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2
Select one of the numbers 1 to 4.
ð
A set of parameters is displayed for each stored gas. If there is an unused
entry, "No Entry" is displayed.
3
Press the button "Edit".
ð
If you want to detect one of the gases from the stored gas library, press the
desired entry. See also "Gas library [
93]".
ð
If the desired gas is not stored, scroll to the end of the gas library and select
"User-defined gas". Then, assign a name of your choice in the window
"Equivalence gas name" and confirm your choice. Then enter the molar mass
and viscosity factor of the equivalence gas. For all gases that are not
available in the gas library, please feel free to contact INFICON.
4
Make your customer-specific entries in the following windows, which are brought
up by the assistant, first "Absolute pressure equivalence gas".
ð
Corresponds to the absolute pressure of the equivalence gas in the test
object in bar.
5
Window "Measuring mass".
ð
This is the mass of the tracer gas (helium, mass 3 or hydrogen)
6
Window "Percentage of measuring gas".
ð
This is the gas proportion of the tracer gas in percent, e.g. for forming gas
(95/5) it would be 5%.
7
Window "Absolute pressure measuring gas".
ð
Corresponds to the absolute pressure of the tracer gas in the test object in
bar.
Example
An air conditioning system is to be checked for leaks. The system is first filled with 2
bar (absolute) pure helium and checked for leaks. Later the plant will be filled with
R134a. The operating pressure is 15 bar (absolute).
This results in the following values for the above-specified parameters:
Absolute pressure equivalence gas = 15.0
Measuring mass = 4
Percentage of measuring gas = 100.0
Absolute pressure measuring gas = 2.0
6.3.2.3 Calculate equivalence factor
The equivalence factor is not calculated by the software of the device. Calculate the
equivalence factor using the following formula:
Summary of Contents for XL3000flex
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Page 48: ...6 Operation INFICON 48 108 XL3000flex Operating instructions jina83en1 07 2105 ...
Page 103: ...INFICON RoHS 13 XL3000flex Operating instructions jina83en1 07 2105 103 108 13 RoHS ...
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