Xylem wtw Cl 800 DIN Mode D'emploi page 20

Aging
Opening the
combination
electrode
20
 Reducing agents
 Interfering ions: 10 % error with the following concentration ratio
(concentration ratio = interfering ion / measured ion):
- -
OH Br
-3
80 3x10
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
 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
deionized water, and with circular movements polish the membrane
surface for approx. 30 seconds.
– Then recondition the electrode (see section C
,
CALIBRATION MEASUREMENT

Clean the inside of the combination electrode. To do so, open the
combination electrode as follows:
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.
- 2-
I S CN
-7 -6
5x10 1x10 2x10
). To do so, moisten a polishing strip with
).
-
NH3 S O
2 3
-7
0.12 0.01
)
TORAGE
,
ONDITIONING
ba15355d04
Cl 800
2-
12/2021