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tion to ensure safety and limit unnecessary further damage. Contact the factory.
8.1 Calibration Failure
Calibrations will fail if the adjustments to the reading are outside of the normal range for a properly functioning system.
Refer to the instruction manual for the specific sensor being used for further information.
8.1.1 Copper or Nickel Sensors
The calibration offset will fail if the adjustment is outside of -10 to +10.
Possible Cause
Corrective Action
Dirty sensor
Clean or etch sensor
Water/Sample Calibration has not been performed, or per-
formed incorrectly
Perform a Water/Sample Calibration
Condensation inside sensor
Allow sensor to dry out. Replace desiccant.
Faulty sensor cable or photodetector
Repair or replace sensor
Faulty sensor receptacle on controller
Replace
8.1.2 pH Sensors
The calibration will fail if the adjustment to the gain is outside of 0.2 to 1.2, or if the calculated offset is outside of
-140 to 140.
Possible Cause
Corrective Action
Dirty electrode
Clean electrode
Improper wiring of sensor to controller
Correct wiring
Incorrect temperature reading or setting
Ensure that the temperature is accurate
Incorrect cable length or wire gauge setting
Set to the correct values
Faulty electrode
Replace electrode
Faulty preamplifier
Replace preamplifier
8.1.3 Contacting Conductivity Sensors
The calibration will fail if the adjustment to the gain is outside of 0.5 to 2.0.
Possible Cause
Corrective Action
Dirty electrode
Clean electrode
Improper wiring of sensor to controller
Correct wiring
Wrong cell constant entered
Program the controller cell constant setting at the value
that matches the electrode being used
Incorrect temperature reading or setting
Ensure that the temperature is accurate
Incorrect cable length or wire gauge setting
Set to the correct values
Faulty electrode
Replace electrode
8.1.4 Electrodeless Conductivity Sensors
The calibration will fail if the adjustment to the gain is outside of 0.2 to 10, or the offset is outside of -10,000 to
10,000.
Possible Cause
Corrective Action
Dirty sensor
Clean sensor
Improper wiring of sensor to controller
Correct wiring
Sensor placed too close to container walls
Relocate sensor
