Xylem wtw Cl 800 DIN, Руководство по эксплуатации

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20
ba15355d04 12/2021
Aging Cl 800

Reducing agents

Interfering ions: 10 % error with the following concentration ratio
(concentration ratio = interfering ion / measured ion):
Aging
Please note that every electrode undergoes a natural aging process.
The response time increases and the slope decreases with the age of the
electrode. The following factors shorten the lifetime considerably:

Unsuitable storing conditions (see section S
TORAGE
)

Special measuring conditions (e.g. organic solutions, frequent measure-
ment with high concentrations of interfering ions)

High temperatures

High changes in temperature
The warranty does not cover damage caused by measuring conditions and
mechanical damage.
Maintenance

Combination electrodes:
Refill any used up bridge electrolyte.

In the case of increased response times of the electrode perform the fol-
lowing activities:
– Polish the membrane surface using an SF/K polishing strip (see section
R
ECOMMENDED ACCESSORIES
). To do so, moisten a polishing strip with
deionized water, and with circular movements polish the membrane
surface for approx. 30 seconds.
– Then recondition the electrode (see section C
ONDITIONING
,
CALIBRATION
,
MEASUREMENT
).

Clean the inside of the combination electrode. To do so, open the
combination electrode as follows:
Opening the
combination
electrode
OH
-
Br
-
I
-
S
2-
CN
-
NH3 S
2
O
3
2-
80 3x10
-3
5x10
-7
1x10
-6
2x10
-7
0.12 0.01
1 Unscrew the knurled nut from the connection head.
2 Position the connection cable upward in a straight line with the con-
nection head.
3 Unscrew the connection head.