Emerson NGA2000 Reference Manual page 98

Reference Manual
748384-C
September 2003
MEASUREPOINT
Direction
Binding
Type
Value range
Units
Description
Usage
See also
METHODA
METHODB, METHODC, METHODD, METHODE
Direction
Binding
Type
Value range
Units
Description
Usage
See also
MID_GASA
MID_GASB
Direction
Binding
Type
Value range
Units
Description
Usage
See also
MIDPOINTA
MIDPOINTB
Direction
Binding
Type
Value range
Units
Description
Usage
See also
2-36 Analyzer Variables
Bidirectional
MEASUREPOINT
Enumerated
Point 1; Point 2; Point 3
None
Allows the user to specify which of the three piecewise linear approximation points
he is dealing with.
The "Tweak" function allows the user to adjust up to three midscale points per range
in order to make the linearization curve go exactly through particular standard gases.
Bidirectional
None
String
31 characters
None
Unused. Intended to be the description of the parameter sets.
Unused.
Bidirectional
MID_GASA, MID_GASB
6-element floating point array
-1 - 1,000,000
ppm
Elements 1, 2 and 3 are the mid gas values as entered for range 1; the next three
points are those for range 2, and so on.
Allows the user to enter the desired gas values for the three midrange points on
each range. The "Tweak' function can then force the measured values to equal
these, interpolating other points between them.
Bidirectional
MIDPOINTA, MIDPOINTB
6-element floating point array
-1 - 1,000,000
ppm
Elements 1, 2 and 3 are the mid gas values as read for range 1; the next three points
are those for range 2, and so on.
See MID_GASA, MID_GASB. These are the measured values for those gases,
before they are forced to be equal to those values by the "Tweak" function.
NGA2000 Reference
Rosemount Analytical Inc. A Division of Emerson Process Management