EN-18 AB23PH Bench pH Meter
7. BUFFER GROUP
The meter automatically correct for the temperature dependence of the buffer group pH
value given in the following tables.
Buffer group 1
Temp °C pH1.68 pH4.01 pH7.00 pH10.01 pH12.45
5 1.67 4.01 7.09 10.25 13.21
10 1.67 4.00 7.06 10.18 13.00
15 1.67 4.00 7.04 10.12 12.81
20 1.68 4.00 7.02 10.06 12.63
25 1.68 4.01 7.00 10.01 12.45
30 1.68 4.01 6.99 9.97 12.29
35 1.69 4.02 6.98 9.93 12.13
40 1.69 4.03 6.97 9.89 11.98
45 1.70 4.05 6.97 9.86 11.84
50 1.71 4.06 6.96 9.83 11.70
Buffer group 2
Temp °C pH1.68 pH4.01 pH6.86 pH9.18 pH12.45
5 1.67 4.01 6.95 9.39 13.21
10 1.67 4.00 6.92 9.33 13.00
15 1.67 4.00 6.90 9.28 12.81
20 1.68 4.00 6.88 9.23 12.63
25 1.68 4.01 6.86 9.18 12.45
30 1.68 4.01 6.85 9.14 12.29
35 1.69 4.02 6.84 9.11 12.13
40 1.69 4.03 6.84 9.07 11.98
45 1.70 4.04 6.83 9.04 11.84
50 1.71 4.06 6.83 9.02 11.70