So the rough pump is cutting out after about 30 minutes. I spoke with the manufacturer, and two likely causes.
- The rough pump is set to 240V (it will run, but will eventually cutoff from overheating)
- The diaphram in the rough pump is worn out, causing overheating.
My guess is #2. Investigating.
Here are the rough pumps identifiers:
Mod: MVP-035 2001/01
Mod. – Nr. PKT01200
Lab note: The chamber holds ~150 Liters (0.15 Cubic Meters or 5.2 Cubic Feet). The pumps works at 40 l/s, so it would take 3 secs to rough the chamber? Does that sound right?