Troubleshooting proportional valves at 7890B GC EPC modules

Hello Agilent,

The actual total flow at my split/spitless inlet on my 7890B GC is not stable, varies 1-3 mL quickly up and down, causing total flow shut down in the end. How do I check-out if a proportional valve at the 7890 GC EPC module are malfunctioning? Can I check the electrical resistance over the valve leads? 

With kind regards -

Lars, Copenhagen

Was this helpful?