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Asset Condition ManagementPosts About Infrared Thermography
Lower end IR Cameras: do you REALLY get what you pay for?
Registered Member The ultimate factor for any brand of camera in cost is resolution and temperature range. If your planning on using an IR camera for just walking by and doing closeup inspections and to just keep it in a tool box...you probably wont need that higher resolution camera. If you are planning on providing a service, or inspecting any targets that are far away such as high voltage electrical equipment, then resolution is your friend. To more directly answer your question, you get what you pay for... [ more ]
Registered Member All, I have used a high end Flir P-640 professional IR Camera for years, and after leaving that company I have used several different Fluke and Flir IR cams with good success since, mostly for industrial plant applications. As an Electric Motor Engineer with Level II training- (Not an Expert), I agree with Bob Berry above, in stating to have you understand your needs. Get the basics down first, then get ideas from potential customers about the needs such as typical distance to target, target... [ more ]
Registered Member It would also be good if some domain experts suggest some good models of FLIR /FLUKE (both are considered to be most prominent in condition monitoring fraternity) which can do well for machinery condition monitoring and generating good reports through SW interface. Hope this will not be offending to anyone. Thanks [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Mechanical Looseness?
Registered Member Very strange indeed. Hmmmm.... Over the years I have several times epoxied a thermocouple to bearing casings (and other componenents). For your case, I suspect you would have to secure the leads firmly to the support. I think you will get more views if you try this https://www.maintenance.org/fo...on-alignment-balance [ more ]
Registered Member Hi Jim p Thanks for getting back to me, thats very true, I'd have more understand if the Drive end bearing was being affected by the belts but not the centre bearing. Yes I've going to use the DTI gauge tomorrow to see if we have any discrepancies between the shaft along the bearings. I'll look into the thermocouple idea and see what I can do to start collecting data on the temperature. Your Second point is noted, I did ask everyone the question and the answer was a rather unusual one, they... [ more ]
Registered Member James Yeah, the motor sheaves are well worn and that may be the source of the unusual vibration peaks you noted in the first post. However, once I saw the pictures of the center bearing, I had a hard time figuring out how a belt issue could have any effect on the center bearing. It is still something you should fix but I doubt it will solve the center bearing problem. You can Google sources of hot bearings to get some other ideas....I am still leaning towards a lubrication problem but your... [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
AC motors
Registered Member The rating on the motor is the winding classification, it doesn't really apply to the bearing. These are effectively treated differently than the motor winding. I would not use the winding classification to determine the expected bearing temperature. If you are getting via data, plus ultrasound suggesting that you have a problem, then you definitely have a problem. The temperature increasing is really telling you that failure has begun, it is not really possible to predict how long it will... [ more ]
Registered Member The ultrasound and vibe data have agreed that there is an issue with this bearing, and now that I am seeing an increase in infrared temperatures, I have attempted to expedite the need for a scheduled repair. Again I thank you for your response. [ more ]
Registered Member Thank you for your response [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
using thermal camera for thickness measurement??
Registered Member You cannot really use a thermal camera to measure thickness. You can measure temperature, that’s what the camera is designed for. There is of course a correlation between the surface temperature, and the thickness, so in theory you could calculate the thickness. The problem with this is that you have to make some pretty big assumptions and use steady state values in conditions where they don’t really apply. This is somewhat dangerous as there will be significant errors. I would use the... [ more ]
Registered Member To the best of my knowledge you cannot use IR to determine thickness. That being said, IR can be highly effective for locating "thin spots" or areas with unwanted buildup. A visit to http://cstsolutionsllc.com/resources/ might be helpful. Thanks Steve [ more ]
Registered Member Walt, Interesting approach to screen the area of survey prior to conducting the UT. As you indicated, most of the time hot surfaces are insulated (This is at least what I saw at the facilities I worked for). Regards- Ali M. Al-Shurafa [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Mikron View Ports with Other Imagers?
