Hello, I have had this problem in numerous configurations for years, but decided today was a good day to ask the experts.
I have a d/p flow meter that is a CAS slave (0-15 MSCFH). The CAS master is an analyzer that runs above setpoint 99% of the time calling for a 0 MSCFH output. What happens is the turndown on the d/p allows me to read/control to ~ .25 MSCFH, but then drops to zero. So my tuning set says "hey we are good at setpoint" and the vent valve position stays open ~.75 to 2.5% when I really want it to be on the seat completely closed. I know I could enable track & drive the output to zero if the flow is below .25 MSCFH, but then I would be in IMAN/LO. Just looking for expertise, suggestions or recommendations. Thanks!
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