Specifications

3. Operation MI 611-211 – October 2005
25
NOTE
Values in Table 9 are based on commercially available technical buffers used in some
parts of Europe. pH values are at 25°C. Chemical formulas are as follows:
4.61 pH: 0.1 molar Sodium Acetate; 0.1 molar Acetic Acid
7.00 pH: 0.026 molar Potassium Dihydrogen Phosphate;
0.041 molar Disodium Hydrogen Phosphate
9.21 pH: 0.05 molar Sodium Tetraborate Decahydrate (Borax)
Config Passcode
(Refer to “Structure Diagram 5” on page 42.)
NOTE
This parameter is not displayed if the transmitter is locked (i.e., the correct passcode
was not entered for Configuration).
This section of the structure asks you to specify the Minor and Major Passcode. The Minor
passcode limits access to routine maintenance functions including
CALIBRATION and output
HOLD. The Major passcode prohibits unauthorized personnel from changing the configuration
parameters. Each is a 4-character string between 0000 and 9999. They may or may not be the
Table 9. European Buffer Tables
Temperature
° C
4.61 pH 7.00 pH 9.21 pH
pH Value pH Value pH Value
0 7.12 9.52
5 7.09 9.45
10 4.64 7.06 9.38
15 4.62 7.04 9.32
20 4.61 7.02 9.26
25 4.61 7.00 9.21
30 4.61 6.99 9.16
35 4.62 6.98 9.11
40 4.63 6.97 9.07
45 4.64 6.97 9.03
50 4.66 6.97 8.99
55 4.67 6.97 8.96
60 4.69 6.98 8.93
70 4.71 7.00 8.88
80 7.04 8.83
90 7.09 8.79
95 7.12 8.77