Mettler Toledo GA42 Operations Instructions download pdf (Page 8)

6 METTLER TOLEDO DL36

Putting into operation

4. Putting into operation

4.1 Preparing the titration cell

Never inhale the vapors of Karl Fischer reagents and avoid skin contact!

The reagents could hazard your health.

– Remove the Teflon stopper of the titration cell and carefully slip the magnetic stirrer into

the cell; replace the stopper.

– Place the titration cell in the holder.

When the DL36 is delivered, the glass joints for the double-pin platinum electrode, inner

burette and Teflon stopper have a very thin coating of silicon grease to assure tightness.

– Remove the Teflon stopper and add anolyte up to the lower mark on the titration cell

(100 mL) using the funnel.

– Remove the silicon stopper from the inner burette and add 5 mL catholyte to the cathode of

the inner burette; its level should be just below that of the anolyte.

– Check that the glass joint is greased, then insert the drying tube.

– Plug the cables of the electrode and the inner burette into the appropriate inputs at the rear

of the DL36 (see illustration on next page).

WARNING

Glass stopper with inner burette

and silicon stopper/drying tube

Drying tube

Titration cell

Detection electrode (double-

pin platinum electrode)

Keypad

Holder of titration cell

Display

Teflon stopper with septum

(injection port)

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Mettler Toledo GA42 Operations Instructions Page 8