Hanna Instruments Edge HI 2020 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 previous calibrations stored on
probe. “CLEAR CALIBRATION” message will be displayed. Press CFM. The
instrument will return to measurement mode displaying the “CAL DUE”
message.
• If measured value diers more than expected “CHECK ELECTRODE CHECK
BUFFER“ will be displayed. Take appropriate action, cleaning the probe if
necessary or refreshing the pH buer.
pH Buer Temperature Dependence
Calibration buers are aected by temperature. During calibration with standard
pH buers (not Custom), the instrument will display the pH buer value at 25 ºC,
however, it will use the appropriate value for that buer at the temperature of
the buer for the calibration. Immediately after exiting calibration, the buer
will read its value at the temperature of measurement.
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 probe
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.
w ww . . co m
information@itm.com1.800.561.8187

Hanna Instruments Edge HI 2020 Specifications

General

Brand	Hanna Instruments
Model	Edge HI 2020
Category	Measuring Instruments
Language	English