ProMinent DULCOTEST CDE 2-mA-2 ppm Montage- Und Betriebsanleitung Seite 62

Faults, Fault Detection and Troubleshooting
Fault
The sensor's meas‐
ured value is 0 ppm
and an error mes‐
sage appears on
the
measuring/control unit
.
The sensor's meas‐
ured value is
unstable.
Fig. 8: Probes
1 Working electrode (material: gold).
2 Counter and reference electrode (material: silver with silver chloride, galvanically coated).
62
Possible cause
Sensor connected to the measuring/
control unit with incorrect polarity.
Measuring line broken.
ClO content below the lower meas‐
2
uring range limit.
Sensor faulty.
Measuring /control unit faulty.
Diaphragm damaged.
Air bubbles on the outside of the dia‐
phragm.
The cause lies with the measuring/
control unit.
1
2
Remedy
Connect sensor correctly to the
measuring /control device.
Replace measuring line.
Increase ClO
recalibrate and/or use a suitable
sensor.
Return sensor for regeneration.
Check the measuring/control unit
using a sensor simulator (DULCOM‐
ETER
1004042), repair if faulty.
Replace diaphragm cap; allow
sensor to run in and calibrate.
Remove air bubbles by tapping them
and increase flow rate if necessary.
Eliminate cause.
A2420
content and then
2
® Simulator, order no.