Replacing Valves On The Degas And Gas Inlet Manifold - Micromeritics ASAP 2020 Confirm Operator's Manual

ASAP 2020 Confirm

Replacing Valves on the Degas and Gas Inlet Manifold

1. Backfill the manifold with nitrogen to approximately 800 mmHg.
2. Turn off the gas supply for the inlet valves.
3. Turn off the vacuum pump system for degas valves D5 and D6.
4. Carefully remove the wires to the valve coil.
5. Unscrew and remove the valve from the manifold.
6. Install the new valve, then reconnect the wiring.
7. Turn on the gas supply and vacuum pump system.
8. Evacuate the analyzer until the outgas rate is less than 0.7 mHg/min. for inlet valves;
10 mHg/min. for degas valves. Refer to
instructions.
D-10
Testing Individual Valves
Appendix D
for detailed
, page D-1
202-42811-01 - Mar 2011