Metrohm 873 Biodiesel Rancimat Manual - Manual (Page 21)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 3 Installation
873 Biodiesel Rancimat ￭￭￭￭￭￭￭￭ 13
3.2.2 Mounting accessories for the external air supply
If the laboratory air is heavily contaminated, an external gas supply with
synthetic air can be provided. For this, the corresponding accessories must
be mounted on the rear of the Biodiesel Rancimat.
Mount the accessories for the external air supply as follows:
1 Mount the FEP tubing
￭ Screw the one end of the FEP tubing 130 mm (4- 11 ) onto the Air/
N
2
in connection (4- 12 ) on the rear of the Biodiesel Rancimat.
￭ Screw the tubing adapter M6 / olive (6.1808.020) onto the other
end of the FEP tubing.
2 Connect the gas supply
￭ Mount the gas supply from the bomb with synthetic air onto the
tubing adapter M6 / olive (6.1808.020).
Note
With an external gas supply, the gas flow cannot be regulated in the PC
program. The gas flow must be set manually using the reducing valve and
the gas flow display (see Chapter 4.2.4, page 39).
3.2.3 Equipping the reaction and measuring vessels
The following figure shows in detail, how the accessories parts for measuring
the oxidation stability have to be mounted and connected to one another.