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Anne MannAug 18, 2025
What to do if my Hach Accessories say 'CAL OVERDUE'?
- DDonna ChungAug 18, 2025
If your Hach Accessories display a 'CAL OVERDUE' message, you should calibrate the sensor.
To Next PageTo Next PageWhat to do if my Hach Accessories say 'CAL OVERDUE'?
If your Hach Accessories display a 'CAL OVERDUE' message, you should calibrate the sensor.
What to do if my Hach Accessories say 'NOT CALIBRATED'?
If the Hach Accessories show 'NOT CALIBRATED', you should calibrate the sensor.
What does 'REPLACE SENSOR' mean on my Hach Accessories, and what should I do?
If the Hach Accessories display 'REPLACE SENSOR' because the sensor has been in operation for more than 365 days, calibrate the sensor with a reference solution and reset the sensor days. If the calibration fails, call technical support.
What to do if my Hach Accessories displays 'ADC FAILURE'?
If the Hach Accessories show 'ADC FAILURE' because the analog to digital conversion failed, ensure that the sensor module is fully inserted into the controller connector. If the issue persists, replace the sensor module.
Why is my Hach Accessories showing 'SENS OUT RANGE'?
The Hach Accessories display 'SENS OUT RANGE' because the sensor signal is outside of the accepted limits for the cell constant that is used. To resolve this, make sure that the sensor is configured for the correct cell constant.
What to do if my Hach Accessories show 'MEAS TOO HIGH'?
If the Hach Accessories show 'MEAS TOO HIGH' because the measured value is > 2,000,000 µS/cm, 1,000,000 ppm or 20,000 ppt, make sure that the sensor is configured for the correct cell constant.
What to do if my Hach Accessories show 'MEAS TOO LOW'?
If the Hach Accessories display 'MEAS TOO LOW' because the measured value is < 0 µS/cm, 0 ppm or 0 ppt, make sure that the sensor is configured for the correct cell constant.
What does it mean when my Hach Accessories say 'OUTPUTS ON HOLD'?
If the Hach Accessories display 'OUTPUTS ON HOLD', the outputs will become active after the selected time period.
What does 'ZERO TOO HIGH' mean on my Hach Accessories?
If the Hach Accessories display 'ZERO TOO HIGH' because the zero calibration value is > 500,000 counts, make sure that the sensor is held in air during zero calibration and is not located near radio frequency or electromagnetic interference. Also, ensure that the cable is shielded by metal conduit.
Why is my Hach Accessories showing 'TEMP TOO HIGH'?
The Hach Accessories display 'TEMP TOO HIGH' because the measured temperature is > 130 °C. To resolve this, make sure that the sensor is configured for the correct temperature element.
General| Brand | Hach |
|---|---|
| Model | Polymetron Series |
| Category | Accessories |
| Language | English |
Steps to enter sensor identification and adjust data handling options.
Steps to define the unique zero point of the conductivity sensor before calibration.
Adjusts sensor reading to match a reference solution value.
Calibrates the sensor using a sample from the actual process.
Using an ohmmeter to test sensor resistance for calibration failures.
Displays and explains error codes and their resolutions for sensor issues.
