System design
28 Edition 01/2016 multi EA 4000
4.4 Cl module
The Cl module consists of the following main components:
Wide range coulometer for amperometry
Stirring/cooling block for the measuring cells
Measuring cells with electrodes
Sulfuric acid container, possibly with splitting outlet and safety container
Splitting valve
Buffer container as pressure compensation to compensate the switching pulses of
the splitting valve
Adsorption tube
Halide trap
The control electronics for the multi EA 4000 Cl is also located in the Cl module.
halide trap
measuring cell with electrodes
stirring/cooling block
Fig. 10 Cl module
4.4.1 Coulometer assembly and measuring cell
The measuring cell is available in 2 versions:
"sensitive" measuring cell
40 ml
measuring cell 150 ml
Electrolyte volume approx. 20 ml approx. 120 ml
Measuring range – ab-
solute Cl (without
measuring gas splitting)
1 – 100 μg 10 – 1000 μg
Measuring range
(with measuring gas
splitting)
1 – 2 mg abs. Total chlorine 10 – 20 mg abs.
Total chlorine
Stirring principle Magnetic stirring Magnetic stirring