Metrohm 892 Professional Rancimat - Manual (Page 24)

3.2 Mounting accessories
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16 ￭￭￭￭￭￭￭￭
892 Professional Rancimat
17 PTFE cannula (6.1819.080)
For supplying the air to the measuring solu-
tion.
18 Electrode
19 Protection ring 20 Measuring vessel (6.1428.107)
Proceed as follows to mount the measuring vessel and the reaction vessel:
1 Mounting the measuring vessel cover
￭ Screw the PTFE cannula from above into the In opening of the
measuring vessel cover.
￭ Screw the M8/olive tubing adapter into the In opening of the
measuring vessel cover.
￭ Pour 50 - 80 mL of deionized water into the measuring vessel (the
exact quantity depends on the application).
￭ Place the measuring vessel cover onto the measuring vessel.
2 Mounting the reaction vessel cover
￭ Place the O-ring (6.1454.040) over the upper end of the air tube.
￭ Feed the air tube (6.2418.xx0) into the connector of the reaction
vessel cover (6.2753.107) from above.
￭ Gently screw the M8/M6 thread adapter into the connector while
pressing the air tube against the thread adapter from below. Then
fix the air tube onto the reaction vessel cover by firmly tightening
the thread adapter.
￭ Optional: If determinations are being carried out with highly
foaming samples, clamp the foam barrier (6.1451.010) onto the
air tube.
￭ Blow out the reaction vessel with nitrogen to free it from foreign
substances (e.g. dust or cardboard shreds).
￭ Before putting the cover in place, briefly rotate the upper part of
the reaction vessel in your hand. This slightly lubricates the glass
and facilitates removal of the covers after the measurement.
￭ Place the reaction vessel cover on the reaction vessel.
NOTE
When mounted without foam barrier, the air tube must be in a vertical
position in the reaction vessel.