Hach-Lange NH4D sc Ammonium Sensor - Manual (Page 36)

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Troubleshooting
6.3.2 Troubleshooting during calibration
Symptom Possible cause Corrective actions
SENSOR CODE Sensor code entered incorrectly
Using the certificate, check whether the
sensor code was entered correctly. If not
havin
g the certificate, carry out "Factory
Calibration" (Factory cal).
CALIBRATING Data transfer from software 1.3x has failed
Carry out a completely new calibration: a)
sensor code or factory calibration, b) suitable
matrix correction
AMMONIUM
OFFSET
Error in the last ammonium calibration, sensor
cartridge too old, contaminated, faulty
Repeat the calibration.
Use the previous calibration.
Clean or replace the sensor cartridge.
SLOPE
Error in the last ammonium calibration, sensor
cartridge too old, contaminated, faulty
Repeat the calibration.
Use the previous calibration.
Clean or replace the sensor cartridge.
POTASSIUM
OFFSET
Error in the last potassium calibration, sensor
cartridge too old, contaminated, faulty
Repeat the calibration.
Use the previous calibration.
Clean or replace the sensor cartridge.
SLOPE
Error in the last potassium calibration, sensor
cartridge too old, contaminated, faulty
Repeat the calibration.
Use the previous calibration.
Clean or replace the sensor cartridge.