
44
Appendix A: Design and Test Summary
BF5 User Manual v 2.3
PAR output
This graph shows a comparison of a BF2 against two Delta-T quantum sensors and a shade
ring. Data recorded at Winster, Derbyshire, 20 – 31 May 1999. The graph plots hourly
averages of readings every 5 seconds. Note the offset Y-axis to separate the Total and Diffuse
plots.
Hourly Averages
y = 0.980x
R
2
= 0.994
y = 0.990x
R
2
= 0.994
-200
0
200
400
600
800
1000
1200
1400
0
200
400
600
800
1000
1200
1400
1600
QS umol.m-2.s-1
B
F
2
D
iff
u
se
u
m
o
l.m
-2
.s
-1
0
200
400
600
800
1000
1200
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1600
B
F
2
T
o
ta
l u
m
o
.m
-2
.s
-1