ABB AX400 Series User Manual

Single and dual input analyzers for pH/Redox (ORP)
AX416, AX436, AX460, AX466 & AX468 Appendix A – Buffer Solutions
68 IM/AX4PH Rev. P
Tem p NIST Buffers
ºC ºF 4.01 pH 6.86 pH 9.18 pH
0 32 4.003 6.982 9.460
5 41 3.998 6.949 9.392
10 50 3.996 6.921 9.331
15 59 3.996 6.898 9.276
20 68 3.999 6.878 9.227
25 77 4.004 6.863 9.183
30 86 4.011 6.851 9.143
35 95 4.020 6.842 9.107
40 104 4.030 6.836 9.074
45 113 4.042 6.832 9.044
50 122 4.055 6.831 9.017
55 131 4.070
60 140 4.085
65 149
70 158 4.120
75 167
80 176 4.160
85 185
90 194 4.190
95 203 4.210
Table A.4 NIST Buffer Solutions
Tem p US Technical Buffers
ºC ºF 4.01 pH 7pH 10.01 pH
0 32 4.000 7.118 10.317
5 41 3.998 7.087 10.245
10 50 3.997 7.059 10.179
15 59 3.998 7.036 10.118
20 68 4.001 7.016 10.062
25 77 4.005 7.000 10.012
30 86 4.011 6.987 9.966
35 95 4.018 6.977 9.925
40 104 4.027 6.970 9.889
45 113 4.038 6.965 9.857
50 122 4.050 6.964 9.828
55 131 4.064 6.965
60 140 4.080 6.968
65 149 4.097 6.974
70 158 4.116 6.982
75 167 4.137 6.992
80 176 4.159 7.004
85 185 4.183 7.018
90 194 4.208 7.034
95 203 4.235 7.052
Table A.5 US Technical Buffer Solutions

ABB AX400 Series Specifications

General

Display	LCD with backlight
Output	4 to 20 mA, HART
Process connection	Flanged
Lining material	PTFE, PFA
Electrode material	Stainless steel, titanium
Communication	HART