Appendix; Conductivity Standards; Examples Of Temperature Coefficients (Α-Value); Conductivity To Tds Conversion Factors - OHAUS 3100C Manual De Instrucciones

EN-18
7

APPENDIX

7.1

Conductivity standards

T(° C)
5
10
15
20
25
30
35
Examples of temperature coefficients (α-value)
7.2
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 Measurement
temp.: 15° C
84 μS/cm
1.95
1413 μS/cm
1.94
12.88 mS/cm 1.90
7.3

Conductivity to TDS conversion factors

Conductivity
At 25 ° C
84 μS
447 μS
1413 μS
1500 μS
8974 μS
12.88 μS
15 μS
80 mS
STARTER 3100C Bench 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.: 20° C
1.95
1.94
1.89
TDS KCl
ppm value
40.38
225.6
744.7
757.1
5101
7447
8759
52.168
84 μS/cm 1413 μS/cm
53 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
temp.: 30° C
1.95
1.94
1.91
Factor
0.5048
0.5047
0.527
0.5047
0.5685
0.5782
0.5839
0.6521
12.88 mS/cm
896 µS/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
Factor
0.4755
0.4822
0.4969
0.4914
0.5000
0.5613
0.5688
0.6048