Emerson Rosemount OCX8800C Manual page 111

Oxygen and combustibles analyzer for hazardous areas
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Manual
00809-0500-4881
Table 8-3: Transducer Block Parameter Descriptions
Parameter mnemonic
COMB_FAILED_SLOPE
COMB_HTR_DUTYCYCLE
COMB_PERCENT_OF_RANGE
COMB_PREVIOUS_CONSTANT
COMB_PREVIOUS_SLOPE
COMB_PRIMARY_VALUE
COMB_PRIMARY_VALUE_
RANGE
COMB_PRIMARY_VALUE_TYPE
COMB_REFERENCE_OHMS
COMB_SECONDARY_VALUE
COMB_SECONDARY_VALUE_
RANGE
COMB_SENSOR_CAL_DATE
COMB_SENSOR_EXCITATION
COMB_SENSOR_TYPE
COMB_SETPOINT
Rosemount OCX8800C
Valid range
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
(continued)
Units
ppm/Ohms
N/A
%
ppm
ppm/Ohms
N/A
N/A
N/A
Ohms
N/A
N/A
N/A
mA
N/A
° C
F
Fieldbus
OUNDATION
April 2023
Description
This is the slope value
calculated from the
last failed combustibles
calibration.
Combustibles heater duty
cycle.
The percent of range of
the current combustibles
reading.
The combustibles
calibration constant from
the previous good
calibration.
The combustibles
calibration slope from the
previous good calibration.
The value and status of the
combustibles concentration
reading.
The high and low range
limit values, the engineering
units code, and the number
of digits to the right of
the decimal point for the
combustibles reading.
See FF-903, Section 3.3
The raw value of the
combustibles reference
input.
The combustibles cell
temperature. This is
determined from the
value of the combustibles
reference resistance
temperature device (RTD).
The high and low range
limit values, the engineering
units code, and the number
of digits to the right
of the decimal point
for the combustibles cell
temperature reading.
See FF-903, Section 3.3
Combustible reference
current.
See FF-903, Sections 3.3 and
4.3.
Combustibles heater
temperature set point.
111

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