Knauer 4000 MiD, Инструкция по эксплуатации

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45 Calibration
4000 MiD® Instructions, V6695
22. If excessive force is required stop immediately and repeat steps 18-
21.
23.
Fit the DFI/SFI (Installing spraychip assemblies).
24.
Close the door.
9.8 Cleaning the vac-chip
The following procedure is the recommended cleaning procedure for
your vac-chip.
1.
Remove the vac-chip as described in the Removing and replacing
the vac-chip.
2. Prepare a small ultrasonic bath in a fume hood/suitable extracted
area. Fill the bath with room temperature water.
3.
Prepare a clean test-tube (20mm OD). This tube dimension ensures
that when you place the vac-chip inside, the face of the vac-chip will
not touch any surfaces.
Warning To avoid damaging the vac-chip do not use different
sized test-tubes or other glassware for cleaning.
Avertissement Pour éviter d’endommager le vac-chip, ne pas
utiliser des tubes à essai de tailles différentes ou autres objets en
verre pour le nettoyage .
4. Tilt the test tube close to horizontal and carefully place the vac-chip
just inside in the mouth of the tube.
5. Slowly turn the test tube until vertical allowing the vac-chip to slide
slowly to the bottom of the tube.
6. Pour enough HPLC grade water into the test-tube to cover the vac-
chip.
7. Place the test tube in a suitable rack in the ultrasonic bath and soni-
cate for 10 minutes.
Warning
Do not heat the ultrasonic bath as this can damage the
vac-chip.
Avertissement
Ne pas chauffer le bain à ultrasons car cela peut
endommager le vac-chip.
8. Remove the test tube from the bath and carefully pour most of the
water away without removing the vac-chip.
9. Refill the tube with HPLC grade acetonitrile such that the vac-chip is
submerged as before and sonicate for 10 minutes.
10. Repeat steps 7-8 using HPLC grade methanol.
11. Carefully pour off the methanol and then gently tip the vac-chip out
into a shallow petri dish or on to lint free tissue such that the vac-chip
can be easily picked up with tweezers.
12. Using flat tweezers carefully hold the vac-chip by pinching either side
of the larger metal ring (Fig. 61).
13. Gently blow dry the vac-chip with compressed air/nitrogen. Remove
as much excess liquid as possible.
14. Place the vac-chip in an oven at 75
°
C for 30 min to completely dry it.
Procedure