Endress+Hauser Analytik Jena multi EA 4000, Operating Manual

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Function and setup multi EA 4000
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1 Adsorption tube
2 Halide trap
3 Measuring cell with electrodes
4 Stirrer/cooling block
Figure 12 Cl module
3.4.1 Coulometer assembly and measuring cell
The measuring cell is available in 2 versions:
"sensitive" measuring cell
40 ml "high concentration"
measuring cell 150 ml
Electrolyte volume approx. 20 ml approx. 120 ml
Measuring range – absolute
Cl (without measuring gas
splitting) 1 – 100 μg 10 – 1000 μg
Measuring range
(with measuring gas split-
ting)
1 – 2 mg abs. Total chlorine
10 μg – 20 mg abs.
Total chlorine
Stirring principle Magnetic stirring Magnetic stirring
Indication principle Alternating current bi-am-
perometry Alternating current bi-am-
perometry
Generation principle anodic silver dissolution anodic silver dissolution
Generator current dynamic up to 1 mA dynamic up to 10 mA
Temperature control to
operating temperature 18 – 20 °C 18 – 20 °C
The measuring cell consists of the electrode space, which takes the electrolyte solu-
tion, and the stirrer block arranged in the module. At the floor of the electrode space is
the generator anode in the form of a stable silver plate. The magnetic stirrer runs
above the anode.
The cell is sealed airtight with a cover and three knurled head screws. The two cover
penetrations (holes) are used to mount the combined electrode and a suction olive.
Measuring cell design