Campbell CVF4 Spécifications télécharger pdf (Page 27)

CNR4 Net Radiometer

7.2.2 Example 2, CR3000 Program Using Differential Measurements

The Program Example 2 requires four differential channels to measure the four

radiation outputs and one excitation channel and one single-ended channel to

measure the thermistor. The program measures the sensors every 1 second,

performs the on-line processing of the data and stores the following processed

data to a data table called cnr4_data once every 60 minutes. It also stores the

raw time-series data from CNR4 to data table called cnr4_ts.

Minimum Battery voltage

Sample Datalogger panel temperature

Average Short-wave radiation (pyranometer up)

Average Short-wave radiation (pyranometer down)

Average Long-wave radiation (pyrgeometer up)

Average Long-wave radiation (pyrgeometer down)

Average CNR4 thermistor temperature (degrees C)

Average CNR4 thermistor temperature (Kelvin)

Average Corrected long-wave radiation (pyrgeometer up)

Average Corrected long-wave radiation (pyrgeometer down)

Average Short-wave net radiation

Average Long-wave net radiation

Average Albedo

Average Net radiation

'CR3000 Series Datalogger

'CNR4 program

'This program measures CNR4 four-component net radiometer

'This program also measures the thermistor inside the CNR4

'User must enter the sensitivity values for all four probes in the program and save/compile

'prior to downloading it to the datalogger.

'Search for the text string "unique" to find places to enter the sensitivity values.

'Wiring Instructions

'ANALOG CHANNELS

'1H CNR4 Pyranometer Upper signal (red)

'1L CNR4 Pyranometer Upper signal reference (blue)

'gnd jumper to 1L

'2H CNR4 Pyranometer Lower signal (white)

'2L CNR4 Pyranometer Lower signal reference (black)

'gnd jumnper to 2L

'3H CNR4 Pyrgeometer Upper signal (grey)

'3L CNR4 Pyrgeometer Upper signal reference (yellow)

'gnd jumper to 3L

'4H CNR4 Pyrgeometer Lower signal (brown)

'4L CNR4 Pyrgeometer Lower signal reference (green)

'gnd jumper to 4L

' CNR4 shield (clear)

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 59 60

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Campbell CVF4 Spécifications Page 27

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