Appendix B. Equations summary
Zeroing CO
2
When the command for zeroing CO
2
is received, the instrument computes the
CO
2
zero term from equation B-21, where
,
,
, and
are averaged for
5 seconds.
B-21
Spanning H
2
O
When the command for setting the span for H
2
O is received, along with the target
concentration
W
T
, from the target concentration, the target absoprtance
α
T
is com-
puted from
B-22
LI-870 computes
S
w0
from equation B-23 , where
is averaged over five seconds.
B-23
where
B-24
The instrument retains the following values, which are used for subsequent sec-
ondary spans:
B-25
Secondary Span H
2
O
When the secondary span command for H
2
O is received, the instrument computes
new values for both
S
w0
and
S
w1
.
First, it measures a new
and computes a new
from equation B-24. Then, it uses these plus the retained values (
and
from the previous normal span) to compute
B-6
Using the LI-870 CO₂/H₂O Analyzer
Summary of Contents for LI-870
Page 1: ...Using the LI 870 CO2 H2O Analyzer...
Page 2: ......
Page 12: ...Section 1 Overview of the LI 870 1 4 Using the LI 870 CO H O Analyzer...
Page 18: ...Section 2 Using the LI 870 2 6 Using the LI 870 CO H O Analyzer...
Page 30: ...Appendix A Specifications A 2 Using the LI 870 CO H O Analyzer...
Page 41: ......
