ATI
Q46C2 2Electode Conductivity System
Part 10
– System Maintenance
53
O&M Manual
Rev-H (6/19)
The following messages will appear as items on the Fault List:
MESSAGE
DESCRIPTION
POSSIBLE CORRECTION
Sensor High
The raw signal from the sensor is too
high.
Check wiring connections to sensor.
Sensor Low
The raw signal from the sensor is too
low.
Check wiring connections to sensor.
Cond High
The conductivity reading is greater than
the maximum of the User-selected
range.
The conductivity reading is over operating
limits. Set measuring range to the next highest
level.
Temp High
The temperature reading is > 210 ºC. The temperature reading is over operating
limits. Check wiring and expected temp level.
Perform RTD test as described in sensor
manual. Recalibrate sensor temperature
element if necessary.
Temp Low
The temperature reading is < -10 ºC
The temperature reading is under operating
limits. Check wiring and expected temp level.
Perform RTD test as described in sensor
manual. Recalibrate sensor temperature
element if necessary.
TC Error
TC may be open or shorted.
Check sensor wiring and perform RTD test as
described in sensor manual.
Fault List display messages (continued):
MESSAGE
DESCRIPTION
POSSIBLE CORRECTION
Cond Cal Fail
Failure of conductivity calibration.
Clean sensor, get fresh cal solutions and redo
calibration. If still failure, sensor slope may be
less than 70% or greater than 130%. Perform
sensor tests as described in sensor manual.
Replace sensor if still failure.
TC Cal Fail
Failure of temperature calibration.
Clean sensor, check cal solution temperature
and repeat sensor temp calibration. TC
calibration function only allows adjustments of
+/- 6 ºC. If still failure, perform sensor tests as
described in sensor manual. Replace sensor if
still failure. Note that TC offset may also be
adjusted using the Cal TC Factor function (see
Section 5.23) which involves no calibration
reference solutions.
EEprom Fail
Internal nonvolatile memory failure
System failure, consult factory.
Chcksum Fail
Internal software storage error.
System failure, consult factory.
Display Fail
Internal display driver fail.
System failure, consult factory.
Range Cal
Fail
Failure of factory temperature
calibration.
Consult factory.
