Practical Salinity Scale (Unesco 978); Conductivity To Tds Conversion Factors - Mettler Toledo FiveGo FG3 Bedienungsanleitung

Appendix
8.3 Practical salinity scale (UNESCO 1978)
In the Five conductivity meters the salinity is calculated according to the official definition of UNESCO
978. Therefore the salinity S
pressure is calculated as follows:
a = 0.0080
0
a = -0.692

a = 25.385
2
a = 4.094
3
a = -7.026
4
a = 2.708
5
8.4

Conductivity to TDS conversion factors

Conductivity
At 25 °C
84 μS
447 μS
43 μS
500 μS
8974 μS
2.880 μS
5.000 μS
80 mS
6
Five_cond.indb 16
of a sample in psu (practical salinity unit) at standard atmospheric
psu
b = 0.0005
0
b = -0.0056

b = -0.0066
2
b = -0.0375
3
b = 0.0636
4
b = -0.044
5
(32.4356 g KCl per 000 g of solution)
TDS KCl
ppm value Factor
40.38 0.5048
225.6 0.5047
744.7 0.527
757. 0.5047
50 0.5685
7447 0.5782
8759 0.5839
52.68 0.652
METTLER TOLEDO FiveEasy™ / FiveGo™ conductivity meter
k = 0.0062
TDS NaCl
ppm value Factor
38.04 0.4755
25.5 0.4822
702. 0.4969
737. 0.494
4487 0.5000
7230 0.563
8532 0.5688
48.384 0.6048
13.03.2007 16:07:42