1. O
2
Calibration Failed
2. Comb Calibration Failed
3. Calibration Warning
This alert indicates that the slope and constant values determined from the
calibration did not fall within an acceptable range.
Potential cause
If you have calibrated the transmitter correctly, this alarm may indicate that you
need to replace the sensor. Refer to Diagnostic alarms for details.
Recommended action
Check the calibration gas supplies and connections. Make sure the oxygen
concentrations of the calibration gases match the concentration values in the
transmitter.
Calibration Recommended
The Calibration Alerts tab may display Calibration Recommended. This alert
indicates that the sensor resistance has changed by a predetermined amount
since the last calibration.
Potential cause
Oxygen cells degrade over time due to aging and corrosion. An increasing cell
resistance is a good indicator of reduced cell performance. As the cell impedance
increases, the cell output falls off, and response time increases. Calibrating the
transmitter compensates for the increased cell resistance. If using the transmitter
with a Rosemount IMPS or SPS calibration sequencer, increased cell impedance
can automatically trigger a calibration.
Recommended actions
1. Check transmitter for accuracy.
2. Calibrate transmitter.
NV Memory Failure
The FF/Device Alerts tab and the transducer EEPROM Corrupt resource block may
display the following alerts:
1. Manufacturing
2. Block Integrity Error
3. NV Integrity Error
4. ROM Integrity Error
The non-volatile parameter storage on the CPU board has become unreliable.
Potential cause
This alarm generally occurs during start-up. Rarely, the transmitter could be
powered down while a parameter is being stored to the non-volatile memory. The
F
OUNDATION
™
Fieldbus Manual
December 2022 00809-0500-4880
124 Emerson.com/Rosemount
To Next Page
Loading...
