Micromeritics ASAP 2020 Confirm Operator's Manual page 404

ASAP 2020 Confirm
Valves 1, 2, and PV
18. Open valves 1 and 2.
19. Open valves 4, 5, and PS.
20. Allow the system to evacuate for 15 minutes.
21. Close valves 1 and 2. Valve PV should be closed; if not, close it.
22. Take a pressure reading; record it as P1 for valves 1, 2, and PV.
23. Wait 10 minutes and take another pressure reading; record it as P2 for valves 1, 2, and PV.
24. Subtract P1 from P2 and divide the difference by 10; record this value as the outgassing
rate for valves 1, 2, and PV. This value should be less than 0.7 mHg/min.
25. Fill the manifold to 800 mmHg with N
26. Close valve 4.
27. Take a pressure reading; record it as P1 for valve PV.
28. Wait 10 minutes and take another pressure reading; record it as P2 for valve PV.
29. Subtract P1 from P2 and divide the difference by 10; record this value as the outgassing
rate for valve PV. This value should be less than 50 mHg/min.
If the pressure drops more than 0.05 mmHg, close valve 5, the PV valve may be leaking.
30. Take another pressure reading; record it as P1 for valves 1 and 2.
31. Wait 10 minutes and take another pressure reading; record it as P2 for valves 1 and 2.
32. Subtract P1 from P2 and divide the difference by 10; record this value as the outgassing
rate for valves 1 and 2. This value should be less than 50 mHg/min.
If the pressure drops more than 0.05 mmHg, close valve 7, valves 1 or 2 may be leaking.
33. Take another pressure reading; record it as P1 for valve 1.
34. Wait 10 minutes and take another pressure reading; record it as P2 for valve 1.
35. Subtract P1 from P2 and divide the difference by 10; record this value as the outgassing
rate for valve 1. This value should be less than 50 mHg/min.
If the pressure drops more than 0.05 mmHg, valve 1 may be leaking.
D-6
, then close the nitrogen port valve.
2
Appendix D
202-42811-01 - Mar 2011