View Single Post
Unread 03-12-2006, 12:41 PM   #83
bigben2k
Responsible for 2%
of all the posts here.
 
bigben2k's Avatar
 
Join Date: May 2002
Location: Texas, U.S.A.
Posts: 8,302
Default Re: Wind Tunnel Construction

I received the replacement blower motor last week. Friday, I installed it, and was able to take it through a quick test run. It works well. It's quieter than I expected, similar to a household vacuum cleaner; very tolerable.

I picked up another manometer:
Meriam Instruments 40GD10
link
($0.99 + $17.81 shipping & handling)
I hope to get more precise readings from it, until I go digital.

I also got a set of four SSR (Solid State Relays), model D1D20:
($30.01 + $8.49 S&H)
Specifications
(PDF, 2 pages, 48 kb)
I'll be using these along with my Harrison PSU (0-36Vdc, 0-5A) to heat up some nichrome wires, in that test run with the Fuji temperature controller.

Still working on the tunnel tubing. A pair of 55 gallon drums is starting to look attractive.

Money is becoming tight, and I'm going to have to cool off the acquisitions for a while.


Saturday, I was able to test some of my other testbench instruments: the three RTD temperature transmitters, the industrial RTD probe, the whole lot of small PSUs (5v, 12v, 15v, and 24v, DC).
(see list here)

Picked up a pair of lithium batteries for my Sponsler flowmeter ($17 with shipping). The meter won't power up without them.

I will be picking up a set of thermocouples, and two Fluke 2190A from Bill (graciously calibrated!).

Am going to have to pickup:
.826 specific gravity, red oil for both manometers (can probably get locally).

250 ohm precision resistors for the RTD transmitters (the 4-20 mA output is through the power connection, (!) ).

Last edited by bigben2k; 03-12-2006 at 01:01 PM.
bigben2k is offline   Reply With Quote