Consort P901 Mode D'emploi page 9

(P903)
The pH of each solution varies with the temperature. Therefore it is impossible
to accurately compare pH readings unless they are corrected to a reference tem-
perature. This model features a unique microprocessor controlled system, which
helps you completely to overcome the problem of non linear temperature cor-
rection curves for the species to be measured. There is no need to keep sample
temperatures close to each other, since a special temperature curve for any type
of sample can be plotted in the non-volatile memory. Temperature corrected pH
readings should not be confused with the normal temperature compensation!
1. Select [MAIN MENU] by pressing MODE.
2. Select [SET-UP], [pH/°C CORRECTION] and press CAL.
3. Select whe ther or not tempera ture cor rec ted pH rea dings should be dis played
and press CAL.
4. Select [REFERENCE] and press CAL.
5. Select the temperature to which all future mea sure ments will be refer red to
and press CAL.
6. Select [RECORD CURVE] and press CAL.
7. Prepare the sample solution to be measured in a thermostatic bath with mag-
netic stirrer and immerse the electrodes in it. Its temperature should be about
5°C lower than the lowest value you may possibly need during future measure-
ments. The display shows °C and pH of the sample. Wait a while to enable the
electrodes to adapt themselves to the new temperature. Press HOLD, when
readings are stable, to store the values in memory. Increase the temperature
with at least 5°C and repeat the same procedure for as many temperatures
as necessary. When the temperature has reached about 5°C more than the
highest value you need for future measurements, press CAL to stop the tem-
perature tracing.
8. To view the recorded curve on the display, select [SHOW CURVE] and press
CAL. Press PRINT to print the curve in table format.
1. Select [MAIN MENU], [°C] by pressing MODE. Without Pt1000, adjust the
manual temperature compensation and proceed by pressing MODE. Should
you want to recalibrate, press CAL.
2. Immerse the Pt1000 in a standard solution of known temperature. Calibrate to
the proper value and press CAL.
P901 • P902 • P903 P901 • P902 • P903
Temperature correction Temperature correction
Temperature measurement
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