Emerson NGA2000 Reference Manual page 112

Reference Manual
748384-C
September 2003
RNGLO
Direction
Binding
Type
Value range
Units
Description
Usage
See also
SELFTEST
Direction
Binding
Type
Value range
Units
Description
Usage
See also
SENSOR_OFFS
Direction
Binding
Type
Value range
Units
Description
Usage
See also
2-50 Analyzer Variables
Analyzer: bidirectional; 1/0 module: input
RNGLO
4-element floating point array
Between 0 and RNGHI
ppm
The lower range end points, element 1 being the lower end point for range 1 etc.
The range definition, together with RNGHI. RNGLO cannot be edited higher than the
equivalent element in RNGHI using the control module, and should not be made so
through a PC either. RNGLO is normally set to 0, but it is possible to operate the
analyzer on a "Suppressed range" by setting RNGLO to a higher value. Note that the
analyzer accuracy, noise and drift specification are based on ranges with a low end
point of zero. It is still best to zero the analyzer on a zero gas if possible, but again it
is possible to use a non-zero gas, as long as the user is prepared to iterate between
zeros and spans as required.
RNGHI
Output
None
FID: 1 O-element enumerated array; HFID: 11 -element enumerated array
Pass; Fail
None
EEPROM test result (FID only)
EPROM test result
RAM test result
Power supply test result
Network test result
20-bit ADC test result
12-bit ADC test result
Power supply board test result
Safety board test result
Case temperature test result
Oven / sample temperature test.
The results of the self test when the FID or HFID is powered or started up.
GENERALSTATE
Bidirectional
None
Integer
0 - 4096; default 1000 (CLD)
None
CLD: the value for the DAC count providing the hardware sensor offset voltage.
NDIR and PMD: defines the analog offset in the signal circuitry. Not used as an
adjustment.
CLD: Used to provide an offset for the analog circuitry. This value is not changed in
operation.
NDIR and PMD: An offset in the analog circuitry. This is not used, and should not be
altered.
NGA2000 Reference
Rosemount Analytical Inc. A Division of Emerson Process Management