Apex Digital MASS FLOW METER, Руководство по эксплуатации

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2020.07.24 • REV. 2 • MASS FLOW METER OPERATING MANUAL
25
Using COMPOSER to Personalize Mixed Gas Compositions
To remain accurate, your flow meter needs to know the viscosity of the gas
you are flowing through it. The more closely you can define your actual gas
composition, the more accurate your flow readings will be. COMPOSER
is an included feature of Gas Select that lets you define new mixed gas
compositions to reconfigure your flow meter on the fly.
COMPOSER uses the Wilke's semi-empirical method to define a new gas
mixture based on the molar (volumetric) ratios of the gases in the mixture.
You can define these gas compositions to within 0.01% for each of up to
five constituent gases in the mixture. Once you define 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 flow meter.
✓
Note: COMPOSER does not physically mix any gases for you. It
reconfigures your flow meter to report flow readings more accu-
rately based on the constituents of your defined gas mixture.
Menu
→
Basic Config
→
Gas
→
COMPOSER User Mixes
To access COMPOSER, select
COMPOSER User
Mixes
from the Gas Select category listing
(for more information on the category listing,
see page 23 ). Select any existing mix to
reconfigure your flow meter to measure that
gas mixture.
Select
Delete Mix
to permanently remove
a gas mix.
Press
SET
to confirm your selection. The
setting will be applied immediately, and exit
to the Main Display ( page 17 ). Otherwise,
CANCEL
will return to the Gas Select Menu.
UP DOWN PAGE
Recent
Standard
>COMPOSER User Mixes
Bioreactor
Breathing
Chromatography
Fuel
Laser
BACK SELECT
Category Listing Menu
UP DOWN PAGE
>Add Mix: 17 Free
MyGas1 User Mix 255
MyGas1 User Mix 254
MyGas1 User Mix 253
Delete Mix
CANCEL SET
A list of existing mixes