User Guide

27
pH VALUES AT VARIOUS
TEMPERATURE
Temperature has an effect on pH. The calibra-
tion buffer solutions are effected by tempera-
ture changes to a lesser degree than normal
solutions.
During calibration the meter will automatically
calibrate to the pH value corresponding to the
measured temperature (if used in conjunction
with the HI7669/2W temperature probe) or to
the manually set temperature.
TEMP pH VALUES
°C °F 4.01 6.86 7.01 9.18 10.01
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
32
41
50
59
68
77
86
95
104
113
122
131
140
149
158
4.01
4.00
4.00
4.00
4.00
4.01
4.02
4.03
4.04
4.05
4.06
4.07
4.09
4.11
4.12
6.98
6.95
6.92
6.90
6.88
6.86
6.85
6.84
6.84
6.83
6.83
6.84
6.84
6.85
6.85
7.13
7.10
7.07
7.04
7.03
7.01
7.00
6.99
6.98
6.98
6.98
6.98
6.98
6.99
6.99
9.46
9.39
9.33
9.27
9.22
9.18
9.14
9.10
9.07
9.04
9.01
8.99
8.97
8.95
8.93
10.32
10.24
10.18
10.12
10.06
10.01
9.96
9.92
9.88
9.85
9.82
9.79
9.77
9.76
9.75
For instance, if the buffer's temperature is
25°C, the display will show pH 4.01 or
7.01 or 10.01.
If the buffer's temperature is 20°C, the display
will show pH 4.00/7.03/10.06.
If the buffer's temperature is 50°C, the display
will show pH 4.06/6.98/9.82.