Registered Member Dear Steve, Thank you for detailed information. We can compare the cost and may think to replace all standard view ports but at the same time there are very less as equal quality view ports as Mikron, I guess. It is only with germanium material which provide max IR transmission and my last experiment in class with Other Make ( Not naming purposefully ) prove only 60% transmissivity. Which is quite low compare to our existing Mikron view ports. @Registered Member I would be happy to explore... [ more ]
Registered Member Lots of issues here. The spyglass lens was designed to use with a very wide angle lens. Flir did make a version that would fit it-about 65 degree fov if I recall correctly. Worked great but very costly . If it were my facility, I would look into the cost of replacing all of the spyglass windows with standard (Cordex,Fluke, Iriss, Flir, Exiscan) round 4" or rectangular windows. Yes, it will cost a bit but you will save in the long run by not being handcuffed into using a specific camera/lens... [ more ]
Registered Member We have the same issue, its been 20 year we sell this viewport to ours customer, we have more than 2,000 viewports at our clients site. We recently did a test with OPTRIS cameras, the test was very posivive, we post the results on our site. http://infrarougekelvin.com/en...n-compatible-optris/ [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Thermography recomandations
Registered Member Good collection from various sources. For clients should be precise and what action needed. Post some thermal images of your findings on troubles is appreciated. [ more ]
Registered Member thanks KISHORE KUMAR [ more ]
Registered Member It is about having the right information for a specific type of plant, the analyst will only use what is important for the client or for the management. With this I do not want to demean your opinion, it is very clear. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Work instruction for Thermography inspection of Steam Straps
Registered Member If you are looking for standard procedures this link may help: infraspectionstore.mybigcommerce.com/standards-in-english-2016-edition/ Walt [ more ]
Registered Member Thanks Walt Stronng & Reliability, Actually I needs for ISO producers for Thermography inspection of Steam Straps. [ more ]
Registered Member Here is a temperature inspection guide for steam traps [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Conveyor Belt Condition Monitoring using Thermography
Registered Member Scout, Interesting and well said points. However do you have an IR image or two you can add to illustrate your points. I am sure images would be helpful Thanks Steve www.cstsolutionsllc.com [ more ]
Registered Member As far as conveyor belt is concerned you can use thermal imager for finding out the idler(guide roller) bearing damages in the lengthy conveyors. Considering pulley lagging you can compare the temperature with new pulley and old pulley running with same belt worn pulley will indicate higher temperature - result of high friction due to worn pulley lagging you need to have reference image for the same. hope this helps a little. [ more ]
Registered Member For the case of belts, that is to monitor the condition of the edge of the belt along the length and condition of the belt splice (joints) the Belt Scanner will do a great job. I have the information that it has been successful in mining environment saving lots of production losses. For Pulley lagging, visual inspection is the only solution I know of. Hope that helps. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Gases Detected and Minimum Detected leak rate (MDLR)by FLIR GF320
Registered Member Thanks Bob for explanation. Really appreciate your input. [ more ]
Registered Member There is no direct conversion for this. PPM is a dimensionless quantity while g/hr has dimensions of mass/time. You're going to have to multiply it by a period of time and divide it by some mass to achieve the correct dimensions, and to do this you would be making some pretty large guesses. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
division responsibility
Registered Member I would suggest to get a copy of ISO 18436, parts 1, 2, 3 & 7. [ more ]
Registered Member thanks for response [ more ]
Registered Member Ideally, I would suggest an electrician being the head man. Being trained in arc flash FR 70 is a must. but for the most part, IR is more labor intensive for electricians than mechanics due to the nature of opening countless buckets in the MCC room. Just my thoughts. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
AC motors
Registered Member Infraspection Institute has a few standards including one on electrical machinery that I usually reference. The "Standard for Infrared Inspection of Electrical Systems and Rotating Equipment" can be found: https://www.infraspection.com/infrared-standards/ I do know that some package delivery companies use infrared to walk their conveyor lines to inspect motors/gearboxes and other components. They expect their machines to be operating at a constant load so look for any changes and evaluate... [ more ]
Registered Member Our vibe guys asked me to check one they found yesterday. This is from a 250 Hp. 1800 RPM motor.The shaft is clean shiny metal so the actual temperature is considerably higher. I had them shut it down immediately as I've seen what happens when a bearing gets so hot the shaft breaks and big things go flying. Without a doubt could have found this earlier with IR but they had been watching the vibration increase for some time until they used ultrasonics to try adding grease. When they saw the... [ more ]
Registered Member Good catch, however MCA would have found a resistance imbalance well before it got hot enough to be detected with an indirect temperature measurement on the outside above the terminal board. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Unbalance, Loose Connections, Thermography how to differentiate ?
