Emerson NGA2000 Reference Manual page 106

Reference Manual
748384-C
September 2003
PLIM
Direction
Binding
Type
Value range
Units
Description
Usage
See also
PLIMA
Direction
Binding
Type
Value range
Units
Description
Usage
See also
PPU
Direction
Binding
Type
Value range
Units
Description
Usage
See also
2-44 Analyzer Variables
Bidirectional
None
NDIR, PMD: 2 element floating point array; FED: 6-element array; CLD: 4-element
array
0-1050
hPa
Sample pressure upper limit
Sample pressure lower limit.
Fuel pressure upper Emit (FID), Ozonator pressure upper limit (CLD)
Fuel pressure lower limit (FED), Ozonator pressure lower limit (CLD)
Burner air pressure upper limit.
Burner air pressure lower limit.
These values are used by the alarm algorithm to generate warning alarms if the limits
are exceeded by the pressure measurement, and if the alarms are enabled by
ALARM_LVL
ALARM_LVL
BAROMETER
PRESS_IS
Bidirectional
None
2-element floating point array
0-1050
hPa
Purge air pressure upper Emit (FID only)
Purge air pressure lower limit
These values are used by the alarm algorithm to generate warning alarms if the limits
are exceeded by the pressure measurement, and if the alarms are enabled by
ALARM_LVL
ALARM_LVL
BAROMETER
PRESS_IS
Bidirectional
PPU
Enumerated
hPa; psig.
None
Selects the units for pressure variable display for this analyzer.
The NGA control module displays any variable with units defined as PPU in the
pressure units selected through the variable PPU. The pressure is still transmitted in
hPa (the SI unit), but it is interpreted as hPa or as psig as PPU is selected. It is
important to note that the pressure value itself is not changed, it is merely displayed
differently.
PTU
PVU
NGA2000 Reference
Rosemount Analytical Inc. A Division of Emerson Process Management