Xylem wtw F 800 DIN, Operating Manual

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Aging F 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:

Unsuitable storing conditions (see section S
TORAGE
)

Special measuring media (e.g. organic solutions)

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:
– In the case of organic coatings clean the membrane with isopropanol
and a soft paper towel.
– 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 elec-
trode
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 Condition the combination electrode in standard solution with the filling
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.
4 Push the connection head and pressure spring over the connection
cable.
5 Push the inner body out of the shaft.