Emerson NGA2000 Reference Manual page 120

Reference Manual
748384-C
September 2003
TEMPCOMP
Direction
Binding
Type
Value range
Units
Description
Usage
See also
TIME_LEFT
Direction
Binding
Type
Value range
Units
Description
Usage
See also
TLIMA
Direction
Binding
Type
Value range
Units
Description
Usage
See also
2-58 Analyzer Variables
Bidirectional
None
Enumerated
DISABLED; ENABLED
None
CLD only; selects whether the temperature compensation is enabled or not
If enabled, the CLD uses the sensor block temperature controller duty cycle to
determine the ambient temperature. The temperature compensation algorithm uses
this to adjust the output for temperature changes.
Analyzer and 1/0 module: output
None
NDIR, PMD, I/0 module: Integer; FID: 3-element integer
0 - 300 or so; 0 - 999 in I/0 module
Seconds
The time remaining in a function.
General use (FID only).
Number of ignition tries in the present sequence.
Timer for the air purge.
ACAL, SCAL only; shows the time left in the current procedure.
Analyzer: Used to show how much time remains for the present function. In the case
of the FID, element two counts how many ignition tries so far (unsuccessful if greater
than 1); element 3 times the purge air. This is stopped if DIGDIAGA element 3 is set,
i.e., the purge is successful.
I/O module: Shows the time left until time out for the current section of a calibration
cycle. This either refers to the time until a fixed event, such as the remaining time on a
zero gas soak before the analyzers are told to zero themselves, or the time left until a
time out occurs, such as while waiting for an analyzer to zero itself, this value will count
down from 999. At the end of this time the procedure will abort if the analyzer has not
reported a successful calibration. Otherwise the procedure will move on as soon as the
analyzer has reported a successful calibration, whatever the value of this variable.
Bidirectional
None
2-element floating point array (6-element in the FID and CLD)
User selectable, depending on application
°C
Internal temperature measurement limits:
Case temperature upper limit (NDIR, PMD, FID), Converter temperature (CLD).
Case temperature lower limit (NDIR, PMD, FID), Converter temperature (CLD).
Flame temperature upper limit (FID), Sensor block temperature (CLD).
Flame temperature lower limit (FID), Sensor block temperature (CLD).
Sensor block temperature upper limit (CLD), Preamp temperature (FID).
Sensor block temperature lower limit (CLD), Preamp temperature (FID).
Limits on the temperature measurements. If transgressed, the alarm system Will issue
warning alarms.
TEMP_WAS
NGA2000 Reference
Rosemount Analytical Inc. A Division of Emerson Process Management