note we can provide no data logger software to combine and process
these readings to estimate Leaf Area Index
SS1 User Manual v3.3
Appendices  75