Conductivity Standards Table; Examples Of Temperature Coefficients (Alpha-Values) - Mettler Toledo SevenCompact S230 Instrucciones De Manejo

11.2 C onductivity standards table
International
T 10 84
[°C] [µS/cm] [µS/cm]
0 6.13 53.02
10 7.10 60.34
15 7.95 67.61
20 8.97 75.80
25 10.00 84.00
30 11.03 92.19
35 12.14 100.92
Chinese
T 146.5
[°C] [µS/cm]
15 118.5
18 126.7
20 132.2
25 146.5
35 176.5
Japanese
T ( 1330.00
[°C] [µS/cm]
0 771.40
5 911.05
10 1050.70
15 1190.35
20 1330.00
25 1469.65
30 1609.30
35 1748.95
11.3 E xamples of temperature coefficients (alpha-values)
Substance at 25°C
HCl
KCl
CH COOH
3
NaCl
H SO
2 4
HF
-coefficients of conductivity standards for a calculation to reference temperature 25 °C
Standard Measurement
temp.: 15 °C
84 µS/cm 1.95
1413 µS/cm 1.94
12.88 mS/cm 1.90
500 1413
[µS/cm] [µS/cm]
315.3 896
359.6 1020
402.9 1147
451.5 1278
500.0 1413
548.5 1552
602.5 1667
1408
[µS/cm]
1141.4
1220.0
1273.7
1408.3
1687.6
133.00
[µS/cm]
77.14
91.11
105.07
119.04
133.00
146.97
160.93
174.90
Concentration
[%]
10
10
10
10
10
1.5
Measurement
temp.: 20 °C
1.95
1.94
1.89
12.88 Saturated NaCl
[mS/cm] [mS/cm]
8.22 134.5
9.33 177.9
10.48 201.5
11.67 226.0
12.88 251.3
14.12 277.4
15.39 304.1
12.85 111.3
[mS/cm] [mS/cm]
10.455 92.12
11.163 97.80
11.644 101.70
12.852 111.31
15.353 131.10
26.6
[µS/cm]
15.428
18.221
21.014
23.807
26.6
29.393
32.186
34.979
Temperature coefficient alpha
[%/°C]
1.56
1.88
1.69
2.14
1.28
7.20
Measurement Measurement
temp.: 30 °C temp.: 35 °C
1.95 2.01
1.94 1.99
1.91 1.95
Appendix 45