Maintenance schedule
The maintenance schedule shows minimum intervals for regular maintenance tasks. Perform
maintenance tasks more frequently for applications that cause electrode fouling.
Note: Do not disassemble the probe for maintenance or cleaning.
Maintenance task
Recommended minimum frequency
Clean the sensor
90 days
Inspect the sensor for damage
90 days
Calibrate the sensor
As recommended by regulatory agencies
Clean the sensor
Clean the exterior of the sensor with a soft, wet cloth.
Note: If the sensor cap must be removed for cleaning, do not expose the interior of the cap to direct sunlight for
extended periods of time.
Set or change the clean interval
Application conditions may need shorter or longer durations between manual sensor cleanings. The
default clean interval is 0 days. To change the interval, refer to the steps in this procedure.
1.
Go to MENU>SENSOR SETUP>[Select Sensor]>SETTINGS>CLEANING INTERVAL.
2.
Change the shown value as needed. Confirm the change.
• To turn off the clean interval, set the value to '0'.
Change the sensor cap
W A R N I N G
Potential explosion hazard. The sensor setup cap is not rated for hazardous location use.
Replacement sensor caps and setup caps are shipped with installation instructions. Refer to the
included instructions to change the cap. After the new sensor cap is installed, make sure that the lot
number on the sensor cap is the same lot number that is read by Modbus. The sensor uses the
calibration information from the sensor cap.
For best performance and accuracy, replace the sensor cap:
• Every two years, or more frequently if necessary
• When routine inspection shows significant erosion of the sensor cap
Troubleshooting
Diagnostic and test menu
The diagnostic and test menu shows current and historical information about the LDO sensor.
To access the diagnostic and test menu, go to MENU>SENSOR SETUP>[Select
Sensor]>MAINTENANCE.
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