Delta SS1-UM-1.05 User Manual download pdf (Page 21)

SunScan User Manual v 1.05 SunScan Tutorial •

••

• 21

♦ Now Set the Display to PAR (Menu,

Settings, Display, Enter

)

The procedure for taking, displaying and

storing a reading stays the same, but the

reading display and the data stored

change to reflect the new setting:

This screen is the same if you change the

Display to All, but the stored data also

includes readings from all 64 individual photodiodes.

Note: if you’re using a portable computer to control the SunScan, then the All

setting will actually display the 64 (emulated) photodiode readings.

Without a Beam Fraction Sensor

♦ Change the SunScan probe, Ext sensor to none. (Menu, Settings, SunScan

probe, Enter

)

The reading procedure is still the same

two-step process (read, store, read,

store...) without a Beam Fraction Sensor

- as long as you have the

Display set to

PAR or All. However, the screen displays

only the average PAR reading from the

SunScan probe and the spread of the

photodiode readings.

Things get more complicated if you want to take Leaf Area Index readings without a

Beam Fraction sensor. SunData still needs measurements of the Incident PAR and

the Beam Fraction, so you have to make them using the SunScan probe itself. We’ll

go into the details of this procedure later on, once you have got the SunScan probe

connected.

Connecting the SunScan probe

By now you should have a reasonable familiarity with using the Workabout, and

how the SunData menus work, so it is time to try taking some readings with the

SunScan probe connected.

♦ Plug the coiled serial cable from the probe into the

RS232 connector at the top

right of the Workabout.

♦ Use

Menu, Settings, Display, Enter, and set the display to PAR.

♦ Use

Menu, Settings, SunScan probe, Enter, to set the Data from: to SunScan

probe

♦ For the moment, even if you have a BFS, set the

Ext sensor: to none. Press

Enter to accept these settings.

SunData should display a version number at the top of the opening screen. If you see

Communications failed, you will need to recheck the connections.

If you don't get this far but get messages saying the serial port is in use, you must set

the Remote link to off. Exit from the SunData program if necessary (

∪

∪∪

∪+X). From the

Psion System screen, press Menu, Spec, Remote link, Enter, and select Off. Then

restart SunData.

♦ Press

Enter in the Next Reading screen.

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Delta SS1-UM-1.05 User Manual Page 21

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