YSI TruLine 15 - Manual (Page 6)

6 T 814239 04/2014
Commissioning, measuring, calibration TruLine
Commissioning, measuring, calibration
Commissioning The combination electrode is filled with reference electrolyte solution in the
factory. Prepare the combination electrode for measuring as follows:
 Open the refilling opening for the reference electrolyte solution
The refilling opening must always be open during calibration and
measurement!
Refilling
opening
 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 combination electrode to
be stored. Always keep the watering cap clean.
 Calibrate the combination electrode according to the operating manual of
the meter and observe the following rules while doing so:
Calibration
and measurement:
General rules
 Make sure the refilling opening for the reference electrolyte solution is
open.
 Avoid the displacement 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 combination electrode with the so-
lution that follows. Alternatively, you can also rinse the combination
electrode with deionized water and then carefully dab it dry.
 Immerse the combination electrode in the solution in a vertical or slightly
tilted position.
 Make sure the immersion depth is correct. The junction must be complete-
ly submersed in the solution. The junction is in the area of the bottom end
of the shaft (see figure). At the same time, the level of the reference elec-
trolyte must be at least 2 cm above the level of the solution.