|
|
Buly,
I asked because IR can be tricky when it comes to measuring metals (especially aluminum.) The emissivity value of most metals is quite low and an accurate reading is based on a accurate emisivity value. It is possible the temp reading on the 1.5" aluminum tube was lower than actual due to improper emisivity setting. Another misconception I have seen with IR measurement is with guns that have a laser locator spot. May users this the laser spot is the spot being measured, actually it is the center of the measurement area which can be larger than the 1.5" diameter depending upon the D:S ratio of the meter and the measurement distance. I am not an EE, so no need to puke, more of a controls, automation, and instrumentation engineer.
----- Original Message ----- From: "Bulent Aliev" <atlasyts@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, August 09, 2006 9:47 PM
Subject: [FlyRotary] Re: water temp location
The gun belongs to my hangar neighbor. He is an electronics engineer (another one. i'm gona puke :)). First he calibrated the gun. Than he pointed it to the area closest to the temp sensor by the oil pressure sensor. The temp reading was same as the EM2 water temp reading. Than he moved to the pump outlet, thin wall 1.5" aluminum tube. the reading was lower.
I could not believe it so we did it again. Same results.
Bulent "Buly" Aliev
FXE Ft lauderdale, FL
http://tinyurl.com/s5xw8
On Aug 9, 2006, at 7:53 PM, Joe Ewen wrote:
Buly,
What kind of hand held unit did you use? IR?
Joe
----- Original Message ----- From: "Bulent Aliev" <atlasyts@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, August 09, 2006 2:32 PM
Subject: [FlyRotary] Re: water temp location
I did it with one of the handheld temp meters. Surprisingly the water exiting the pump was about 5-10 degree lower temp? Did it couple different ways and the results were similar.
Buly
Group,
Has anyone measured the water temp difference between the stock (under the oil filter tower) and the water pump outlet. Bill Eslick and I were discussing this a couple of weeks ago. I am measuring water temp going out of the engine, post water pump outlet. Just curious!
Thanks,
Jason
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
|
|