Operation
66 Edition 01/2016 multi EA 4000
1 connection for combination electrode
2 connection between measuring gas and com-
bination electrode
3 olive with connection extraction hose
4 measuring cell connection
5 adsorption tube, filled with active carbon
5. Insert the combination electrode and
the hose olive with extraction hose into
the openings provided in the measuring
cell lid
6. Connect the combination electrode and
the measuring cell at the connections at
the backplate of the Cl module.
7. Slide the measuring hose (colorless)
approx. 1 cm wide onto the end of the
combination electrode.
8. Switch on the multi EA 4000 and its device components (see section "Performing the
Cl measurement" p. 67).
9. Perform an end point routine (see section "End point routine" p. 66).
Once the end point routine is completed, the system is ready for measure-
ments.
10. If necessary, check the cell using a direct method.
7.4.4 End point routine
An end point routine is required after each electrolyte change.
The operating point of the coulometric measuring cell is in the range of 1500 – 5000 counts.
1. Start the end point routine manually via the menu item S
YSTEM / END POINT ROUTINE.
2. Pull the olive with the extraction hose out of the measuring cell lid. After the prompt
meter the HCl solution directly into the measuring cell:
− "sensitive" cell 100 µl of a 0.01N HCl solution
− "high concentration" cell 100 µl of a 0.1N HCl solution
3. Immediately after metering start the end point routine by clicking on [OK].
In the S
TATUS ANALYZER window the status END POINT ROUTINE is shown during the
process. After the end point routine the window S
TATUS ANALYZER shows the status
S
TAND-BY TITRATION and the current indicator value.
The system is ready for measurements.
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