Registered Member A loose bolted connection will show a heat affected zone starting at the connection with the heat dissipating the farther you get from the high resistance location. This why I always track the heat affected zone area as you might not see an increase in temperature but you might see the heat zone growing which is a sign of things going south on you. As far as unbalance loading you would not see but a very small change in temperature on the conductor that could be masked by other factors such... [ more ]
Registered Member Thanks sir JVOITL [ more ]
Registered Member Thermography is not as simple as just taking a picture. If you have invested in an infrared camera, please spend a little more on a level one class or you'll make many mistakes, some of which could even be dangerous. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
bus bar connection inspection
Registered Member Hello friend, your company would have any thermographic inspection report to send me as an example of inspection, as the maximum temperature allowed in copper and aluminum busbars. Thank you ! M. Oliveira [ more ]
Registered Member In the past I had painted all of the bolts on the connecting points with glyptol insulating paint. We actually put the paint on almost all of the exposed metal connecting points on the electrical equipment. It took several years of pretty concentrated effort, but the pay off in good data was well worth it. Much of it was done prior to the 70E requirements. Used plastic rods with palstic sponge brushes to dab the paint where it was needed. [ more ]
Registered Member fwiw, I agree with Mark, Tank, Aubrey, Bob, etc... shiny busbar is definitely an issue here. Good catch by those guys, it doesn't jump out at you.... ...until you look closer and you can see: On the right busbar, you can see a striped reflection in the busbar to the right of the bolts, clearly not a hotspot. On the right busbar, you can see hotter temperature reflected where it goes down into the transformer. On the right busbar, you can also see a hotter temperature the left edge where it... [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Generator Exciter Brushes
Registered Member Once I get the RCA on this I will share the results. [ more ]
Registered Member Looks like the pig tails were not properly bonded to the brush. There could be also other reasons that Dave cited. [ more ]
Registered Member Question is why did the brushes become short? Wrong brush tension, brush material of construction, volt/amp carrying capacity of the brushes, grounded rotor/brush circuit, shorted rotor. Would assume anything close to 200F is a problem Dave [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Thermographic Gas leak detection
Registered Member There are longwave and mid wave IR cameras. The E5 is a longwave camera. For gas detection you need a mid wave camera. Midwave is 3-5 uM and Longwave is 8-12 uM. [ more ]
Registered Member The spectral response of the camera is not a match for the requirements to image the gas. It has nothing to do with the temp of the gas, or the detector sensitivity. [ more ]
Registered Member Bob Can you provide the reason for your response. I am assuming it has to do with the expected temps of gaseous LP and sensitivity of the detector? Jim P [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Limit of Temperature in Motor Bearing and Motor Body
Registered Member I would think that application of a rule of thumb like what you propose would be highly dependent on both the type of motor and its size. There are numerous cooling methods (see attached) and probably temperature profiles for each. The attached by the way is several years old and at one time was under revision. [ more ]
Registered Member Many years ago I was told by a knowledgeable motor guy that when walking around taking non contact measurements of grease bearing motors (during vibe collection) that the hottest spot on the bearing should be within 10 degrees F of the hottest spot on the motor skin. I don't know if there is a technical basis for this rule but it sounded logical to me. Has anyone else heard of this rule of thumb? I wish I had written down all of these type of nuggets I've heard over the last 25 years, it... [ more ]
Registered Member The questions are a bit general, so will be my answers. If you are considering the feedback for an acceptance testing, I would recommend to find what your contract says. Poorly written contracts sometime do not specify a clear reference for the acceptance values. For setting a motor protection (shutdown) on temperature reading, it is important to consider the manufacturer recommendation (which is based partially on the design specifications). Insulation class is an important factor to know... [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Motor contactor 2 of the 3 overloads are warm
