Chapter 4 operation, 1 initialization and setup, 1 standard led display – INFICON Composer Gas Concentration Controller User Manual
Page 97: Chapter 4
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Composer Operating Manual
Chapter 4
Operation
NOTE: If you are experienced with operating this instrument,
, may provide you a quicker means to find the help you
need.
4.1 Initialization and Setup
Although the same information must be entered into the instrument, the process
varies slightly depending on if the standard or optional display is available.
Application-specific parameter values must be entered or downloaded in order
to customize the Instrument System for the application and provide the correct
interface to the system. The parameters normally affected include the gasses’
Specific Heat Ratios and Molecular Weights. Application-specific parameters
include the concentration’s target set point value, CONTROL OUT voltage
range and the control loop’s parameters; Gain, Time Constant and Control
Dead Time. A list of good starting values for the control loop parameters may
be found in
section 3.2.1.3, Typical Parameter Values, on page 3-24
and in
section 3.2.3, How to Determine Process Parameters, on page 3-28
4.1.1 Standard LED Display
Application specific parameters may be downloaded three possible ways:
1
When the optional Monitor program is used, parameter value customizing is
readily accomplished within the setup window for each Instrument System.
See
for information concerning the Composer
Monitor software.
2
Installations without the optional Monitor software require use of the Setup
software for downloading application parameters from a temporary digital
link. This link is also Windows based and is most easily run on a RS-232C
link from a portable PC (see
).
3
Through a user or OEM generated file, see
, for command structures.
Once downloaded, the parameters are permanently stored in battery-backed
RAM. See
for information concerning external communications.
NOTE: The expected life of battery-backed RAM is approximately 10 years.
Refer to
section 3.2.4, What if the NOVRAM’s Battery Fails and I Lose
All My Stored Parameters?, on page 3-32
.