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Operating the DMT
pH
pH
T = 20.3 ˚C
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
keys. If the sensor signal is unstable the time bar will wait until it becomes
stable.
Progress from this point onwards depends upon whether you have selected a
1 point calibration or a 2 point calibration (recommended!).
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.
2 point
calibration
Buffer detection and calibration take place as described above.
Page 42
4.02
cal1
pH
recogn.
T = 20.3 ˚C
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
/
.
Press the enter key
Proceed as for "conclude calibration".
For a 2 point calibration remove the pH probe from the first buffer
solution, rinse and immerse in the second buffer solution.
Press the CAL key
4.01
cal1
pH
calibr.
end =
T = 20.3 ˚C
to end 1 point calibration.
to restart automatic buffer detection.
4.04
cal1
or cal2 = CAL
/
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