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Campbell Scientific CNR4 Net Radiometer User Manual

Page 30

background image

CNR4 Net Radiometer

Average short-wave net radiation

Average long-wave net radiation

Average

albedo

Average

net

radiation

'CR1000 Series Dat logger

a

'
'CNR4 program
'This program meas

er

ures CNR4 four-component net radiomet

'This program also

NR4

measures the thermistor inside the C

'
'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 jumper 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)
'
'

'
'8H
'8L CNR4 thermistor signal (white)

'gnd CNR4 thermistor signal reference (black)
' CNR4 thermistor shield (clear)
'


'VOLTAGE EXCITATION

'
'EX2 CNR4 thermistor voltage excitation (red)
'


'CNR4 sensor
Public logger_temp, batt_volt

Public cnr4(4)
Alias cnr4(1) = short_up
Alias cnr4(2) = short_dn

Alias cnr4(3) = long_up
Alias cnr4(4) = long_dn


Public cnr4_T_C

'CNR4 thermistor temperature in Celcius

Public cnr4_T_K

'CNR4 thermistor temperature in Kelvin

Public long_up_corr

'Downwelling long-wave radiation with temperature correction

Public long_dn_corr

'Upwelling long-wave radiation with temperature correction

Public Rs_net

'short-wave net radiation

Public Rl_net

'long-wave net radiation

Public albedo

'Albedo

Public Rn

'total net radiation

22