HACH LANGE sensION+ MM374 Manual Del Usuario página 20

Buffer solutions (DIN 19266)
Refer to Table 4 for pH values of specific buffer sets at varying
temperatures.
Table 4 pH and temperature values
Temperature
°C °F
5 32 1.668 4.004
10 50 1.670 4.000
20 68 1.675 4.001
25 77 1.679 4.006
30 86 1.683 4.012
40 104 1.694 4.031
50 122 1.707 4.057
60 140 1.723 4.085
70 158 1.743 4.126
80 176 1.766 4.164
90 194 1.792 4.205
Conductivity standard solutions
Refer to Table 5 for conductivity values of standard solutions at varying
temperatures.
Table 5 Conductivity and temperature values
Temperature
°C °F µS/cm
15.0 59 119
16.0 60.8 122
17.0 62.6 125
20 English
pH
6.951 7.087 9.395 10.245
6.923 7.059 9.332 10.179
6.881 7.016 9.225 10.062
6.865 7.000 9.180 10.012
6.853 6.987 9.139 9.966
6.838 6.970 9.068 9.889
6.833 6.964 9.011 9.828
6.836 6.968 8.962 —
6.845 6.982 8.921 —
6.859 7.004 8.885 —
6.877 7.034 8.850 —
Conductivity (EC)
µS/cm mS/cm
1147 10.48 92.5
1173 10.72 94.4
1199 10.95 96.3
Table 5 Conductivity and temperature values (continued)
Temperature
°C °F
18.0 64.4
19.0 66.2
20.0 68
13.207
21.0 69.8
13.003
22.0 71.6
12.627
23.0 73.4
12.454
24.0 75.2
12.289
25.0 77
11.984
26.0 78.8
11.705
27.0 80.6
11.449
28.0 82.4
—
29.0 84.2
—
30.0 86
—
31.0 87.8
32.0 89.6
33.0 91.4
34.0 93.2
35.0 95
mS/cm
Demal (D) and NaCl 0.05% EC standards
Refer to Table 6
Conductivity (EC)
µS/cm µS/cm
127 1225 11.19
130 1251 11.43
133 1278 11.67
136 1305 11.91
139 1332 12.15
142 1359 12.39
145 1386 12.64
147 1413 12.88
150 1440 13.13
153 1467 13.37
156 1494 13.62
159 1522 13.87
162 1549 14.12
165 1581 14.37
168 1609 14.62
171 1638 14.88
174 1667 15.13
177 1696 15.39
for conductivity values according to temperature.
mS/cm mS/cm
98.2
100.1
102.1
104.0
105.4
107.9
109.8
111.8
113.8
115.7
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