Description - Delta-T Devices SunScan SS1 User Manual

Description

SunScan probe
The light sensitive "wand" of the probe is 1 metre long, containing 64
photodiodes equally spaced along its length. The probe handle contains
batteries and electronics for converting the photodiode outputs into digital
PAR readings, which get sent to your PDA via the RS232 link.
An optional radio link is available for BF5.
Beam Fraction sensor
The Beam Fraction sensor (BFS) also measures PAR light
levels. It is used to monitor the light incident on the canopy at
the same time as you are making measurements beneath it.
Beam fraction sensors incorporate multiple photodiodes, of which one is
always shaded. This patented design allows the direct and diffuse
components of PAR to be separated, which
is necessary for the computation of LAI.
A radio transmitter is available for connection
to SunScan fitted with a radio link.
BF5 and BFS Terminology
We continuously improve the design of our beam fraction sensors.
All are interchangeable and compatible with SunScan
The current model is the BF5.
The newer versions are called Sunshine Sensors - they all measure direct
and diffuse radiation, and so all are Beam Fraction Sensors
Note: The SunData software refers to them all as BFS sensors.
PDA
To configure, observe and store readings from the SunScan
probe, you need a Personal Digital Assistant or PDA running
Windows 2003 or Mobile 5 or 6.
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Apart from the BF1 which is not compatible with the radio link option.
SS1 User Manual v3.3
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Introduction  9