Hanna Instruments Edge - Ph Calibration

Operational Guide
38
used, or clean the electrode by following the Cleaning Procedure (see
page 76). If necessary, change the buer or the electrode.
• If the buer temperature exceeds the temperature limits of the buer,
“WRONG BUFFER TEMPERATURE” will be displayed.
• Press CLR after entering calibration to clear all calibration parameters.
“CLEAR ALL” message will be displayed and the instrument will return to
measurement mode displaying “CAL DUE” message.
pH Buer Temperature Dependence
The temperature has an eect on pH. The calibration buer solutions are
aected by temperature changes also. During calibration the instrument will
automatically calibrate to the pH value corresponding to the temperature.
During calibration the instrument will display the pH buer value at 25 ºC.
TEMP pH BUFFERS
ºC ºF 1.679 3.000 4.010 6.862 7.010 9.177 10.010 12.454
0 32 1.670 3.072 4.007 6.982 7.130 9.459 10.316 13.379
5 41 1.670 3.051 4.002 6.949 7.098 9.391 10.245 13.178
10 50 1.671 3.033 4.000 6.921 7.070 9.328 10.180 12.985
15 59 1.673 3.019 4.001 6.897 7.046 9.273 10.118 12.799
20 68 1.675 3.008 4.004 6.878 7.027 9.222 10.062 12.621
25 77 1.679 3.000 4.010 6.862 7.010 9.177 10.010 12.450
30 86 1.683 2.995 4.017 6.851 6.998 9.137 9.962 12.286
35 95 1.688 2.991 4.026 6.842 6.989 9.108 9.919 12.128
40 104 1.693 2.990 4.037 6.837 6.983 9.069 9.881 11.978
45 113 1.700 2.990 4.049 6.834 6.979 9.040 9.847 11.834
50 122 1.707 2.991 4.062 6.834 6.978 9.014 9.817 11.697
55 131 1.715 2.993 4.076 6.836 6.979 8.990 9.793 11.566
60 140 1.724 2.995 4.091 6.839 6.982 8.969 9.773 11.442
65 149 1.734 2.998 4.107 6.844 6.987 8.948 9.757 11.323
70 158 1.744 3.000 4.123 6.850 6.993 8.929 9.746 11.211
75 167 1.755 3.002 4.139 6.857 7.001 8.910 9.740 11.104
80 176 1.767 3.003 4.156 6.865 7.010 8.891 9.738 11.003
85 185 1.780 3.002 4.172 6.873 7.019 8.871 9.740 10.908
90 194 1.793 3.000 4.187 6.880 7.029 8.851 9.748 10.819
95 203 1.807 2.996 4.202 6.888 7.040 8.829 9.759 10.734
pH
Calibration