PH1210
DIGITAL pH-METER AUTO CAL/DATA STORAGE
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If the memorized buffer solution value doesn’t correspond to the buffer solution used for the
calibration, proceed as follow:
[SHIFT]
push the key to read the memorized buffer solution value with the flashing cursor under the
digit
XX.XX pH
[INCR]
push the key to modify the last digit if necessary
[SHIFT]
push the key to position the cursor on the other digit to be modified with same procedure.
[ENTER]
push the key for 3 seconds to confirm the adjusted value.
At this point the procedure is same as the above procedure with the recognized buffer solutions.
We suggest to calibrate the second point with buffer pH=4.01 if the meter will operate in acidic range,
and with the buffer pH=9 if the meter will operate in the alkaline range.
It is possible to perform the calibration by using the buffer solutions pH=4.01 and pH=6.86.
We suggest to rinse the electrode in tap water after each dipping in the buffer solution, in order to
avoid their mixing and pollution.
In many applications it is enough to frequently perform only the zero calibration by using the buffer
close to the measuring value in the process, and the zero/sensitivity calibration periodically.
The error messages during the calibration inform the operator about the bad condition of the pH
electrode.
Verify the buffer solution and replace the electrode.
5.1.3 TEMPERATURE CALIBRATION
Automatic temperature
This calibration can be done when the Pt1000 sensor is connected and the user wants to adjust the
temperature readout in one point of the scale.
Dip the Pt1000 into the sample at known temperature.
[MODE]
push the key from the main display in order to reach the D2.0 display.
[Z.CAL]
push the key for 3 seconds.
It appears the D2.1 display and message
Zero cal
alternate to the temperature value.
[SHIFT]
push the key to read the temperature value with the flashing cursor on the last digit
XXX.X °C
or (°F)
INCR]
push the key to modify the last digit if necessary
[SHIFT]
push the key to position the cursor on the other digit to be modified with same procedure.
[ENTER]
push the key for 3 seconds to confirm the adjusted value.
At this point the procedure is same as the above steps.
The message
Update
indicates the new calibration values have been memorized.
If the new value is out of the accepted limits the display will show the error message
Zero Err
[ENTER]
push the key for 3 seconds to delete the message and to turn to main display
