Waters ACQUITY UPLC M-Class - Page 34

was prior to tightening. The second edge of the safe tightening zone is the 90-degree
maximum tightening point.
Safe tightening zone positions
45°
90°
Edge of slot in knob
First edge of safe tightening zone
Second edge of safe tightening zone
2.6.1.3.1 Testing the port with the port gauge
To help ensure leak-free connections, you can test the port's acceptability before installing a
ZenFit fitting into a port in a valve, tee, column, or union.
To test a port:
1. Install the port-testing gauge in the port by screwing it in clockwise.
Figure 2–3: Placing the ZenFit port-testing gauge in a port
Port-testing gauge
2. Observe the end of the gauge's handle.
November 26, 2019, 715003588 Revision C
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