33
Navigating and Customizing Your Flow Controller
Using COMPOSER™ to Personalize Mixed Gas Compositions
To remain accurate, your ow controller needs to know the viscosity of the
gas you are owing through it. The more closely you can dene your actual
gas composition, the more accurate your ow readings will be. Alicat's
COMPOSER is an included feature of Gas Select that lets you dene new
mixed gas compositions to recongure your ow controller on the y.
COMPOSER uses the Wilke method to dene a new gas mixture based on
the molar (volumetric) ratios of the gases in the mixture. You can dene
these gas compositions to within 0.01% for each of up to ve constituent
gases in the mixture. Once you dene and save a new COMPOSER gas mix,
it becomes part of the Gas Select system and is accessible under the gas
category COMPOSER User Mixes. You can store 20 COMPOSER gas mixes on your
ow controller.
Note: COMPOSER does not physically mix any gases for you. It
recongures your ow controller to report ow readings more
accurately based on the constituents of your dened gas mixture.
Fuel
SELECT
BACK
PAGEDOWN
Standard
COMPOSER User Mixes
Bioreactor
Breathing
Chromatography
Recent
UP
Laser
>
SELECT Enters the
COMPOSER Menu.
Gas Select - Category Listing
Gas Select | COMPOSER Menu
SET
CANCEL
DOWN
MyGas1 User Mix 255
MyGas2 User Mix 254
MyGas3 User Mix 253
Delete Mix
Add Mix: 17 Free
UP
>
CANCEL Returns to the Gas
Select Menu (page 31).
SET Conrms your selection
and exits to the Main Display
(page 19).
Add Mix Creates a new
COMPOSER gas mix.
COMPOSER Mixes Selects an
existing gas mix to use.
Delete Mix Deletes an
existing gas mix.
(Option appears if at
least 1 mix exists.)
To access COMPOSER, select COMPOSER User
Mixes from the Gas Select category listing.
Select any existing mix to recongure your
ow controller to ow that gas mixture. Select
Delete Mix to permanently remove a gas mix.
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