12
Automatic Temperature Compensation
Automatic Temperature Compensation (ATC) only occurs when using an
ISFET pH probe (built-in temperature sensor) or when a BNC pH electrode is
used with the separate temperature plug attached. After calibration is
complete and the meter is in the pH mode, the pH values displayed will be
temperature compensated. If no temperature plug is attached when using a
BNC electrode, automatic temperature compensation is disabled and the
meter temperature display will default to 25
o
C.
The table below shows the pH values of buffers at various temperatures.
Nominal
Value
25
o
C 0
o
C
5
o
C
10
o
C 20
o
C 30
o
C 40
o
C 50
o
C
1.68
1.67
1.67
1.67
1.67
1.68
1.69
1.71
4.01
4.00
4.00
4.00
4.00
4.01
4.03
4.06
6.86
6.98
6.95
6.92
6.87
6.85
6.84
6.83
7.00
7.12
7.09
7.06
7.01
6.99
6.97
6.97
9.18
9.46
9.40
9.33
9.23
9.14
9.07
9.02
10.01
10.32
10.25
10.18
10.06
9.97
9.89
9.83
12.45
13.42
13.21
13.00
12.63
12.29
12.04
11.70
Summary of Contents for IQ150
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