Metrohm 894 Professional CVS User Manual
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3 Installation
894 Professional CVS
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31
Installing the capillary on the tubing connection port of
the measuring head arm
We recommend using PTFE capillaries (e.g. 6.1803.020) between the tub-
ing connection port of the measuring head arm (see Figure 6, page 15)
and the dosing unit and/or peristaltic pump. Proceed as follows:
1 Slide the pressure screw over the capillary. Ensure that the capillary
protrudes 1 to 2 mm from the tip of the pressure screw.
2 Push the capillary into the threaded opening SMP (6-4) of the tubing
connection port of the measuring head arm until it stops.
3 Only then start turning the pressure screw, while holding the capillary
firmly in place.
Connecting a capillary to a dosing unit
To attach the capillary to the dosing unit using a pressure screw, you need
an adapter for the thread on the dosing unit. Proceed as follows:
1 Screw the adapter (6.2744.080) to port 2 of the dosing unit.
2 Slide the pressure screw (e.g. 6.2744.010) over the capillary (e.g.
6.1803.020). Ensure that the capillary protrudes 1 to 2 mm from the
tip of the pressure screw.
3 Push the capillary into the threaded opening of the adapter until it
stops.
4 Only then start turning the pressure screw, while holding the capillary
firmly in place.