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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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FLIR
Looking at FLIR handhelds to do a bunch of tasks including identifying
hot components / traces. I also plan to use it for monitoring room air leaks and wall insulation. 1) are there any features of a particular FLIR model that is advantageous? 2) is there a place to get a better price break? New! One unit. |
#2
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FLIR
Time to spin up the kooks again. Melt, kooks, melt. snicker
BeeJ, in did thusly write: Looking at FLIR handhelds to do a bunch of tasks including identifying hot components / traces. I also plan to use it for monitoring room air leaks and wall insulation. 1) are there any features of a particular FLIR model that is advantageous? 2) is there a place to get a better price break? New! One unit. If you're looking for a homebrew project, take a look at the FLIR in the Neato vacuum cleaner, there's been a lot of people taking that out of the vacuum and using it for other purposes. -- /\ Properly known as Bill \ /\ The Monster You Kooks Can't Handle \ / \ THERE IS NO CABAL - LONG LIVE THE NEW CABAL \/ The AUK coup is complete. The Old Cabal is no more. Kook Awards Official Voting Ballot: Message-ID: http://al.howardknight.net/msgid.cgi?ID=134906097300 https://groups.google.com/group/alt....05de54d25966a4 |
#3
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FLIR
On Tue, 30 Oct 2012 15:00:45 -0700, BeeJ wrote:
Looking at FLIR handhelds to do a bunch of tasks including identifying hot components / traces. I also plan to use it for monitoring room air leaks and wall insulation. FLIR imagers are really cool, but also expensive. If all you want to do is look for leaks, try one of these from Black and Decker: http://www.blackanddecker.com/power-tools/TLD100.aspx I have two of them (the 2nd one bought after I misplaced the first). Point the device at an inside wall to set a reference level. Then, run it along window frames, door joints, wall outlets, etc to check for temperature differences. It has a red/green/blue LED that lights up the test area, indicating whether the test area is hotter, same, or colder than the reference temperature. Unfortunately, it's kinda useless for finding hot spots on PCB's. For that, I use various liquid crystal sheets. Just lay it over the PCB and watch the colors change: http://www.edmundoptics.com/testing-targets/calibration-standards/temperature-sensitive-liquid-crystal-sheets/1642 For identifying the exact component, I use a thermistor probe. 1) are there any features of a particular FLIR model that is advantageous? 2) is there a place to get a better price break? New! One unit. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#4
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FLIR
On 10/30/2012 3:00 PM, BeeJ wrote:
Looking at FLIR handhelds to do a bunch of tasks including identifying hot components / traces. I also plan to use it for monitoring room air leaks and wall insulation. 1) are there any features of a particular FLIR model that is advantageous? 2) is there a place to get a better price break? New! One unit. Do the math. I'm gonna use round numbers, YMMV. If you want to look at a PCB with SMT devices, you may want 1mm resolution. If your IR scanner has 160pixel resolution, that gives you a 16cm field of view. That's close focus and the depth of field will be lousy. Will be useless for scanning a wall for leaks. More likely, affordable scanners will work fine for the wall leaks and be useless on small components. Unless you get an IR scanner with zoom and/or macro focus adjustment... or have a close-up lens made out of Germanium, it'll be hard to make both measurements with one device. People overestimate the temperature measurement capabilities of IR. Emissivity plays a big part when measuring random devices on a PCB. I did some experiments 30 years ago. Turns out that spraying a board with foot powder normalized the readings nicely. Problem was that the foot powder wouldn't wash off. Bummer... |
#5
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FLIR
"mike" wrote in message ... On 10/30/2012 3:00 PM, BeeJ wrote: Looking at FLIR handhelds to do a bunch of tasks including identifying hot components / traces. I also plan to use it for monitoring room air leaks and wall insulation. 1) are there any features of a particular FLIR model that is advantageous? 2) is there a place to get a better price break? New! One unit. Do the math. I'm gonna use round numbers, YMMV. If you want to look at a PCB with SMT devices, you may want 1mm resolution. If your IR scanner has 160pixel resolution, that gives you a 16cm field of view. That's close focus and the depth of field will be lousy. Will be useless for scanning a wall for leaks. More likely, affordable scanners will work fine for the wall leaks and be useless on small components. Unless you get an IR scanner with zoom and/or macro focus adjustment... or have a close-up lens made out of Germanium, it'll be hard to make both measurements with one device. People overestimate the temperature measurement capabilities of IR. Emissivity plays a big part when measuring random devices on a PCB. I did some experiments 30 years ago. Turns out that spraying a board with foot powder normalized the readings nicely. Problem was that the foot powder wouldn't wash off. Bummer... Kapton tape is very good for emissivity. Really works well when placed on a gold plated part. It is very black to long wave IR. |
