Hanna Instruments HI 84529 - Manual (Page 29)

www. hannainst .com 29 Operational Guide
pH Buffer
Temperature
Dependence
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.
Temp pH Buffers
ºC ºF 4.01 7.01 8.20 10.01
0 32 4.01 7.13 8.38 10.32
5 41 4.00 7.10 8.34 10.24
10 50 4.00 7.07 8.31 10.18
15 59 4.00 7.04 8.27 10.12
20 68 4.00 7.03 8.23 10.06
25 77 4.01 7.01 8.30 10.01
30 86 4.02 7.00 8.17 9.96
35 95 4.03 6.99 8.14 9.92
40 104 4.04 6.98 8.11 9.88
45 113 4.05 6.98 8.08 9.85