Xylem SensoLyt WQL - Manual (Page 4)

Commissioning, measuring, calibration SensoLyt
®
WQL
10 ba75823e01 10/2009
Commissioning, measuring, calibration
Commissioning Prepare the combination electrode for measuring as follows:
z 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.
Note
Please keep the watering cap. It is required for the electrode to be stored.
Always keep the watering cap clean.
z Install the electrode in the logger (see operating manual of the logger).
z Calibrate the electrode according to the operating manual of the logger
and observe the following rules while doing so:
Calibration
and measurement:
General rules
z Avoid the carryover of any solution (sample or buffer solution) from one
measurement to the next by taking the following measures:
– Shortly rinse the calibration and sample beakers with the solution the
beakers are to be filled with next.
– Between measurements, rinse the electrode with the solution that fol-
lows. Alternatively, you can also rinse the electrode with deionized wa-
ter and then carefully dab it dry.
z To measure in aqueous solutions, it is recommended to immerse the elec-
trode in a vertical or slightly tilted position.
z Observe the correct depth of immersion and make sure the contact be-
tween the junction and test sample is thorough. The junction (hole junc-
tion) is in the area of the bottom end of the shaft.
z For measurements in aqueous solutions, provide approximately the same
stirring conditions for measuring as for calibrating.
Note
Keep the protective head mounted to the logger during calibration and
measurement in order avoid damage to the pH membrane.
Subsequent
calibrations
The frequency of subsequent calibrations depends on the application.
Junction