Hanna Instruments HI 84429 - Manual (Page 23)

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The temperature has an effect on pH. The calibration buffer solutions are affected by temperature
changes to a lesser degree than normal solutions. During calibration the instrument will
automatically calibrate to the pH value corresponding to the measured or set temperature.
During calibration the instrument will display the pH buffer value at 25 ºC.
P M E T S R E F F U B H p
C º F º 1 0 . 4 0 0 . 6 0 3 . 8
0 2 3 1 0 . 4 2 1 . 6 8 4 . 8
5 1 4 0 0 . 4 9 0 . 6 4 4 . 8
0 1 0 5 0 0 . 4 6 0 . 6 1 4 . 8
5 1 9 5 0 0 . 4 4 0 . 6 7 3 . 8
0 2 8 6 0 0 . 4 2 0 . 6 3 3 . 8
5 2 7 7 1 0 . 4 0 0 . 6 0 3 . 8
0 3 6 8 2 0 . 4 9 9 . 5 7 2 . 8
5 3 5 9 3 0 . 4 8 9 . 5 4 2 . 8
0 4 4 0 1 4 0 . 4 7 9 . 5 1 2 . 8
pH BUFFER TEMPERATURE DEPENDENCE
Notes: • To clear a previous calibration and to return to the default value, press Clear at any
time after entering calibration mode. The “Calibration cleared” message will be
shown for a few seconds on the display. If Clear is invoked during the first
calibration point the instrument returns to the measurement mode.
• The Clear key is displayed only if a previous calibration exists.