can draft be checked beyond baro?

Can the draft be checked by drilling a hole for manometer after the baro and before it gets to the chimney. My set up did not have room for any pipe before installing the tee for baro. I had to install tee directly in furnace and then an elbow the baro is installed in the tee close to the furnace.
I drilled a hole in the elbow right after the baro and check the draft this morning with outside temps @ 30 degrees and had a draft of 1.5. I readjusted the baro to get it down to .8 and am going to try to keep fire going today.
Does it mater where you check the draft before or after baro? Furnace is a hand fired unit.

Gotta check the draft between the baro and the coal burner, between the baro and the chimney will only give the draft in the chimney, not the actual draft to the appliance.

manometer install

Thanks for quick reply I went and removed one of the screws out of the collar where the tee hooks up and took a reading there and readjusted baro to .08
The tube I have on my manometer will go in the zip screw holes makes it handy as I dont need to make any additional holes.
We will see if the new setting makes it a little easier to control and maybe let me throttle it back more and still not loose the fire.
Supposed to be in the mid 30's tonight so I want to try to keep it going.

you can use a digital monometer with three digit after the decimail point.
BDD

-.08" WC may be too much, how hot does the pipe get? I'd try it at -.06". You have to get it to the best setting where the burn doesn't get lazy (low draft) vs. too hot (high draft) and all the nice heat is going up the chimney. Too much draft will also give you shorter burn times.

Don't forget you need to take the reading and adjust the baro with a full vigorous fire burning and a nice warm chimney.

The hotter the gases going into the flue the more the chimney will draft, so setting it up with a full fire will insure the baro stays closed with a low fire, unless it's responding to the Venturi effect on a windy day. Also a chimney cap will help to cut back on the winds effect on the draft.

http://en.wikipedia.org/wiki/Venturi_effect

should this be done with ash pan door open or just the draft spun out all the way?

Ash door closed and the air vent set where you normally have it for a high burn.