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3 sensor troubleshooting, Troubleshooting – Hach-Lange 5740 sc User Manual

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Troubleshooting

6.3 Sensor Troubleshooting

Table 5 Sensor Troubleshooting

Problem

Cause

Resolution

Sensor reading remains at 0 or
max. value for 24 hours or more

Membrane is punctured

Compare reading to measurement obtained by a
hand-held DO sensor. If different, Replace sensor
cartridge.
Call Customer Service.

Cannot calibrate the sensor

Sensor module or sensor
membrane is bad.

Replace sensor cartridge. Recalibrate the sensor.
Call Customer Service.