This time you will see the value of the PAR reading from the probe. Now is a good time to play around with the system a bit, shine a light on the probe, or take it outside and poke it into a few canopies.
♦Press the red (GO) button to store the reading. Take a few more readings, pressing Enter or the red button, and using NOTE, so that you store a few annotated readings to your data file.
You may hear occasional beeps as you take readings. These are to help you keep track of the reading process without constantly having to look at the Workabout: one beep for READ, a double beep for STORE.(If you hate beeps, they can be turned off - later!)
Connecting the Beam Fraction Sensor
If you have got a Beam Fraction Sensor...
♦Screw the BFS connector into the socket at the back of the SunScan probe.
♦In Menu, Settings, SunScan probe, Enter, set the Ext sensor: to BFS. Press
Enter to accept this setting.
♦Use Menu, Settings, Display, Enter, and set the display to LAI.
Now when you take readings, you will see a value of the Leaf Area Index.
Mount the BFS above the canopy, with the arrow facing North, level, and with the Shade ring adjusted so that it casts a shadow over the more northerly photodiode .
SunScan probe held level within the canopy being measured.
22 • SunScan Tutorial | Document code: |
