Hanna-instruments HI 222 Manual do Utilizador descarregar pdf (Página 30)

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 corre-

sponding to the measured or set temperature.

TEMP pH VALU

ºC ºF 1.68 4.01 6.86 7.01

0321.67 4.01 6.98 7.13

5411.67 4.00 6.95 7.10

10 50 1.67 4.00 6.92 7.07

15 59 1.67 4.00 6.90 7.04

20 68 1.68 4.00 6.88 7.03

25 77 1.68 4.01 6.86 7.01

30 86 1.68 4.02 6.85 7.00

35 95 1.69 4.03 6.84 6.99

40 104 1.69 4.04 6.84 6.98

45 113 1.70 4.05 6.83 6.98

50 122 1.71 4.06 6.83 6.98

55 131 1.72 4.07 6.84 6.98

60 140 1.72 4.09 6.84 6.98

65 149 1.73 4.11 6.85 6.99

70 158 1.74 4.12 6.85 6.99

During calibration the instrument will display the buffer value at 25 °C.

pH VALUES AT DIFFERENT

TEMPERATURES

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 39 40

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Hanna-instruments HI 222 Manual do Utilizador Página 30