Xylem WTW SenTix HW-T 900, Operating Manual

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SenTix
®
HW-T 900(-P) General information
5
ba77090e03 06/2021
2.2 Commissioning
Scope of delivery  Electrode SenTix
®
HW-T 900(-P
)

Operating manual
Commissioning
The electrode is filled with reference electrolyte solution in the factory. Pre-
pare the electrode for measuring as follows:

Open the refilling opening for the reference electrolyte solution. Depend-
ing on the model, the stopper of the refilling opening is an elastomer stop-
per or a slider.
The refilling opening must always be open during calibration and
measurement!
 Remove the watering cap from the electrode tip. Possible salt deposits in
the area of the watering cap do not affect the measuring characteristics
and can easily be removed with deionized water.
 Connect the electrode to the meter
 Calibrate the electrode according to the operating manual of the meter.
When doing so, observe the general rules on the following page.
Ground junction of
SenTix
®
HW-
T 900 ( -P
)
With the ground junction of the SenTix
®
HW-T 900 (-P
)
electrodes, the elec-
trode outflow can be adjusted with a thread:
 Hold the electrode with the pH glass membrane pointing downward. Using
the provided special wrench, open the ground junction until some electro-
lyte solution can be seen to come out of the junction and all ground sur-
During longer storing periods, salt sediments may develop on the
watering cap and the refilling opening. The salt sediments do not
affect the measuring characteristics.

Remove any salt sediments with deionized water.
 Refill the reference electrolyte solution when the filling level is
low (see chapter section 5 M
AINTENANCE AND CLEANING
).
Please keep the watering cap. It is required for the electrode to
be stored. Always keep the watering cap clean.
Refilling
opening
Refilling
opening
2
1