Metrohm 807 Dosing Unit - Manual (Page 17)

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2 Construction of the 807 Dosing Unit
807 Dosing Unit
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2.4 Connectors (ports) of the 807 Dosing Unit
1
3
4
5
2
Figure 4 807 Dosing Unit - Ports
1 Port 1
Connector (M6) for the dosing tubing. 2 VENT
Deaeration, connection (M6) for adsorber
tube.
3 Port 4
Special port, waste port or recycling port. 4 Port 3
Connector (M6) for a second dosing tubing.
5 Port 2
Connector (M6) for the filling tubing.
WARNING
Port 2 is the fill port in the default configuration. Take care to ensure
that the tubing is firmly screwed in place in order that no air bubbles
will be able to enter during aspiration of the reagent solution. Always
use the 6.2739.000 wrench provided for tightening and unscrewing
tubing connections.