LI-COR LI-820 - Page 72

Section 4
4-14 Theory of Operation
Set Span 2
Readings are averaged for 30 seconds to compute
αα
2
1==−
W
W
Z
o
4-18
Equations 4-14 and 4-15 are performed, and the

T
value retained as a
T2
. The S
1
comes from
S
TT
1
2
2
1
1
21
=
−
−
α
α
α
α
αα
4-19
The S
o
parameter can then be computed from Equation 4-16.