Registered Member Here is a follow up scan. All three heaters were replaced and lugs torqued. [ more ]
Registered Member Originally Posted by Xracer: When I measured the amp draw, I was using a clamp on amp meter. The values were .9-1.0. For simplicity, I recorded them as all 1.0 amp. I'll update once the work order has been completed and the followup scan has been completed. Dear Xracer, Do you have up date for this situation...(I am newbie in IR).. Thank you Jono [ more ]
Registered Member When I measured the amp draw, I was using a clamp on amp meter. The values were .9-1.0. For simplicity, I recorded them as all 1.0 amp. I'll update once the work order has been completed and the followup scan has been completed. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
IR Windows in Switchgear
Registered Member We had a similar experience with a new substation. Our engineering department contacted the OEM and was told it was ok to remove the plastic. Electricpete I think the tape is a great idea and would give you much higher emissivity than the bare metal. I wish I could tape or paint many terminations and bus bars. [ more ]
Registered Member I agree, it's odd and defeats the purpose of the windows. They could probably wrap the bare metal in heat-shrink Raychem tape instead of those covers. The tape wouldn't give you a perfect view, but it would be lot better than with those covers. [ more ]
Registered Member I wouldn't remove anything without our people and OEM buy in. With these covers installed it will limit the quality of the IR scans. It just seemed odd that they would put in 3 windows arranged to "see" the connections then cover them up. Switchgear Eaton Cutler Hammer Type VC-W 4760 volt rated [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
IR Scan Survey, What do you include
Registered Member i have made some recommendations ,have a look on it .see this thread . https://www.maintenance.org/top...raphy-recomandations [ more ]
Registered Member When I started and computer memory was limited I only recorded "bad" or interesting stuff. Now that you can get memory cheap and the cards your camera uses are much larger I try to record images of most if not all of the critical equipment I survey. In some circumstances your insurance carrier or QA department might require that type of documentation. It's always better to have it stored somewhere in case you might need it because it saves a lot o explaining when thinks go bad and the... [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Permanent mounted networkable IR camera
Registered Member If you really wanted to get wild there is software that will record each camera shots individual pixel temperatures and create a knowledge base that can flag any temperatures that are a preset range over (or under) the "norm". We are road testing a few of these as part of our advanced monitoring program and are looking at large transformers and switchyard equipment. [ more ]
Registered Member The gearbox runs a step feeder for logs. The gearbox has a bell crank on the ouput to a power arm. The power arm attaches to a torque tube that in turn runs 4 dogbones that run the individual steps on the feeder. Each of these points has a bearing at each end. Our thinking is we could mount the camera in a way to pick up all or most of these bearings to monitor the temperature. Because they turn very slow (50 rpm output)with an enormous load we have proven IR a very reliable way to... [ more ]
Registered Member Big L, An IR camera is a very expensive temperature sensor to monitor gearbox bearing temperature! Do you expect someone to continuously or periodically look at the thermal image to detect high temperature? This topic just struck me as being quite unusual! Walt [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Emerson Infrared Thermography Module
Registered Member We use the MHM for vibe ,MHM is very powerful with all the tools you would want and would flow well with having the Vib data right there but we tried it and it was very slow and couldn't keep it from crashing,the IT dept didn't like it because it is in an old programing language and didn't like the support . Try Inspectrend Ive had very good luck with it from Logo computer.It is in my opinion far more powerful and user friendly and will have the datadase tracking and trending capabilities,... [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Thermography Training
Registered Member Ive used Snell for all my training but the the big 3 with Snell, ITC and Infraspection are all excellent. [ more ]
Registered Member KB: Welcome to the world of infrared thermography! I would invite you to check out training offered by Infraspection Institute . We offer Level I, II, and III Certified Infrared Thermographer courses as well as several applications courses. Courses are available as open enrollment classes or via our web-based Distance Learning Program . Feel free to give me a call should you have any questions. [ more ]
