Reference Manual
748384-C
September 2003
Analyzer Variables
Rosemount Analytical Inc. A Division of Emerson Process Management
2-6
NGA2000 Reference
AUTO_REIGNIT
Direction Bidirectional
Binding
None
Type Enumerated
Value range
DISABLED; ENABLED
Units None
Description
FID only; controls the auto-re-ignition function
Usage
When enabled, allows the ignition function to attempt to ignite the flame a number of
times if the first time fails. This does not allow the FID to re-ignite its flame if the
flame goes out - for safety reasons this is a manual feature only.
See also
AUTOIGNITE
AUTOIGNITE
Direction Bidirectional
Binding
None
Type Enumerated
Value range
DISABLED; ENABLED
Units None
Description
FID only; enables the autoignition function.
Usage
Enables the automatic ignition function. This allows the FID to go through the correct
sequence of making the mixture richer, firing the glowplug, and determining whether
a flame has ignited. If this variable is set to DISABLED, the user has to manually set
the mixture and the glow plug firing.
See also
AUTO_REIGNIT
BAR_ENABLE
Direction Bidirectional
Binding
BAR_ENABLE
Type Enumerated
Value range
DISABLED; USE REMOTE READING; TRANSMIT LOCAL READING; USE LOCAL
READING
Units None
Description
Controls how the analyzer deals with BAROMETER
Usage
Selects whether the analyzer uses its internal pressure reading if any, or a network
reading, or transmits its reading as BAROMETER. Only one analyzer in a system
should transmit BAROMETER at once. If more than one do, BAROMETER win
switch between the two values provided by the analyzers, producing an unstable
PVA value.
See also
BAROMETER
PVA
BAR_INTERNAL
Direction Output
Binding
BAR_INTERNAL
Type Floating
point
Value range
1013 ± 3% except for NDIRs ± about 50%
Units hPa
Description
NDIR or PMD only; internal measurement of the sample exhaust pressure.
Usage
Reported value of the internally measured pressure, as distinct from the network
readable pressure BAROMETER. The analyzer uses BAR_INTERNAL if it is set to
use its internal pressure measurement, BAROMETER if set to use the external one.
See also
BAROMETER
BAR_ENABLE