Focustronic Alkatronic, Руководство пользователя

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Calibration procedure
1. Go to main menu and select ”Calibrate”, then select ”pH
electrode”.
2. Rinse the electrode carefully in RO or distilled water, and
then wipe the electrode carefully without touching the
glass tip .
3. Place the electrode in pH 7.00 solution, then press the
”pH 7”-button.
4. On the LCD you will now see a message to wait 2 minutes
to let the pH electrode to stabilize. Do not touch any
buttons during those 2 minutes. The machine will wait the
2 minutes automatically.
5. After 2 minutes a message will appear ” Calibration 7.00-
OK ”. If it says ”Calibration failed” then just press the pH 7
button again and wait. This ”OK”-message will be followed by a short series of
the new calibrated pH-values, which should be very close to 7.00. This is just for
information and a further confirmation that the calibration data was correct.
6. Now rinse the electrode very carefully in RO or distilled water, and wipe o ff
carefully with water, but do not touch the glass bulb.
7. Place the electrode in pH 4.00 calibration fluid, and press the ”pH 4” button.
8. On the LCD you will again see a message to wait 2 minutes to let the pH
electrode stabilize. Do not touch any buttons during those 2 minutes. The
machine will wait the 2 minutes automatically.
9. After 2 minutes a message will appear ”Calibration 4.00-OK”. If it says
”Calibration failed” then just press the pH 4 button again and wait. This message
will be followed by a short series of the new calibrated pH-values, which should
be very close to 4.00. This is just for information and a further confirmation that
the calibration data was correct.
10. Now the electrode is calibrated! Do not forget to rinse it again before placing it in
machine.
Now place the electrode in its proper position in the holder and
make sure it is located correctly in the test-beaker. Use the
rubber ring to make the electrode to be still in its proper
position,
which is around 2-3 cm above the bottom of the
measuring beaker. Do not place it too close to the bottom,
it must never touch the rotating magnetic rod!
If this is the first time you start the machine, there will now
probably be no water in the test-vial, so in that case
immediately press ”Prime Hose Pump A” to manually fill
the test vial with around 50 ml water (not important to be exact 50 ml).
It is extremely important that the pH electrode is never dry, so do this
immediately if the test-vial is empty.