B-21
where
B-22
The instrument retains the following values, which are used for subsequent secondary spans:
B-23
B-24
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-22.
Then, it uses these plus the retained values ( and from the previous normal span) to com-
pute
B-25
Given the new span slope S
w1
, update the span offset S
w0
by equation B-21.
Appendix B
Appendix B. Equation Summary B-9
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