Hello. Agilent 1260 with G7111A pump user here.
When using a mobile phase reservoir blanketed with helium (6 PSI overpressure on mobile phase bottle), the pump won't pump solvent. Just stays at 0 bar. If I remove the helium pressure, the pump immediately works as normal.
I've used this exact setup on an old system without issue, so I don't understand why this is happening. Anyone got an idea?
Thanks in advance for any help!