Xylem wtw NO 800 DIN, Руководство по эксплуатации

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ba15362d04 12/2021
Aging NO 800
Aging
Please note that every electrode undergoes a natural aging process. The re-
sponse time increases and the slope decreases with the age of the electrode.
The following factors shorten the lifetime considerably:

Incorrect storage

Special measuring conditions (e.g. organic solutions, frequent measure-
ment with high concentrations of interfering ions)

High temperatures and high temperature changes
The warranty does not cover damage caused by measuring conditions and
mechanical damage.
Maintenance

Combination electrodes:
Refill any used up bridge electrolyte.

Install an exchange membrane cap.
NOTE
Never pull the connection cable of the electrode.
The cable might be damaged.
Storage
Between two
measurements
Condition the electrode in standard solution.
Overnight Rinse the combination electrode with deionized water and dry it. Then put on
the storage vessel and store the electrode upright.
Longer than over-
night
Remove the bridge electrolyte, then rinse the combination electrode with
deionized water and dab it dry with a clean paper towel. Store the combi-
nation electrode in the storage vessel in a dry place. For the following
measurement, prepare the combination electrode as described in section
C
OMMISSIONING
.
ClO
4
-
I
-
ClO
3
-
CN
-
Br
-
NO
2
-
HS
-
HCO
3
-
1x10
-4
0.005 0.05 0.1 0.7 0.7 1 10
CO
3
2-
Cl
-
H
2
PO
4
-
HPO
4
2-
PO
4
3-
OAc
-
F
-
SO
4
2-
20 30 50 50 50 200 600 1000