What To Do If - wtw F 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 (F 800)
– Inner junctions encrusted
(F 800)
– Ground junction
contaminated (F 800)
– Cable broken
Cause
– Membrane surface
contaminated
– Conditioning time too short
– Standard solutions too old
– Inner junctions encrusted
(F 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
– Clean the membrane surface (see
M )
AINTENANCE
– 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
F 500 / F 800
ba15358e03 03/2015