Appendix; Conductivity Standards; Examples Of Temperature Coefficients (Α-Value); Conductivity To Tds Conversion Factors - OHAUS STARTER 300C Manual De Instrucciones

EN-14
7

APPENDIX

7.1

Conductivity standards

T(°C)
5
10
15
20
25
30
35
7.2 Examples of temperature coefficients (α-value)
Substance at 25 °C
HCl
KCl
CH3COOH
NaCl
H2SO4
HF
α-coefficients of conductivity standards for a calculation to reference temperature of 25°C
Standard
84 μS/cm
1413 μS/cm
12.88 mS/cm
7.3

Conductivity to TDS conversion factors

Conductivity
At 25 °C
447 μS
1413 μS
1500 μS
8974 μS
12.88 μS
80 mS
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STARTER 300C Portable Conductivity Meter
10 μS/cm
6.1 μS/cm
7.0 μS/cm
8.0 μS/cm
9.0 μS/cm
10.0 μS/cm
11.0 μS/cm
12.1 μS/cm
Concentration [%]
10
10
10
10
10
1.5
Measurement
temp.: 15°C
1.95
1.94
1.90
TDS KCl
ppm value
84 μS
40.38
225.6
744.7
757.1
5101
7447
15 μS
8759
52.168
GlobalTestSupply
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84 μS/cm 1413 μS/cm
53 μS/cm 896 μS/cm
60 μS/cm 1020 μS/cm
68 μS/cm 1147 μS/cm
76 μS/cm 1278 μS/cm
84 μS/cm 1413 μS/cm
92 μS/cm 1552 μS/cm
101 μS/cm 1667 μS/cm
Temperature coefficient α [%/°C]
1.56
1.88
1.69
2.14
1.28
7.20
Measurement Measurement
temp.: 20°C temp.: 30°C
1.95 1.95
1.94 1.94
1.89 1.91
Factor
0.5048
0.5047
0.527
0.5047
0.5685
0.5782
0.5839
0.6521
12.88 mS/cm
8.22 mS/cm
9.33 mS/cm
10.48 mS/cm
11.67 mS/cm
12.88 mS/cm
14.12 mS/cm
15.39 mS/cm
Measurement
temp.: 35°C
2.01
1.99
1.95
TDS NaCl
ppm value
38.04
215.5
702.1
737.1
4487
7230
8532
48.384
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Factor
0.4755
0.4822
0.4969
0.4914
0.5000
0.5613
0.5688
0.6048