multi EA 5000
Chlorine analysis with the Cl module
63
The "high sensitive" measuring cell is inserted into the detection module as follows:
NOTICE
Risk of damage to the sensor electrode
The sensor pin and the gold contact of the sensor electrodes are sensitive to touch.
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Apply scratch protection to the sensor pin for storage.
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Rinse the sensor pin with ultrapure water before use or to clean it. Do not touch it
again after this. Do not dry the pin or wipe it dry!
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Before use or to clean it, wipe the gold contact with a cloth and some ethanol. Do
not touch it again after this.
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Insert the measuring cell with magnetic stirring rod and lid into the de-
tection module.
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Fill the measuring cell with electrolyte solution. Fill the storage container
with approximately 2 to 3 ml of internal electrolyte.
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Insert the components in the following openings:
Sensor electrode with pre-amplifier (1): "Sen" opening
Silver electrode (2): "Ag" opening
Platinum electrode with salt bridge (3): "Pt" opening
Gas inlet tube (4): "Gas" opening
Adapter (5): center opening (unmarked)
Seal the opening for direct injection (6) with a plug
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Connect the short hose with the T piece to the adapter (5). Connect the
exhaust hose in the detection module (hose 21) with a limb of the T
piece.
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Connect hose 20 from the sulfuric acid container to the gas inlet tube via
the PTFE connector.
NOTICE! The conical nipples of the PTFE connector must be in the
proper position on the hose. Otherwise, gas leaks may ensue.
1
2
3
4
5
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Connect the electrode on the inside of the rear panel of the detection
module:
Platinum electrode connection (3)
Silver electrode connection (4)
Sensor electrode connection (5)
Do not use connections (1) and (2)
