EUTECH INSTRUMENTS CD 650, Инструкция по эксплуатации

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(a) (b)
Figure 17: pH Calibration Screens
4. Rinse the electrode in clean water and prepare electrode for calibration.
5. Dip the probe in calibration buffer. The tip of the probe must be completely
immersed into the solution. Stir the probe gently to create a homogeneous
solution.
6. The display shows the pH reading. The meter scans through all the
available (un-calibrated) points for the selected buffer group until it finds a
close match within its acceptable calibration window. Once a match is
found, the display shows the ‘Stable’ indicator.
7. Press ENTER key to confirm the calibration.
8. Rinse the probe with clean water.
9. Place it in the next buffer and follow steps 5 and 7 to calibrate other points.
Function Keys available in pH Calibration mode:
TEMP (F1) Goes to temperature calibration
CLR-C (F2) Clears previous calibration (if any) after ENTER key is pressed in
confirmation screen
NEXT (F3) Shows calibration report
ESC (F4) Exits from calibration and goes back to pH measurement mode
ENTER Confirms the calibration
(Not functional)
Note: If you wish to completely re-calibrate the meter, you need to clear
previous calibration data. Press CLR-C (F2) key to clear previous
calibration. The meter shows your confirmation screen. Press ENTER
key to confirm deleting previous calibration. Once cleared, you need to
calibrate the first point that corresponds to your selected buffer group.