Maintenance; Disposal - Grundfos Conex DIS-D Montage- Und Betriebsanleitung

®
Conex DIS-PR
Fault
1. Measured-value
display unsteady.
2. Display at full-scale
value.
3. With pH
measurement, the
display is constantly
approx. pH 7.00, and
with redox
measurement 0 mV.
4. Fault during or after
calibration.
5. Measured-value
display has sluggish
response.
If faults in the measurement: Refer to the
Note
installation and operating instructions of
the respective electrode or measuring cell.

12. Maintenance

The device is maintenance-free.
Repairs can only be carried out in the factory by
authorized specialists.

13. Disposal

This product or parts of it must be disposed of in an
environmentally sound way. Use appropriate waste
collection services. If this is not possible, contact the
nearest Grundfos company or service workshop.
26
Cause
a) Interferences on lines from
combination electrode to Conex
DIS.
b) Distance between combination
electrode and Conex
long.
c) Connection cables/plugs
between combination electrode
®
and Conex DIS interrupted or
moist.
d) Air pockets on the combination
electrodes for pH or redox.
e) Combination electrode faulty.
a) Connection cable between
combination electrode and
®
Conex DIS interrupted.
b) Combination electrode faulty.
a) Short-circuit in connection cable
between electrode and Conex
DIS, moisture in the plug
connectors.
b) Combination electrode faulty.
a) Combination electrode
contaminated, too old or faulty.
b) Used buffer solutions too old.
a) Combination electrode
contaminated.
b) Combination electrode too old.
Remedy
Check the screen/cable and cable
®
routing.
Check the cables and replace, if
®
DIS too necessary. Position instrument max. 3
m away from combination electrode.
Check cables, and establish
connection. Possibly replace
combination electrode if water enters
the sensor head.
Check supply of sample water and
modify, if necessary.
Replace the combination electrode.
Check the cable, and establish
connection.
Replace the combination electrode.
Check cables, and eliminate
®
short-circuit. Eliminate moisture or
replace cables.
Replace the combination electrode.
Clean the combination electrode
according to supplied description, or
replace.
Renew the buffer solutions.
Clean the combination electrode
according to supplied description.
Replace the combination electrode, if
necessary.