I was just wondering what temp everyone's projector enclosure has after running for a while. Also indicate the number of fans you used and the position they are in.

Thanks!

I still havent found a good temp meter.

this site http://www.frozencpu.com/scan/se=Thermal/s...enu_search.html has a variety of sensors usefull if youre running anything off 12v.

There's also stuff like this: http://www.lumenlab.com/forums/index.php?s...st&p=138655

I bought one and it's quite cool. Pun intended.

Nice because you can constantly monitor temps in four areas. If a fan fails or an airway plugs up you can get a warning.

I was thinking that I would get someone to make one of those floating
glass thermometer things with specific temperatures and have a switch
on the top, so if it reaches a certain temp it will sound a gong.

...

Just kidding... I think for my new projector I'm going to get one like
that, since I will be sad if things I actually pay money for die.

Make me an offer:

Click to view attachment

Just ran my projector for 1hr with a regular thermometer near the LCD. I got a reading of 36 degrees celcius. Good? Bad or Ugly? lol

8-10º above ambient after 4 hours operation.

Two 120mm fans mounted top rear, pointed upward at a 45º angle. Each fan is rated at 79cfm. Fresh air is pulled from the bottom of the projector - and intake is about 12-14 inches from the floor.

That's running below 100°F (96.8°F actually) which is - if I recall correctly - the benchmark temperature to NOT go above.

Excellent! Now I just need a 12v adaptor for my fan instead of 9v

Room temp +/- 5 degrees. No matter how long it runs...

You know... why am I not surprised that you would have one. Hell,
if I stuck it outside with my setup here in Florida, the gong would just go
continuously.

Wow! Your projector actually sometimes runs 5 degrees below ambient?

If your fan cools sufficiently @ 9V leave it as such. It'll be quieter.

I can't believe I forgot that possibility - I will leave it at 9v

125 F - RUNNING FOR 12 HOURS SENSOR IS AT THE FRONT OF THE LCD

OUCH! No damage to the panel? What is the operating range in the original donor monitor's manual?

Ouch.

For measuring temps, many people have usd a meat thermometer. It has an adequate measurement range.

I had one of those multifunction temperature monitors designed for PC cases. It measured temperature at the LCD top, and bottom. Since that projector had an embedded PC in the case, I also measured the HDD temp and the CPU temp, just because I could.

80 ambient
86 in projector
200 cfm of fan power
-sensor at bottom of lcd where the hot air wraps around lcd

-with just a 90cfm fan 90 degrees with 80 ambient

could someone with the LL65k T15 bulb give me a temp reading on metal flashing very close to the arc? whatever the closest metal is.. temp + distance. I would appreciate it. trying to find out if a magnet in direct contact to a piece of flashing 250mm directly below the bulb (vertically mounted) would see in excess of 300* F or even close to it. thanks

While not exactly what you are asking for, I think this will help you...
I did some temp measurments with my bulb (575 HMI) while it was running with a desk fan blowing directly on it (blowing slightly downward). About 1 inch above the bulb was ~170º C, about 1 inch below the bulb was ~70º C. As you can see, a drop of aproximately 2 inches reduced the temp 100º C. I would imagine 10 inches would bring the temp down quite a bit, I would be very surprised if it got over 100º F, much less 300!

thanks. were these temps in the air or did you possibly press the thermometer against a piece of metal flashing? I wouldn't expect the air to reach close to 300*, but some metal close to the bulb in direct path of heat I imagine could get very hot.

The one above the bulb was my temp probe hanging in mid air...! The one below could possibly have been touching the MDF that my temporary bulb setup is attached to.
[edit]Oh, keep in mind that my bulb is a smaller diameter than most used here. With the temp probe 1" above the glass of the bulb it would be ~1-7/16" away from the arc[/edit]

Here's a pic I took around the same time, if it helps at all...

Oh, you can actually see the white wire for the thermometer probe.

The metal casing around my lamp gets REALLY hot. The IR thermometer that I have just reads "E" when I try to measure the spot near the lamp (from the side away from the lamp.) EDIT: But it's only supposed to measure up to 220 F.

ok thanks for the info guys.

The magnets will be in direct contact with the 7"x6" perforated steel (I guess its steel) plate shown in the pic below. This plate will be 6 or so inches from the ARC, centered below the mogul (bulb in vertical setup, attached to plate via 2 bolts w/ nuts). Its not the most attractive metal, but with 4 or so NdFed magnets, it sure as hell isn't going anywhere when its bumped. The problem is, the magnetic properties of N40 grade NdFeb magnets (pretty much what everyone sells on ebay) degrades rapidly at 130*C, or 266*F, so I'd obviously like to keep them well below this threshold.

I figure if I sheild the magnets with another intermediary plate between them and the mogul to block direct light and heat, the temp should remain around ambient temp of the bulb chamber, which should be well below 266*F. Thoughts?

plate



pic of idea w/ intermediate plate