Table 8-3: Transducer Block Parameter Descriptions
(continued)
Parameter mnemonic Valid range Units Description
O2_PREVIOUS_CONSTANT N/A mV The O
2
calibration
constant from the
previous good
calibration.
O2_PREVIOUS_IMPEDANCE N/A Ohms The impedance value
from the previous good
calibration.
O2_PREVIOUS_SLOPE N/A mV/Decade The O
2
calibration slope
from the previous good
calibration.
O2_PRIMARY_VALUE N/A N/A The value and status of
the O
2
concentration
reading.
O2_PRIMARY_VALUE_RANG
E
N/A N/A 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 O
2
reading.
O2_PRIMARY_VLUE_TYPE N/A N/A See FF-903, Section 3.3.
O2_SECONDARY_VALUE N/A N/A The temperature of the
O
2
cell.
O2_SENSOR_CAL_DATE N/A N/A See FF-903, Section 3.3.
O2_SENSOR_CAL_LOC N/A N/A See FF-903, Section 3.3.
O2_SENSOR_CAL_METHOD N/A N/A See FF-903, Section 3.3
and Section 4.3.
O2_SENSOR_CAL_WHO N/A N/A See FF-903, Section 3.3.
O2_SENSOR_INPUT N/A mV The raw value of the O
2
sensor input.
O2_SENSOR_TYPE N/A N/A See FF-903, Section 3.3
and Section 4.3.
O2_SETPOINT N/A ° C O
2
heater temperature
set point.
O2_SLOPE 34.5-47.5 mV/Decade The O
2
calibration slope.
O2_T90 0-300 Seconds The amount of time that
the O
2
process variable
will take to reach 90% of
the actual process
variable.
O2_TEMP_MAX N/A ° C The highest O
2
temperature read since
power on.
FOUNDATION
™
Fieldbus Manual
December 2022 00809-0500-4880
136 Emerson.com/Rosemount
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