70
3
Working with the TO 780 and the TW 7650
General
3.1
3.1.1
The vials and the crimping tool
The measurements using a headspace oven are carried out in so-called sample vials. The vials have a capacity
of 5 ml (Fig. 35). The samples to be measured are weighed directly into the vial and sealed with an ND 20
aluminum cap (Fig. 36). In the case of liquids such as oil samples, it must be ensured that the filling level in the
vial is sufficient for the needle of the needle head to protrude into the sample and the gas flow can thus pass
through the sample.
The crimping tool (Fig. 37) included in the scope of delivery is used for manual closing of the vials.
Fig. 35
Fig. 36
Fig. 37
For closing, the cap is placed on the vial (Fig. 38) and closed by means of the forceps jaws (Fig. 39) by
squeezing the forceps handles (Fig. 40).
Fig. 38
