Appendix, 2 ph temperature dependency – KROHNE SMARTSENS PH 8150 EN User Manual
Page 42
8
APPENDIX
42
SMARTSENS PH 8150
www.krohne.com
11/2013 - 4002543602 - MA SMARTSENS PH 8150 R02 en
8.2 pH temperature dependency
The output from a pH sensor varies with the temperature in a predictable way. The size of the
variation depends on both the temperature and the pH being measured.
At pH 7 and 25°C / 77°F the temperature error is zero. If temperature or pH changes the
temperature error is calculated using the following formula:
0.03 pH difference / pH or 0.03 pH difference / K
°
C
°
F
pH
pH
pH
pH
pH
pH
pH
pH
pH
pH
pH
pH
5
41
2.30
3.24
4.18
5.12
6.06
7.00
8.06
9.12
10.18 11.24 12.30 13.36
15
59
2.15
3.12
4.09
5.06
6.03
7.00
8.03
9.06
10.09 11.12 12.15 13.18
25
77
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00 11.00 12.00 13.00
35
95
1.85
2.88
3.91
4.94
5.97
7.00
7.97
8.94
9.91
10.88 11.85 12.82
45
113
1.70
2.76
3.82
4.88
5.94
7.00
7.94
8.88
9.82
10.76 11.70 12.64
55
131
1.55
2.64
3.73
4.82
5.91
7.00
7.91
88.2
9.73
10.64 11.55 12.46
65
149
1.40
2.52
3.64
4.76
5.88
7.00
7.88
8.76
9.64
10.52 11.40 12.28
75
167
1.25
2.40
3.55
4.70
5.85
7.00
7.85
8.70
9.55
10.40 11.25 12.10
85
185
1.10
2.28
3.46
4.64
5.82
7.00
7.82
8.64
9.46
10.28 11.10 11.92
95
203
0.95
2.16
3.37
4.58
5.79
7.00
7.79
8.58
9.37
10.16 10.95 11.74
.book Page 42 Monday, November 18, 2013 11:05 AM