Endress+Hauser CCS50D, Operating Instructions Manual

Page: 30 / 52

Diagnostics and troubleshooting CCS50D
30 Hauser
Error Possible cause Remedy
Display value too low Membrane cap not screwed on fully
‣
Fill membrane cap with fresh electrolyte
→  34
‣
Screw membrane cap on fully
Membrane soiled
‣
Clean membrane →  32
Air bubble in front of membrane
‣
Release air bubble
Air bubble between cathode and
membrane
‣
Remove membrane cap, top up electrolyte
‣
Remove air bubble by tapping on the
outside of the membrane cap
‣
Screw on membrane cap
Input flow of medium too low
‣
Establish correct flow
Foreign oxidants interfering with
DPD reference measurement
‣
Examine medium, check chemicals
Use of organic disinfectants
‣
Use suitable agent (e.g. as per DIN 19643)
(water may need to be replaced first)
‣
Use suitable reference system
Display fluctuates
considerably Hole in membrane
‣
Replace membrane cap