3 connecting the peristaltic pump, Connecting the peristaltic pump, Figure 6 – Metrohm 772 Pump Unit User Manual
Page 18: Screwing the union nuts tightly
3.3 Connecting the peristaltic pump
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772 Pump Unit
Note
To fasten PTFE tubings in place, you have to widen their openings
(e.g. using a Phillips screwdriver). You can use a piece of sandpa-
per to make the PTFE tubing easier to handle.
Do not heat the tubing ends to widen them, as otherwise the con-
necting nipples can be damaged.
3 Screw the union nuts tightly to ensure a secure tubing connection.
Figure 6
Screwing the union nuts tightly
3.3
Connecting the peristaltic pump
Warning
Follow the instructions listed below for connecting to a control device.
The instrument can be damaged if operated with the wrong supply
voltage.
Voltage
The 772 Pump Unit needs 16 - 24 V DC voltage. It can be connected
directly to Sample Processor models 814, 815, 855 or 864.
When using the 772 Pump Unit in an automation system with remote
control, we recommend using a 731 Relay Box for the power supply.