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Temperature Compensation
For accurate pH measurements and calibration, the temperature of the solution under
test must be known. This can be accomplished manually or automatically. Refer to the
steps for each, below, and determine the best method for the application.
Automatic Temperature Compensation
For Automatic compensation, use the supplied thermometer.
Perform these steps before each use or when the temperature of the solution under
test changes. Note that the thermometer can remain in the solution while taking pH
measurements.
1.
Select ‘pH ATC’ on the meter’s front panel slide-switch.
2.
Plug the supplied thermometer into the meter’s temperature sensor input jack.
3.
Place the other end of the thermometer into the solution under test.
4.
Perform a pH calibration or take a pH measurement.
Manual Temperature Compensation
Note: For Manual compensation, an external thermometer is required (not the one
supplied with the meter).
Perform these steps before each use or when the temperature of the solution under
test changes:
1.
Place a thermometer in the solution under test and note the reading.
2.
Select ‘pH MTC’ on the meter’s front panel slide-switch.
3.
Press the "MTC" key and the display will show 25.0
o
C. Using the ">>" key (for 1
o
C
steps) and the ">" key (for 0.1
o
C steps), edit the displayed temperature. Continue
editing until the displayed temperature equals the measured temperature noted
earlier.
4.
Perform pH calibration or take a pH measurement.
Note: If you are replacing the temperature probe with a new probe, please refer to the
temperature calibration section later in this manual.
