ProMinent
®
Page 42
pH
pH cal1
recogn.
T = 20.3 ˚C
pH cal1
calibr.
T = 20.3 ˚C
pH cal1
end = or cal2 = CAL
T = 20.3 ˚C
4.02 4.01 4.04
The progress of the buffer detection is indicated by a time bar. The calcu-
lation of the calibration parameters begins automatically after the buffer
detection. This is also indicated by a time bar.
If you have selected sensor as the detection method for the buffer temper-
ature, the current measured buffer temperature is displayed under “T”. If you
have selected manual, the manually entered buffer temperature is displayed
under “T”.
The buffer value can be corrected during calibration using the / arrow
keys. If the sensor signal is unstable the time bar will wait until it becomes
stable.
왘 After completion of this calibration stage the display shows the next
menu option for 1 point calibration:
The buffer value can be corrected once again at this point using the arrow
keys / .
Progress from this point onwards depends upon whether you have selected a
1 point calibration or a 2 point calibration (recommended!).
1 point
calibration 왘 Press the enter key
to end 1 point calibration.
The zero point is calibrated if the buffer value is between 5.5 pH and 8.0 pH.
The slope is calibrated if the buffer value is less than 5.5 pH or greater than
8.0 pH.
왘 Proceed as for “conclude calibration”.
2 point
calibration 왘 For a 2 point calibration remove the pH probe from the first buffer
solution, rinse and immerse in the second buffer solution.
왘 Press the CAL key
to restart automatic buffer detection.
Buffer detection and calibration take place as described above.
Operating the DMT
BA_DM_163_03_08_GB.p65 26.03.2008, 10:20 Uhr42
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