Replacing The Sample Tube O-Ring - Micromeritics ASAP 2020 Confirm Operator's Manual

ASAP 2020 Confirm

Replacing the Sample Tube O-ring

It is important to maintain a vacuum-tight seal near the top of the sample tube stem. If an O-
ring becomes worn or cracked, it does not provide a good seal and will need to be replaced.
This procedure applies to both degas and analysis ports.
Before removing (or installing) a sample tube, ensure that the port valve is closed.
To replace the O-ring:
1. Holding the sample tube firmly with one hand, loosen the sample tube connector nut by
turning counterclockwise.
Be careful not to let the sample tube connector nut drop onto the bottom of the
tube as it may break the tube.
2. Carefully pull the sample tube down until it is free from the port. You may have to grasp
the sample tube with both hands.
3. Remove the O-ring from the top of the sample tube and replace it with a new one.
If the O-ring remains inside the sample port, you may use a pair of tweezers or
needle-nose pliers to remove it.
8-6
Sample Connector
O-ring
Ferrule
Sample Tube
Connector Nut
Sample Tube
Preventive Maintenance
202-42811-01 - Mar 2011