INFICON Composer Gas Concentration Controller - Manual (Page 102)

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Composer Operating Manual
4.3.2.2 Bulk Flow Control Configuration
All instrument function is controlled externally through Input #4 of the system
I/O connector. Refer to
section 3.1.13 on page 3-11 .
4.3.3 How To Shut Down The Instrument
Press the POWER switch on the front panel of the Controller. The green color
of the Power LED will quickly extinguish. It is recommended that any auxiliary
communication applications such as the optional Monitor Software or Setup
Tool be closed first.
4.3.4 Description and Purpose of Operating Modes
4.3.4.1 Measuring Mode — Amplitude Track
Presently, the only measuring mode is Amplitude Track. The Diagnostic Sweep
mode is only accessible with the optional Monitor Software.
4.3.4.2 Control Configuration — Concentration and Bulk Flow
There are two control configurations: Concentration and Bulk Flow
4.3.4.2.1 Concentration Control Configuration
STOP, BYPASS, and CONTROL are the primary states of the Composer that
are useful for controlling and setting up a delivery system in the Concentration
Control mode.
START . . . . . . . . . . . . . . . . . . . . . . Initiates the control state which
manipulates the bubbler and dilution flows
to maintain the target concentration.
STOP. . . . . . . . . . . . . . . . . . . . . . . Terminates the controlled manipulation of
the bubbler and dilution outputs and sets
them to zero.
BYPASS . . . . . . . . . . . . . . . . . . . . Sets the bubbler flow to zero (or MIN
FLOW, if used) and manipulates the
dilution flow to provide the total delivery
system’s flow.
MANUAL . . . . . . . . . . . . . . . . . . . . Allows the user [through the Monitor
software or the communications interface]
to individually set the bubbler and dilution
flows as desired.
These states, except Manual, are accessible through the front panel LCD
version as well as the external I/O and external communications for all versions.