Bio-Rad ChromLab™ Software User Manual
Page 98
3
| Preparing the Instrument
96
| NGC Chromatography Systems and ChromLab Software
Inserting Check Valves into the Sample Inject Valve
All NGC systems ship with two check valves in ports W1 and W2 on the sample
inject valve. In addition, the sample pump ships with two extra check valves. The
check valves apply positive backpressure to the waste ports on the sample inject
valve and ensure against any leaks. Each check valve has an arrow to indicate the
direction of flow.
Note:
Ensure that no run is in progress and that the system is off before
inserting the check valves.
To insert the check valves into the sample inject valve
1.
In the sample pump module, locate and open the package containing two
check valves.
2.
If inserted, remove tubing from the W1 and W2 ports on the sample inject valve.
3.
Insert one check valve into W1 and the other check valve into W2. Ensure that
the arrows on each check valve point in the direction of flow (outward, away
from the system).