Metrohm 774 Oven Sample Processor - Manual (Page 13)

1.3 Instrument description
774 Oven Sample Processor, Instructions for use 7
When the sample rack is positioned the rod magnets on the base of the
rack are read in automatically. The arrangement of the magnets defines the
rack code, which is allocated to an internal position table with whose help
the 774 Oven Sample Processor recognizes the arrangement of the vial po-
sitions on the rack.
The above arrangement corresponds to the magnet code 000001.
1.3.7 Sample vials
The sample rack (order no. 6.2041.700) is intended for use with sample vi-
als (order. no. 6.2419.000) with 21 mm outer diameter. Only these vials
guarantee optimal heat transfer between the oven block and the sample.
Use only septum seals with a PTFE insert (order. no. 6.1448.050), as these
are exposed to high temperatures. The sample vials must be tightly sealed
by using the septum closure crimpers.
Closures which are not sufficiently tight can cause significant errors in the
results. Closures which are not mounted properly may cause damage to
the injection needle.