B-29
B-30
Secondary Span CO
2
When the secondary span command for CO
2
is received, the instrument computes new values
for both S
c0
and S
c1
. First, it measures a new and computes a new β
c
from equation B-27.
Then it uses these, plus the retained values (α
c1
and β
c1
from the previous normal span) to com-
pute
B-31
Given the new span slope S
c1
, update the span offset S
c0
by equation B-26.
Symbol Summary
Many of the quantities described in the above section are available from the LI-840A. These are
summarized in Table B-1 below.
Symbol XML Tag: <LI840>+ Description
α
w
<data><h2oabs> H
2
O absorptance
Table B-1. Symbol summary
Appendix B
Appendix B. Equation Summary B-11
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