Commissioning - Xylem WTW CN 500 DIN Instrucciones De Operación

Commissioning

Combination
electrode CN 800
Double rod
electrode
CN 500 + R 503
20
Commissioning
Danger
When dealing with acidic solutions that contain cyanide, there is dan-
ger of poisoning by released hydrocyanic acid. It is imperative to add
the alkaline reagent MZ/NH3/CN to any sample in order to raise the pH
value of the sample to > 10 and prevent the release of hydrocyanic acid.
Carry out cyanide determinations in acidic media with special safety
measures only, e.g. in a fume hood.
1 Remove the storage vessel.
2 Fill the bridge electrolyte ELY/BR/503 into the filling opening.
3 Shortly press the shaft of the combination electrode against the con-
nection head to wet the ground junction with bridge electrolyte.
4 When doing so refill any spilled bridge electrolyte so that the inner
junctions are covered with bridge electrolyte.
5 Rinse the combination electrode with deionized water.
6 Wipe the shaft using a clean paper towel.
For measurements with the CN 500 electrode, a reference electrode is re-
quired (e.g. R 503). The two electrodes together form a double rod combina-
tion electrode.
1 Put the reference electrode into operation (see operating manual of
the reference electrode).
2 Remove the protection cap of the electrode.
3 Rinse the electrode with deionized water.
4 Wipe the shaft using a clean paper towel.
CN 500 / CN 800
ba15356e03 03/2015