Delta SS1-UM-1.05 User Manual download pdf (Page 49)

SunScan User Manual v 1.05 Measurement options •

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• 49

Levelling is most critical when you are using the probe:

• for the incident radiation above the canopy, and

• when then direct solar beam is strong, and

• when the sun is low in the sky.

Use of the tripod

The probe base has a standard camera mount socket for use with the tripod. You will

probably not want to use this routinely, but you could use it, for example, to mount

the probe in one fixed position for taking readings in the Autolog mode during the

course of a day.

The Workabout

Whatever measurements you are taking, you will always have the probe connected

via its coiled cable to your Workabout or other data collection device. The terminal

case and strap supplied with the Workabout should enable you to operate the

keyboard with one hand.

BFS handling in the field

The Beam Fraction sensor is definitely recommended for taking most types of

readings, however the extra cable connection to the SunScan probe does add an

unwelcome practical complication! If, in addition, you are using a portable PC

instead of the Workabout, you may find that a two-person team can cope much better

than a single person working alone.

Using the tripod

The BFS has a tripod mount, which will probably be the most convenient mounting

method to use above low field canopies (up to about 1.8 m high). If you are working

with canopies higher than this, you will need to devise an alternative mounting

method.

Diffuse photodiode. In line with

the shade ring pivots

Bubble level.

Desiccant indicator

Total photodiode

Align this arrow with North

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Delta SS1-UM-1.05 User Manual Page 49