Registered Member Check out the free on demand seminars from ITC at http://www.infraredtraining.co...w/?id=60710#recorded and http://courses.infraredtrainin...869511552.1436195813 [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Anyone start to use FLIR C2
Registered Member I am using FLIR E60 and FLIR P660 for a year now. And it is excellent. It help during our condition monitoring route. [ more ]
Registered Member I am using the C2 for a couple of weeks and found a temperature problem on the coils of a DC motor during vibration measurements. This issue would have gone unnoticed as I normally don’t run around with a IR camera will performing vibration measurements. Compared to a T620 or a T460 (which I use for IR) it is a toy, a sophisticated spot meter. You can’t use it for Electrical thermography, the resolution is much too low. However If you understand its limits it is very usefull and I use it... [ more ]
Registered Member Ever operate the Flir C2, very easy to use and useful for detect anomalies. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
How would you call the severity?
Registered Member what is the severity level as per iso or ASNT standards . could you please post it . [ more ]
Registered Member My bad on the comments. IR_0025 is the follow up scan after the overload was replaced. When I original posted the "hot" image, I was going off of a 246 deg F spot during the scan. In my training books, a majority of sample severity levels are based on deg C. So, when I created/edit a report template, I included a severity level rating. Being an in-house tech, I still get asked the same question, "how bad is it", "how long will it last" etc. From the images, I believed that is was a loose... [ more ]
Registered Member In the post where Xracer said he had feedback of a bad heater he included image IR_0025, that's the one I commented on when I said it looks normal. In the initial post with image IR_0737 I agree that it's a bad load side connection. The only broken heaters I've encountered were open so they had no current flow and the motor would single phase causing the other two to get hot enough to shut the motor down. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Alternative Software to FLIR Tools+
Registered Member Flir tools plus works with windows 64. You must however install Word 32, as word 64 does not allow addins (ALL addins). There is no real advantage to Word 64 anyway, and windows themselves recommend Word 32 for most users. I have word 32 installed on two machines running windows 64, one is windows 7 64 bit, and the other is windows 8.1 64 bit. I have Flir tools plus working perfectly. If you have installed word 64, I suggest that you contact windows and tell them that you installed the 64... [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
? On Flir Tools + and re sizing measurement tool
Registered Member From the screen shot, he is using Flir tools plus, which is the equivalent of Reporter. You cannot resize the spot crosshairs, you could however use very small areas, these would have no crosshairs. You can also remove, rename or reposition the labels. [ more ]
Registered Member Flir tools is pretty limited. If you are doing a lot of reports, you would be better off with ReportIR. You could also look at 3rd party software such as Grayess. (grayess.com) This is a German company. Their Stitch products and Analyzer are very good. [ more ]
Registered Member It's only happened to me a couple times in 15 years but I've just used two images in the report when it did. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
thermography of oil transformers
Registered Member Thanks for responses . I agree that we need to make shots from different angles to see where and what is a potential problem. Connections that you see on the low voltage side and brazing is a way of connecting ends inside the transformer where there may not be insufficient connection. The load is below the nominal value and symmetrically in all three phases, although thermal imaging shows two hot places. Additionally oil analysis does not indicate a problem with the reliability of transformer. [ more ]
Registered Member Bob is right. However, there is no heating in the bushings so it seems unlikely there is a termination issue at line side of the bushings. [ more ]
Registered Member It is actually very difficult to tell from the image. You need to include more images from different angles, a good wide visual shot would also help relate what exactly is being viewed. That being said, it looks a bit like induction. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Transformer Oil Levels - Adding Oil
