Appendix; Conductivity Standards; Examples Of Temperature Coefficients (Α-Value) - Mettler Toledo Education Line EL30 Instrucciones De Manejo

8.

Appendix

8.1

Conductivity standards

T( °C)
5
0
5
20
25
30
35
8.2 Examples of temperature coefficients (α-value)
Substance at 25 °C
HCl
KCl
CH COOH
3
NaCl
H SO
2 4
HF
α-coefficients of conductivity standards for a calcualation to reference tempearture of 25°C
Standard
84 µS/cm
1413 µS/cm
12.88 mS/cm
METTLER TOLEDO Education Line conductivity meter
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84 µS/cm 1413 µS/cm
53 μS/cm 896 μS/cm
60 μS/cm 020 μS/cm
68 μS/cm 47 μS/cm
76 μS/cm 278 μS/cm
84 μS/cm 43 μS/cm
92 μS/cm 552 μS/cm
0 μS/cm 667 μS/cm
Concentration [%]
0
0
0
0
0
.5
Measurement Measurement
temp.: 15°C temp.: 20°C
.95 .95
.94 .94
.90 .89
12.88 mS/cm
8.22 mS/cm
9.33 mS/cm
0.48 mS/cm
.67 mS/cm
2.88 mS/cm
4.2 mS/cm
5.39 mS/cm
Temperature coefficient α [%/°C]
.56
.88
.69
2.4
.28
7.20
Measurement
temp.: 30°C
.95
.94
.9
Appendix
Measurement
temp.: 35°C
2.0
.99
.95
5
13.03.2007 16:28:05