Tss Diagnostics - ABB AWT420 Operating Instruction

90 AW T4 2 0 | U N I V E R S A L 4 - W I R E , D U A L- I N P U T T R A N S M I T T E R | O I/A W T4 2 0 - E N R E V. B
...16 Troubleshooting
...Diagnostic messages

TSS diagnostics

NAMUR Diagnostic
icon message
S(n):
ADC Failure
S(n):
Memory Failure
S(n):
PV Failure
S(n):
Wiper Failed
S(n):
Calibrating
S(n):Recovery
S(n):
Clean Inhibited
S(n):
Cal Failed
Cause
Failure of the analog to digital converter in the
sensor/sensor module.
Sensor configuration data is corrupt, or the
sensor's non-volatile memory is faulty.
The sensor configuration may be affected and
changes may not be maintained after power
cycle.
A primary variable reading cannot be obtained
from the turbidity sensor because the LED is not
illuminating the sample.
The wiper has failed to wipe.
Sensor becomes soiled. Measurement quality
is affected due to inadequate cleaning.
Sensor calibration is in progress.
Recovery diagnostic is active during the period
between completion of a sensor calibration and
the sensor being ready to make accurate
measurements.
Automatic cleaning with the wiper is inhibited
by configuration.
The quality of the Turbidity/Suspended Solids
measurement is affected and the sensor
lifespan may be reduced.
The most recent sensor calibration has failed,
calibration coefficients have not been updated
and the previous values continue to be applied.
Recovery action
Cycle power to the transmitter.
If Sensor ADC Failure persists, contact local service organization.
Cycle power to the transmitter.
If Sensor Memory Failure persists, check all configuration parameters for
all sensors and correct any errors. Save the configuration to SD card or
via Bluetooth App.
Reset the sensor to defaults from the Sensor Setup menu and reload the
saved configuration.
If Sensor Memory Failure persists, contact local service organization.
Ensure that the sensor is clean: If available, initiate a Manual Clean from
the Operator menu, otherwise remove the sensor from the process and
clean manually.
Cycle power to the transmitter.
If PV Failure persists, contact local service organization.
Visually inspect the sensor and clean any obstructions/blockages.
Diagnostic clears once calibration is complete.
Diagnostic clears once recovery is complete.
Perform a Manual Clean from the operator menu.
Set the Wiper Clean Frequency.
Ensure that the sensor is clean: If available, initiate a Manual Clean from
the Operator menu, or remove the sensor from the process and clean
manually.
If using formazine standards, ensure that the solutions have been
correctly made up.
Note: Formazine preparations settle in the solution, shake the solution
well prior to the calibration.
Repeat calibration, if Calibration Failed persists, consider replacing the
sensor.