Emerson NGA2000 Reference Manual page 93

NGA2000 Reference
LASTZERO
Direction
Binding
Type
Value range
Units
Description
Usage
See also
LIN_CASETEMP
Direction
Binding
Type
Value range
Units
Description
Usage
See also
LIN_ERROR
Direction
Binding
Type
Value range
Units
Description
Usage
See also
LIN_GASESA
LIN_GASESB, LIN_GASESC
Direction
Binding
Type
Value range
Units
Description
Usage
See also
Rosemount Analytical Inc. A Division of Emerson Process Management
Output
None
Floating point
0 - the analyzer PVA Emit
ppm
The last zero gas reading, using the SPAN factor from the subsequent span
operation.
Shows any interaction between zero and span operations. If the span operation
affects the zero, this will show a change. It is most useful when trying to calibrate an
analyzer with a non-zero zero gas.
LASTSPAN
Bidirectional
None
Floating point
0-70
°C
The temperature at which the linearizer curve was made.
Used for temperature compensation of analyzers. The signal should be adjusted for
what it would be at the temperature that the analyzer was linearized, as the
linearization curve is itself dependent upon temperature. This variable contains that
value.
Other LINxxxxx variables
Output
None
Floating point
0-100
Percent
Not used.
Not used.
Bidirectional
LIN_GASESA, etc.
7-element floating point (except LIN_GASESC, 6-element) array
-1 - 1,000,000 (-1 shows that no value has been entered)
ppm
Linearization function actual gas input value.
Used in the "Tweak' and self linearization functions to enter the actual gas
concentrations.
Reference Manual
748384-C
September 2003
Analyzer Variables 2-31