We’re running a 5-minute cycle on a Rosemount 370XA for residue gas and considering a 2-minute method to tighten BTU swings feeding two 12-in turbine meters. Anyone push faster cycles without losing repeatability — what oven temp and backflush timing worked for you, and did it help your flow computer balance?
We run a 370XA at about 3.0 min on residue by holding the oven at 80°C, bumping H2 carrier about 20%, and triggering backflush about 8–10 s after n‑C5 (event‑based, not fixed)… At 2.0–2.2 min our C6+ repeatability loosened and BTU noise hit the flow computer, so a 5‑sample EMA steadied the turbine balance — felt like pulling espresso. What carrier are you on, and is your backflush tied to “after n‑C5” or a fixed time?
On a 370XA residue stream trying to beat a 5‑minute cycle, we hit about 2.3 minutes by swapping to a [redacted] loop and holding the oven around 88°C. If you’re set on a ‘2-minute method’, @OP, are you comfortable with the smaller loop’s slight sensitivity hit? It tightened BTU swings feeding two 12‑in turbines, but we did bump the flow computer averaging to about 10 s for stability.