Registered Member Thanks Pete and JV, I will have to recheck the high side voltage. But here is what I know for now. 2) Convection cooling. No pumps or fans. 3) Sealed Nitrogen Blanket. The company has been taking oil samples since 2001. No one thought to add any oil back to the system. There is some debate as to how much oil has been removed. I calculated roughly 25 gallons. [ more ]
Registered Member Some questions which seem relevant for anyone who might answer: 1 – what is the high-side voltage rating of the transformer (345kv demands a lot more care than 4kv). 2 – Does the cooling include pumps/fans, or fans only 3 – What is the oil preservation system (conservator, N2 blanket with feed bottles/regulator, N2 blanket sealed). I have some hardcopy notes and manuals stashed away from when I used to work with transformers a loonnng time ago. I may or may not be able to find something in... [ more ]
Registered Member Before adding oil check several other things. I have quite a few that the oil level is low but the transformers are very lightly loaded. On the name plate it will show the level at a certain temperature and how much the level rises for each 10 degree Celsius temperature increase. If I got it right I just attached images of the same transformer under different loads. [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
how to choose an object emissivity
Registered Member How to Calculate Emittance was the topic of a recent Tip of the Week at our content-based website IRINFO.ORG. This Tip, and hundreds of others like it, may be accessed for free. You will find more detailed procedures in the Standard for Measuring and Compensating for Emittance Using Infrared Imaging Radiometers available from Infrasection Institute. Hope this helps. [ more ]
Registered Member Go to this thread: Emissivity Read Stephen Goodfellow's way to test emissivity. Then read John Snell's comments. At times manuals just won't do. You need a bit of training... [ more ]
Registered Member Thanks all for your comments.These values taken from Flir handbook.As the handbook mentioned the emissivity choosen based on the LW,SW and LLW.So I am confusing how to choose the proper value. Regards, [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Infrared Training
Registered Member Online Infrared Training at http://bin95.com/ir for online thermography training and certification. Online Infrared Training Center [ more ]
Registered Member Please remember frequent Uptime Magazine contributor and esteemed presenter from the International Maintenance Conference and CBM Conference and Basic Infrared Thermography Principles Book author Wayne Ruddock at http://infraredthermography.com [ more ]
Registered Member Infraspection Institute http://www.infraspection.com/ [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Temperature difference in a 6.6KV cable
Registered Member Dear, I had not intention to hijacking anyone thread. I put it here as i found the similar problem and wanted to share with the experts. Even though someone is getting irritated ,i would prefer to delete my all thread from this post. I did it. Thanks [ more ]
Registered Member You stated that the clamp was over torqued a little. I would suspect this may have damaged the cable internally and if you continue to use it I would monitor it often. [ more ]
Registered Member Why don't you start your own thread? It is difficult to deal with two different posters with two different problems in the same thread. The practice is called "hijacking" you know. D [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Best practices for Thermography Reports
Registered Member Ideally, you want a report that someone can read and have very few questions when done. My Management wanted a one-page tabular synopsis of the condition of all the equipment I monitored along with the status (i.e. OK, Watch, Needs Action, etc.). They did not need to see the 20-40 pages of details. For the Engineering and Maintenance groups, this table also contained the page # of each component so they could see the details. The detail page is created from the software and needs to contain... [ more ]
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Asset Condition ManagementPosts About Infrared Thermography
Thermography basics
Registered Member thank you [ more ]
Registered Member Pradeep Your question is ambiguous. I assume you are talking about temperature measurements using IR camera. The key thing to understand is: The camera's sensor can only measure the total amount of energy collected. It cannot tell you how much of that energy is reflected and how much is emitted (assuming an opaque object). In order to distinguish between what percentage is reflected and what percentage is emitted, you need to determine the value of emissivity (e) of the object's surface and... [ more ]
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