What To Do If - Xylem WTW CN 500 DIN Instrucciones De Operación

What to do if ...

Measured value
unstable
Slope too low
26
What to do if ...
Cause
– Inner junctions not
sufficiently wetted with
bridge electrolyte
(CN 800)
– Inner junctions encrusted
(CN 800)
– Ground junction
contaminated (CN 800)
– Cable broken
Cause
– Membrane surface
contaminated
– Conditioning time too short
– Standard solutions too old
– Inner junctions encrusted
(CN 800)
– Electrode defective
Remedy
– Fill up bridge electrolyte until the inner
junctions are covered with bridge
electrolyte
– Leave the bridge electrolyte to react on
the inner junctions for some hours until
the crusts have dissolved.
– Rinse ground junction with bridge
electrolyte
– Exchange the electrode
Remedy
– Polish the membrane surface with
polishing strip S/FK (see M
– Extend the conditioning time
– Use new standard solutions
– Leave the bridge electrolyte to react on
the inner junctions for some hours until
the crusts have dissolved.
– Exchange the electrode
CN 500 / CN 800
)
AINTENANCE
ba15356e03 03/2015