Micromeritics ACCUPYC III Operator's Manual page 92

3 Maintenance and Troubleshooting
Connect a Gas Cylinder
1. Use an appropriate cylinder wrench to remove the protective cap from the replacement gas
cylinder.
2. Place the protective cap in a secure location. It will be needed to recap the gas cylinder
when it is depleted and replaced.
3. Attach the gas regulator to the gas cylinder connector. Hand tighten the nut, then use an
appropriate wrench to tighten an additional 3/4 turn.
Over-tightening the fitting may cause a leak.
4. Check for leaks at the high pressure side of the regulator and in the connector.
a. Turn the regulator control knob fully counter-clockwise.
b. Slowly open the gas cylinder shut-off valve, then quickly close it.
c. Observe the pressure on the high pressure gauge for approximately one minute.
If the pressure is stable, proceed with the next step.
n
If the pressure decreases, tighten the regulator connector nut until it becomes
n
stable. If the pressure does not remain stable, remove the regulator and clean all
contacts at the regulator connection, then reinstall the regulator.
For the following steps, refer to
5. Connect the gas line to the regulator and the instrument and perform a leak test.
6. Set the regulator pressure until the low pressure gauge reads 22 psig (152 kPag).
7. Purge the gas line and confirm that the regulator pressure has not changed.
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Operations on page 2 -
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AccuPyc III Operator Manual