Sample Tube O-Ring Replacement - Micromeritics GEMINI VII Operator's Manual

S T O-
AMPLE UBE
The equipment images in this topic may differ slightly from your equipment; however,
the instructions are the same unless otherwise noted.
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.
Before removing (or installing) a sample tube, ensure that the port valve is closed.
Observe the analyzer schematic to verify valve status.
Do not allow the sample tube connector nut drop onto the bottom of the tube as it may
break the tube.
Use the proper size frit for the sample port. The analyzer will not operate properly if an
incorrect size is used.
1. Carefully remove the Dewar from the analyzer. Take care not to bump the sample tube
bulbs with the Dewar during this process. Place the Dewar aside.
2. Hold the sample tube firmly with one hand, loosen the sample tube connector nut by turning
counter-clockwise.
3. Carefully pull the sample tube down until it is free from the port. It may be necessary to
grasp the sample tube with both hands.
4. 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, use the O-ring removal tool from the
accessory kit [tool part number 004-54618-00] or use a pair of tweezers or needle-
nose pliers to remove it.
Gemini VII Operator Manual
239-42828-01 (Rev H ) — May 2021
R
RING EPLACEMENT
A. Sample tube or balance tube
B. Connector nut
C. O-ring
D. Ferrule

Sample Tube O-ring Replacement

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