Section 9 Troubleshooting; Troubleshooting Error Messages - Hach 9186 Instrument Manual

Section 9

9.1 Troubleshooting Error Messages

Message Type Error Message
Measurement-related Error Messages
CONCENTRATION TOO HIGH
CONCENTRATION TOO LOW
TEMPERATURE ERROR
CURRENT TOO LOW
CURRENT TOO HIGH
Calibration-related Error Messages
∆T OUT OF LIMITS
OUT OF 4/20 mA
Troubleshooting
When an error occurs, the measurement values are replaced by dashes, (- - -).
Solution
Check the current value, along with the calibration parameters.
Check the current value, along with the calibration parameters.
Check for short-circuit or open circuit.
Negative current. Check the electrode (electrolyte and membrane).
Ensure that there are no short-circuits on the measurement chain. Check the
polarizing voltage.
The temperature difference between calibration and the theoretical sensor
response is greater than the allowed limit. Limits: ±20 °C
The measured value is out of the programmed scale range for analog outputs
1 and 2.
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