PerkinElmer Photovac 2020, Manual

Page: 76 / 190

2020 Software Manual
74
Do not use adapters to connect one CGA fitting to another type
of CGA fitting. If the regulator does not match the outlet on
your calibration tank, contact your specialty gas supplier.
2. Attach the knurled nut on the gas bag adapter to the
regulator. Finger-tighten the fitting.
1/8" to 3/16"
Union
1/8" Nut
Insert Gas
Bag Tube Stub
1/8" Adapter
Tubing
To Regulator
or 2020
Teflon
Ferrules
Front
Back
Figure 12 Gas Bag Adapter
3. Loosen the knurled nut on the reducing union of the gas
bag adapter.
NOTE: Do not remove the nut from the union as the Teflon ferrules
contained inside the nut may be lost. See Figure 12.
4. Insert the tube stub from the gas bag into the knurled
nut. Tighten the knurled nut and ensure the tube stub is
secure. If the gas bag is not secure, ensure you have
inserted the tube stub far enough into the knurled nut.
Do not over-tighten the fitting.
NOTE: Over-tightening the Teflon ferrules will result in damage to the
ferrules!
5. The union should be connected to the gas bag adapter.
If it is not, then tighten the nut on the adapter tube to the
union.
6. Flush and fill the gas bag. See Using the Gas Bag on
page 168 for instructions.
7. Remove the knurled nut on the adapter tube from the
regulator.