Campbell Scientific NR01 Net Radiometer User Manual

Page 35

NR01 Four-Component Net Radiation Sensor

5.2.4 Example 4, CR23X Program Using Single-Ended Channels

Program Example 4 requires four single-ended channels to measure the four
radiation outputs, and four single-ended channels and one differential channel
for the 4WPB100 module to measure the Pt-100 temperature sensor. Wiring is
as in Table 4.3-2, using SE channels 1..4 and 4.5 above using differential
channel 3 and 4 for the PT100 sensor. The program measures the sensors every
2 seconds, then stores the following data to final storage every 60 minutes:

Array

Year
Day
Hour/Minute

Avg SR01 down (shortwave radiation)

Avg SR01 up (shortwave radiation)

Avg IR01 down (longwave radiation)

Avg IR01 up (longwave radiation)

Avg NR01 temperature (degrees C)

Avg NR01 temperature (degrees K)

;{CR23X}
;Example for SE measurements of the NR01 using a CR23X
;
*Table 1 Program
01: 2

Execution

Interval

(seconds)

;Measure all four sensor elements with one instruction, use auto-ranging for best resolution
1: Volt (SE) (P1)
1: 4

Reps

2: 30

Auto, 50 Hz Reject, Slow Range (OS>1.06)

3: 1*

Channel

4: 1

Loc [ SR01_up ]

5: 1.0

Multiplier

6: 0.0

Offset

;Apply the individual calibration factors to each component
;with one instruction

;Typical data on the data sheet might be
;Sensor

Sensitivity uV/W/m^2

;Pyranometer UP SR01

15.35

;Pyranometer DOWN SR01 13.30
;Pyrgeometer UP IR01

8.5

;Pyrgeometer DOWN IR01

8.2

; Multipliers calculated at 1000/sensitivity