Campbell Scientific Q7_1-L REBS Net Radiometer User Manual
Page 6
Q-7.1 NET RADIOMETER
4
3.2 PROGRAMMING EXAMPLE WITH FIXED
WIND SPEED CORRECTION
The following CR10(X) program measures the
output of a Q-7.1. A static wind correction is
applied to each measurement.
Example 1. CR10(X) Program with the
Static Wind Speed Correction
;Measure the Q7.1.
;
01:
Volt (Diff) (P2)***
1:
1
Reps
2:
24**
± 250 mV 60 Hz
Rejection Range
3:
1*
DIFF Channel
4:
3*
Loc [ Rn_W_m2 ]
5:
1
Mult
6:
0
Offset
02:
IF (X<=>F) (P89)
1:
3*
X Loc [ Rn_W_m2 ]
2:
3
>=
3:
0
F
4:
30
Then Do
;Enter the positive multiplier (p.ppp).
;
03:
Z=X*F (P37)
1:
3*
X Loc [ Rn_W_m2 ]
2:
p.ppp
F
3:
3*
Z Loc [ Rn_W_m2 ]
04:
Z=X*F (P37)
1:
3*
X Loc [ Rn_W_m2 ]
2:
1.045
F
3:
3*
Z Loc [ Rn_W_m2 ]
05:
Else (P94)
;Enter the negative multiplier (n.nnn).
;
06:
Z=X*F (P37)
1:
3*
X Loc [ Rn_W_m2 ]
2:
n.nnn
F
3:
3*
Z Loc [ Rn_W_m2 ]
07:
End (P95)
*
Proper entries will vary with program, and
datalogger channel and input location
assignments.
**
On the 21X and CR7 use 500 mV input
range.
*** For a Single-Ended measurement use
Instruction 1.
3.3 PROGRAMMING EXAMPLE WITH DYNAMIC
WIND SPEED CORRECTION
The following CR10(X) program measures an
R. M. Young wind sentry anemometer model
03101 and a Q-7.1. The wind speed is used to
give a real-time wind correction to net
radiation. The wind speed must be measured
before the wind corrections are applied.
Example 2. CR10(X) Program with the
Dynamic Wind Speed Correction
;Measure the 03101 wind sentry.
;
01:
Pulse (P3)
1:
1
Reps
2:
1*
Pulse Channel 1
3:
21
Low Level AC, Output Hz
4:
1*
Loc [ ws_m_s ]
5:
.75
Mult
6:
.2
Offset
02:
IF (X<=>F) (P89)
1:
1*
X Loc [ ws_m_s ]
2:
1
=
3:
.2
F
4:
30
Then Do
03:
Z=F (P30)
1:
0
F
2:
0
Exponent of 10
3:
1*
Z Loc [ ws_m_s ]
04:
End (P95)
;Measure the Q7.1.
;
05:
Volt (Diff) (P2)***
1:
1
Reps
2:
24**
± 250 mV 60 Hz
Rejection Range
3:
1*
DIFF Channel
4:
2*
Loc [ Rn_mV ]
5:
1
Mult
6:
0
Offset
06:
IF (X<=>F) (P89)
1:
2*
X Loc [ Rn_mV ]
2:
3
>=
3:
0
F
4:
30
Then Do
;Apply the positive calibration and
;wind speed correction.
;