Alicat VC Series Volumetric Flow Controller - Manual (Page 24)

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Gas Select – The selected gas can be changed via RS-232 input. To change the selected gas, enter
the following commands:
In Streaming Mode: $$#
In Polling Mode: Address$$# (e.g. B$$#)
Where # is the number of the gas selected from the table below. Note that this also corresponds to the
gas select menu on the flow controller screen:
# GAS
0 Air Air
1 Argon Ar
2 Methane CH4
3 Carbon Monoxide CO
4 Carbon Dioxide CO2
5 Ethane C2H6
6 Hydrogen H2
7 Helium He
8 Nitrogen N2
9 Nitrous Oxide N2O
10 Neon Ne
11 Oxygen O2
12 Propane C3H8
13 normal-Butane n-C4H10
14 Acetylene C2H2
15 Ethylene C2H4
16 iso-Butane i-C2H10
17 Krypton Kr
18 Xenon Xe
19 Sulfur Hexafluoride SF6
20 75% Argon / 25% CO2 C-25
21 90% Argon / 10% CO2 C-10
22 92% Argon / 8% CO2 C-8
23 98% Argon / 2% CO2 C-2
24 75% CO2 / 25% Argon C-75
25 75% Argon / 25% Helium A-75
26 75% Helium / 25% Argon A-25
27 90% Helium / 7.5% Argon / 2.5% CO2
(Praxair - Helistar® A1025)
A1025
28 90% Argon / 8% CO2 / 2% Oxygen
(Praxair - Stargon® CS)
Star29
29 95% Argon / 5% Methane P-5
For example, to select Propane, enter: $$12