No means to test further. We are surplus equipment dealers and do not have the ability or knowledge to test equipment for functionality beyond plugging it in and describing what we observe as best we can. We have no knowledge of the history of the equipment. Due to the nature of used and surplus equipment no guarantees or warranties either expressed or implied are offered unless specifically noted in the description.No exceptions unless offered in the description. No manuals, NO STANDARD POWER CORDS, even if it appears in the photo, accessories, software etc are included unless pictured and noted in the description. Listing and template services provided by inkFrog. The item "VARIAN MEMBRANE 949-9411 /DIAPHRAGM VACUUM PUMP" is in sale since Friday, November 2, 2018. This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Vacuum Pumps\Diaphragm Pumps". The seller is "solanotraders" and is located in Bosque Farms, New Mexico. This item can be shipped worldwide.