3. Remove the sensor from the analytical measurement chamber:
- Unscrew the nut of the analytical measurement chamber.
- Remove the nut from the sensor.
4. While the sensor is still connected to the power supply, fix it
with a fastener in the beaker.
5. When the sensor displays a stable value, take a sample with a
pipette from the beaker and perform a DPD-1 measurement.
6. After the calibration, put back the sensor into the analytical
measurement chamber.
9.4. Troubleshooting
9.4.1. LED signalling on the trace sensor
with order code 565164
One orange LED and one green LED show the status of the sensor:
LED
LED
status
Meaning Recommended actions
Green
ON
Correct operation
of the sensor
—
OFF or
flashing
Supply voltage is
too low
→ Increase the value of
the supply voltage.
Orange
OFF
Correct operation
of the sensor
—
ON
The sensor is not
correctly wired
→ Wire the sensor
according to chap. 7.
Flashing
The concentration
of the chlorine in
the water is too high
→ Reduce the chlorine
concentration. See
chap. 6.3.
26
Maintenance and troubleshooting
Type 8232
english
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