Hanna Instruments HI 2002 User Manual

Operational Guide 27
pH
Calibration
Calibration
Messages
• 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 options.
“CLEAR ALL” message will be displayed and the instrument will return to
measurement mode displaying “CAL DUE” message.
pH Bu er Temperature Dependence
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
The Calibration Check™ feature may  ag diagnostic messages during a
calibration. As electrode aging is normally a slow process, substantial changes
from previous calibrations are likely due to a temporary problem with the
electrode or bu ers that can be addressed easily. These messages are seen in
Standard and Basic modes.
Wrong Bu er
This message appears when the di erence between
the pH reading and the value of the selected bu er
is too great. If this error message is displayed, check
if you have selected the proper calibration bu er and
have poured the desired bu er.

Hanna Instruments HI 2002 Specifications

General

Brand	Hanna Instruments
Model	HI 2002
Category	Measuring Instruments
Language	English