Ametek 241CE II

Appendix A – System Options | A-5
d. Use the following formulas to calculate a new ExLo and ExHi to
compensate for the differences between the input value and the
displayed value:
A = Range Lo (ExLo range [low output from the external water
dewpoint/water content source])
B = Range Hi (ExHi range [high output from the external water
dewpoint/water content source])
C = Reading Lo (external water dewpoint/water content reading
on the User Interface)
D = Reading Hi (external water dewpoint/water content reading
on the User Interface)
E = New ExLo (newly calculated ExLo reading, from Equation 1).
New ExLo =
CD
ABxAC
A








−
−−
−
)(
)()(
Equation 1
New ExHi =
CD
ABxAB
E








−
−−
+
)(
)()(
Equation 2
e. If the new ExLo and new ExHi values are different, enter these
values in to the analyzer.
5. Repeat Steps 4-b and 4-c to ensure the readings on the User Interface
match the input signal.