What To Do If; Technical Data - Xylem WTW Ag/S 800 DIN Mode D'emploi

Ag/S 800
Measured value
unstable
Slope too low
Measuring ranges
Reproducibility
pH range
Temperature range
Resistance
ba15350d04 12/2021

What to do if ...

Cause
– Inner junctions not
sufficiently wetted with
bridge electrolyte
– Inner junctions encrusted
– Ground junction
contaminated
– Cable broken
Cause
– Membrane surface
contaminated
– Conditioning time too short
– Standard solutions too old
– Inner junctions encrusted
– Electrode defective

Technical data

+
Ag 0.01 ... 108,000 mg/l
2-
S 0.003 ... 32,000 mg/l
± 2 % for silver; ± 4 % for sulfide
2 ... 12 (silver determination: pH < 8;
sulfide determination with SAOB II solution)
0 ... 80 °C (shortly up to 100 °C)
< 1 MΩ
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
– (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
-7
(10 ... 1 mol/l Ag
-7
(10 ... 1 mol/l S
What to do if ...
)
+
)
2-
)
23