GE moisture.IQ, User Manual

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moisture.IQ User’s Manual 73
Chapter 5. Using the Configuration Menu
5.4.4 Entering Saturation Constants
Henry's Law is applicable to ppmw moisture measurements in all organic liquids. It states that, “ At a constant
temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional
to the partial pressure of that gas in equilibrium with that liquid.”
In other words,
PPMw = (Pw/Ps) x Cs
. To
calculate ppmw moisture values for an organic liquid with the moisture.IQ, saturation values (
Cs
), as a function
of temperature, must be entered in the Cs Table shown in Figure 64 below.
Figure 64: Cs Table (Henry’s Law) Screen
To enter the Cs values for your application, complete the following steps:
1. Tap the
Channel
button and specify the channel for which the Cs curve should be applied.
2. Use the
Insert Row
and
Remove Row
buttons to configure the table with up to 10 rows.
3. To enter or edit the data in the table, tap the desired table cell to highlight it in blue. Then, tap the
Edit
Value
button to enter the data for that cell.
Figure 65: Selecting the Chemical