Agilent Technologies 7890A Troubleshooting Manual page 88

7
Checking for Leaks
88
Fully turn the regulator knob counterclockwise to shut
3
the valve.
4 Wait 5 min. If there is a measurable drop in pressure,
there is a leak in the external connections. No drop in
pressure indicates that the external connections are not
leaking.
Troubleshooting