Sample Gas; Custom Gas - Ametek 5800 User Manual

Sample Gas

4-8 | 5830 Moisture Analyzer
This list allows you to specify the sample gas you want to analyze.
Select Gas
Press Enter to move to the listing of sample gases. Scroll up/down the list
to select the correct sample gas.

Custom gas

If you press the "Custom Gas " selection, you will be prompted to enter
a Gas K Factor. The Gas K Factor is a parameter used by the mass flow
meter in the Model 5830 to adjust for the molar heat capacities of differ-
ent gases. Nitrogen is used as the reference gas for the K factors, and its
value is defined as 1.000. To estimate the K factor for another gas, take the
ratio of the molar heat capacity (constant pressure) of nitrogen to that of
the sample gas. For example, the K factor of argon would be estimated as
follows:
Molar heat capacity of nitrogen
Molar heat capacity of argon
K factor
K factor
= 29.12 JK mole
-1 -1
= 20.79 JK mole
-1 -1
= 29.12 JK mole /20.79 JK
-1 -1
= 1.401
mole
-1 -1