you guys that run flow benches, what are the standaridzed base settings?
press and or vacuum?
what scale ?inches of mercury or water?
what min cfm and max cfm @ so many inches?
what manometers do you use Dwyer?
do any have magnahelic needel gauges?
im building one for home.
got most of the parts but dont know which are like the standard ones commercially available.
what size blower you run and at what back press?
thanks

Go to this website: flowbenchtech.com and link over to the flow bench forum. You will find some very good info on building your own flow bench. I have both a name brand flow bench and a homemade one with electronics and don't let anyone ever tell you can't build one as accurate as store bought. my homemade bench is 3 times faster and more user friendly than my name brand.

28" of H2o is standard test depression.

Mine has a Dwyer 36" vertical manometer for test
depression and an extra 36" for pitot probes.
It has a Dwyer 6" incline manometer for taking
readings. You'll need more than one blower. (Mine
has eight) I haven't a clue what a magnahelic
needel gauge is though.

Try here for more information....... PTS Flowbench

Magnehelic differential pressure gauges

http://www.dwyer-inst.com/Products/TOC.cfm?MainCategory_ID=1&iCurrentCategoryID=289

IF you want dead accurate readings, these are it. We use their elements, and they can be heart breakers sometimes, but your readings will be correct, and repeatable.

http://www.meriam.com/main.asp?m=3&d=62

tell me more bout test conditions and needed blower volume and press.
is the stated port cfm always at 8 in h2o back press?
mr340 is yours al gauge and not manometers?
what scale ranges?