Reference Manual
748384-C
September 2003
Rosemount Analytical Inc. A Division of Emerson Process Management
Introduction 1-33
NGA2000 Reference
f.
Analyzer Validity Status
The analyzer attempts to determine whether
its readings may be regarded as valid or
not. It looks at the operational state, and
the health state (both must be normal), the
sample flow (which must be above a mini-
mum value), the sample and other pres-
sures, its calibration state and whether it is
being fed the sample or a not-from-process
gas. It may also look another specific ana-
lyzer factors. If any of these are out of
specification or clearly inappropriate, it re-
ports its VALIDITY variable as INVALID.
This may be seen on the auxiliary lines, and
reported via the I/O module like the other
status variables.
Network variables: VALIDITY