#6
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FLIR
Jeff Liebermann wrote in message
... On Tue, 30 Oct 2012 15:00:45 -0700, BeeJ wrote: Looking at FLIR handhelds to do a bunch of tasks including identifying hot components / traces. I also plan to use it for monitoring room air leaks and wall insulation. FLIR imagers are really cool, but also expensive. If all you want to do is look for leaks, try one of these from Black and Decker: http://www.blackanddecker.com/power-tools/TLD100.aspx I have two of them (the 2nd one bought after I misplaced the first). Point the device at an inside wall to set a reference level. Then, run it along window frames, door joints, wall outlets, etc to check for temperature differences. It has a red/green/blue LED that lights up the test area, indicating whether the test area is hotter, same, or colder than the reference temperature. Unfortunately, it's kinda useless for finding hot spots on PCB's. For that, I use various liquid crystal sheets. Just lay it over the PCB and watch the colors change: http://www.edmundoptics.com/testing-...ards/temperatu re-sensitive-liquid-crystal-sheets/1642 For identifying the exact component, I use a thermistor probe. 1) are there any features of a particular FLIR model that is advantageous? 2) is there a place to get a better price break? New! One unit. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 Laying around I have some Neil Brown, USA sub-mm fast response thermistors. Next time I'm in that situation I will try one along with non-contact IR thermometer |
#7
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FLIR
On Wednesday, October 31, 2012 10:57:02 AM UTC-7, tm wrote:
"mike" On 10/30/2012 3:00 PM, BeeJ wrote: Looking at FLIR handhelds to do a bunch of tasks including identifying hot components / traces. I also plan to use it for monitoring room air leaks and wall insulation. 1) are there any features of a particular FLIR model that is advantageous? 2) is there a place to get a better price break? New! One unit. Do the math. I'm gonna use round numbers, YMMV. If you want to look at a PCB with SMT devices, you may want 1mm resolution. If your IR scanner has 160pixel resolution, that gives you a 16cm field of view. That's close focus and the depth of field will be lousy. Will be useless for scanning a wall for leaks. More likely, affordable scanners will work fine for the wall leaks and be useless on small components. Unless you get an IR scanner with zoom and/or macro focus adjustment... or have a close-up lens made out of Germanium, it'll be hard to make both measurements with one device. People overestimate the temperature measurement capabilities of IR. Emissivity plays a big part when measuring random devices on a PCB. I did some experiments 30 years ago. Turns out that spraying a board with foot powder normalized the readings nicely. Problem was that the foot powder wouldn't wash off. Bummer... Kapton tape is very good for emissivity. Really works well when placed on a gold plated part. It is very black to long wave IR. Some 20 years ago we found that ordinary black electrical tape [non shiny] gave excellent correlation to measurement with a contact probe on 'bright' metal parts when 'looking' with Fluke IR probe. Cheap and easily removed after testing. Neil S. |
#8
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FLIR
On 11/1/2012 10:32 AM, nesesu wrote:
On Wednesday, October 31, 2012 10:57:02 AM UTC-7, tm wrote: "mike" On 10/30/2012 3:00 PM, BeeJ wrote: Looking at FLIR handhelds to do a bunch of tasks including identifying hot components / traces. I also plan to use it for monitoring room air leaks and wall insulation. 1) are there any features of a particular FLIR model that is advantageous? 2) is there a place to get a better price break? New! One unit. Do the math. I'm gonna use round numbers, YMMV. If you want to look at a PCB with SMT devices, you may want 1mm resolution. If your IR scanner has 160pixel resolution, that gives you a 16cm field of view. That's close focus and the depth of field will be lousy. Will be useless for scanning a wall for leaks. More likely, affordable scanners will work fine for the wall leaks and be useless on small components. Unless you get an IR scanner with zoom and/or macro focus adjustment... or have a close-up lens made out of Germanium, it'll be hard to make both measurements with on e device. People overestimate the temperature measurement capabilities of IR. Emissivity plays a big part when measuring random devices on a PCB. I did some experiments 30 years ago. Turns out that spraying a board with foot powder normalized the readings nicely. Problem was that the foot powder wouldn't wash off. Bummer... Kapton tape is very good for emissivity. Really works well when placed on a gold plated part. It is very black to long wave IR. Some 20 years ago we found that ordinary black electrical tape [non shiny] gave excellent correlation to measurement with a contact probe on 'bright' metal parts when 'looking' with Fluke IR probe. Cheap and easily removed after testing. Neil S. Piece of cake; cut the tape into hundreds of tiny pieces and stick one on every SMT part on the board. Should work great. |
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