ProMinent DULCOTEST CDR 1 series Betriebsanleitung Seite 66

Troubleshooting
Fault
Measured value display
is 0.
Measured value display
unsteady.
When you have tried everything: Check whether the reference electrode at the end of the elec‐
trode shaft is silvery-white instead of brownish-grey. The reference electrode is then worn out and
can be replaced by ProMinent.
66
Possible cause
Troublesome substances in
the water.
ClO content below the lower
2
measuring range limit.
Sensor incorrectly connected
to the controller.
Run in period too short.
Sensor faulty.
Air bubbles on the outside of
the diaphragm.
Diaphragm damaged.
Cause lies in the control
device.
Remedy
Check water for troublesome sub‐
stances and remedy this.
Add ClO and then repeat calibration
2
and/or use a suitable sensor.
Connect the sensor correctly to the
controller.
Allow to run-in for 3 hours.
Replace sensor.
Remove air bubbles by tapping them
and increase flow rate if necessary.
Replace diaphragm cap, allow sensor
to run in, calibrate it.
Eliminate cause