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Input Calibration
142 UDA2182 Universal Dual Analyzer Product Manual January 2009
Calibration functions
Calibrating the pH Offset (Standardization) –. In auto buffer recognition calibration,
you can select one of the other buffer pH values directly above or below the
recognized buffer value in the current buffer group. (See Table 8-1.)
Calibrating the Slope - In auto buffer recognition calibration, you can select one of the
other buffer pH values directly above or below the recognized buffer value in the
current buffer group. (See Table 8-1.)
Table 8-1 Standard pH Buffer Values
Temperature °C 0 5 10 15 20 25 30 35 40 45 50
Group Buffer
NIST/USP 1.68
1.67 1.67 1.67 1.67 1.68 1.68 1.68 1.69 1.69 1.70 1.71
4.01
4.01 4.00 4.00 4.00 4.00 4.01 4.01 4.02 4.03 4.04 4.06
6.86
6.98 6.95 6.92 6.90 6.88 6.86 6.85 6.84 6.84 6.83 6.83
9.18
9.46 9.40 9.33 9.28 9.23 9.18 9.14 9.10 9.07 9.04 9.01
12.45
13.42 13.21 13.01 12.80 12.64 12.45 12.30 12.13 11.99 11.84 11.71
USA 2.00
2.01 2.01 2.01 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00
4.00
4.01 3.99 4.00 3.99 4.00 4.00 4.01 4.02 4.03 4.04 4.06
7.00
7.13 7.10 7.07 7.05 7.02 7.00 6.99 6.98 6.97 6.97 6.97
10.00
10.34 10.26 10.19 10.12 10.06 10.00 9.94 9.90 9.85 9.82 9.78
12.00
12.60 12.44 12.28 12.14 12.00 11.88 11.79 11.66 11.53 11.43 11.32
Europe 1.00
0.98 0.98 0.99 0.99 1.00 1.00 1.01 1.01 1.01 1.01 1.02
3.00
3.02 3.02 3.02 3.02 3.00 3.00 2.99 2.99 2.98 2.98 2.97
6.00
6.03 6.02 6.01 6.00 6.00 6.00 6.00 6.01 6.02 6.04 6.05
8.00
8.15 8.11 8.07 8.03 8.00 7.97 7.94 7.91 7.88 7.87 7.86
10.00
10.22 10.17 10.12 10.05 10.00 9.95 9.90 9.86 9.82 9.78 9.74
13.00
13.81 13.60 13.39 13.19 13.00 12.83 12.68 12.53 12.38 12.25 12.11