Xylem MJK pHix Compact, Руководство пользователя, Страница: 27 / 39

pHix® Compact
EN 4.10 Version 2007
Buffer adjustment / Buffer adjustment using the switch ring
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with the same value. When the value is found, pHix® Compact will automatically
set the 0-point or span to the correct value, and the LED will indicate this with
two short flashes every 5 seconds.
pHix® Compact is now ready either for measurement or for another buffer
adjustment at another pH value.
pHix® Compact determines automatically if zero point or span needs to be
adjusted depending of the electrode's zero point and the preceding buffer
values.
If pHix® Compact cannot find the pH value for the selected buffer solution, it
will go into alarm mode, which is indicated with continuous LED flashes every
second.
Note! There is only need for calibration of two (buffer-) values, for example, 4-7
pH / 7-10 pH.
Example of buffer adjustment in pH 4 and 7
With the switch ring in position M , flush the electrode tip in water.
Carefully, wipe of the electrode tip with a cloth. Never use materials that
can scratch the measuring lens. (The LED gives one short flash every 5.
sec.)
Turn the switch ring from position
M to position 7 , and dip the electrode
tip into the pH 7 buffer solution. (The LED will now begin to give three
short flashes every 5 sec.). When the buffer adjustment has finished
successfully, the LED will start to give two short flashes every 5 sec. The
zero point is now set.
Carefully, wipe of the electrode tip with a cloth. Never use materials that
can scratch the measuring lens. Turn the switch ring from position
7 to
position 4 , and dip the electrode tip into the pH 4 buffer solution. (The
LED will now begin to give three short flashes every 5 sec.). When the
buffer adjustment has finished successfully, the LED will start to give two
short flashes every 5. sec. The span angle is now set.