Calibration Equations
Zeroing H
2
O
When the command for zeroing water is received, the LI-840A computes the water zero from
equation B-19, where and are averaged for 5 seconds.
B-19
Zeroing CO
2
When the command for zeroing CO
2
is received, the LI-840A computes the CO
2
zero term from
equation B-20, where , , , and are averaged for 5 seconds.
B-20
Spanning H
2
O
When the command for setting the span for H
2
O is received, along with the target con-
centration W
T
, the LI-840A computes S
w0
from equation B-21 , where is averaged over five
seconds.
Appendix B
Appendix B. Equation SummaryB-8
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