16 7820A GC Installation Manual
7820A GC Installation Guide
5 Check for external leaks.
a Maintain pressure for 5 minutes.
b Turn off gas supplies.
c Wait 10 minutes.
d The pressure in the supply lines should remain
constant. If not, check for and fix any leaks.
e Restore supply pressures when leak-free.
See Figure 7 for typical external leak points.
Figure 7 Example external leak points