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Using Gas Select and COMPOSER Serially
To recongure your ow controller to ow a dierent gas, look up its Gas
Number (see "Numerical List of Gases" on page 57). Then type:
Choose a gas: [unit ID]g[Gas Number]<CR>
Example1: ag8<CR> (recongures to ow nitrogen)
Example2: ag206<CR> (recongures to ow P-10)
COMPOSER user mixes are selected in the same way. All COMPOSER gas mixes
have a Gas Number between 236 and 255.
Choose a user mix: [unit ID]g[Gas Number]<CR>
Example: ag255<CR> (recongures for user mix 255)
Dening a new COMPOSER gas mix is faster using serial commands than
using the front panel. The basic formula for this is:
[unit ID]gm [Mix Name] [Mix Number] [Gas1 %] [Gas1 Number] [Gas2 %] [Gas2 Number]...<CR>
» [Mix Name] Use a maximum of 6 letters (upper case and/or lower case),
numbers and symbols (space, period or hyphen only).
» [Mix Number] Choose a number from 236 to 255. If a user mix with that
number already exists, it will be overwritten. Use the number 0 to assign the
next available number to your new gas. Note: COMPOSER gas numbers are
assigned in descending order from 255.
» [Gas1 %] [Gas1 Number]... For each constituent gas, enter its molar percentage
(using up to 2 decimal places) and then its Gas Number (page 57). You
must have at least 2—but no more than 5—gases in your COMPOSER mix.
After creating your COMPOSER mix, your ow controller will conrm the new
gas:
Example1: Create a mix of 71.35% helium, 19.25% nitrogen and 9.4% carbon
dioxide as Gas 252, called "MyGas1".
agm MyGas1 252 71.35 7 19.25 8 9.4 4<CR>
Response: A 252 71.35% He 19.25% N2 9.40% CO2
Example2: Create a mix of 93% methane, 3% ethane, 1% propane, 2% nitrogen
and 1% carbon dioxide, using the next available gas number, called "MyGas2".
agm MyGas2 0 93 2 3 5 1 12 2 8 1 4<CR>
Response: A 253 93.00% CH4 3.00% C2H6 1.00% C3H8 2.00% N2 1.00% CO2
Note: The sum of all gas constituent percentages must equal 100.00%.
Serial Communications
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