Automotive Vibration Analyzers – Part 5 of 5 – PicoScope NVH Kit

Automotive Vibration Analyzers - Part 5 of 5 - PicoScope NVH Kit



this video is part 5 of a five part series on automotive vibration analyzers in this episode we are going to be covering the Pico technology NVH Diagnostics kit which in my opinion is the best vibration diagnostic tool setup available on the market today and considering what you've seen in the previous four episodes of where the other NVH analyzers are being phased out or no longer supported I believe this is definitely the one of the best ways to go now to use this kit you're gonna need three main well four if you count the laptop you're going to need four pieces of equipment you're gonna need a laptop computer which you probably already have you're going to need some sort of a datalink USB connector that I'll just talk about those in a little bit you're going to need the Pico diagnostic kit that you can get from Pico Auto comm and then you also need some sort of a pico oscilloscope in the 4000 series so it'll has to start with the number four this one's a forty four twenty three so it's a four thousand series it's a four channels oscilloscope and you can have a two channel oscilloscope also I've got a 42 23 oscilloscope right here but both of these will work they have a pico oscilloscope module that through a USB cable connects to your laptop and turns your laptop into a fully functional high resolution high speed oscilloscope and there's some free software that you download from Pico technology and you can use this as an electrical diagnostic tool for electrical problems on a car and here's the the four channel version of it also so you're going to need either a two channel right here or a four channel oscilloscope both of these have a USB connection that just simply plugs in to the laptop computer the driver for the interface comes with the NVH I'm sorry the Pico scope software from the Pico website okay now we'll use the four channel scope but whether it's the 4 channel scope or the two Channel scope we're going to use the second input terminal channel B for vibration diagnosis and so what what we do here is you you download the software from pico Auto comm their diagnostic software once that's installed then you've got the proper driver to install the the pico scope so we'll plug in the USB cable and plug that into the laptop and it will install the driver there's red light here on the end indicating that it's act even and good to go alright then you're also going to need if you recall from episode 2 and episode 3 of this five-part series I told you to diagnose vibration problems on automobiles trucks heavy trucks we need to know engine rpm and we need to know vibration frequency at a bare minimum and I showed you some software that you had to manually record what the engine rpm was and then get the vibration frequency from whatever tool you had and matched those up on a graph and it would show you what was the what group of parts on the car was responsible for the vibration well this software will do that automatically but you're going to need some sort of a data link connector interface and this one right here is an elm327 interface I purchased this I think it's around $30 off of I forget it was either eBay or Amazon and I've tested this I've tested it on several different brands of vehicles that we have here in our shops it works with all of them as far as allowing the NVH software and NVH stands for noise vibration and harshness to interface with the ECM the engine control module on the car to retrieve at a bare minimum engine rpm and other things also but you're going to need some sort of an interface but you may have one you may have one already depending on where you work and what the scan tools and scan tool software you have that's one option another option if you work on Toyota's Toyota calls this the tech Streamlight and this is made by Drew technologies it's the Mongoose Pro MFC and this is not 30 bucks this is closer to 500 dollars but it does everything that you could possibly want on a Toyota vehicle not just communication with the engine but every single module allows for reprogramming and everything where the Elm pretty much is just ECM communications the mongoose does a whole lot more so it's certainly worth more money but if you have one of these this works and with more than just Toyota's I've tried this on a General Motors vehicle and other vehicles that we have here and it works just fine and that's because all of these are are supporting the Society of Automotive Engineers standard number J 2534 which is a serial data or data communication protocol over our can-can lines if you work at a General Motors dealership then there's a GM MDI multiple diagnostic interface module that will it's it's USB to data link connector it works just fine also when there's a separate kit from Pico scope just for GM dealers if you work at a Honda or Acura dealership they use the modular vehicle communication interface kit the MV CI and it also works I've tested it on several vehicles here with the NVH software and it works beautifully what does not work though to my surprise is the Ford VCM the vehicle communication module it does not work with the Pico scope software and the Chrysler the Y Tech scan tool interfaces the USB the the iPod are not the iPod the Y pod two miniature one let me see I've got the name of it here I forgot the name of it it is the VC iPod Chrysler y Tech VC iPod and the micro pod – neither of those devices what would work with the Pico scope software today I don't know that they won't work in the future but they do not appear to support the J 2534 interface so if you have one of the devices I've already shown you that works great use that if not I would recommend one of these inexpensive datalink cable interfaces and when you plug this in Windows is going to have to find the driver for it it uses a universal driver and it it takes a few minutes the very first time that you install it for it to find the driver software but it installs and works just fine what I have not been able to make work from the same manufacturer chipset manufacturer Elam is the elm327 Bluetooth interface it would connect with the software and then disconnect and then connect and disconnect it drove me crazy wasn't reliable there's one that uses Wi-Fi it creates a Wi-Fi hotspot you hook your laptop to it like it's it's wire it like it's the wireless network didn't work at all and then there's a newer small compact version of the elm327 with firmware version 2.1 that wouldn't work at all either and that was just with the current software that we have as of the date of this video here in February of 2015 maybe in the future something will work but personally I prefer a hardwired connection rather than than the wireless connection is just more reliable ok so we've got the Pico scope oscilloscope we've got some sort of a data link connector interface and a laptop computer and then like I said you're also going to need the NVH and once again NVH is noise vibration and harshness there's a microphone in here so we can use it for noise diagnosis you're trying to find where a weird noise or squeak rattle is coming from in a car you can do that with this kit and I'll shoot a separate video on noise diagnosis and then the V is vibration diagnosis which I'm going to show you today I've got a car with some actual problems and I'm gonna show you how this kit actually works to find the problem on the car and harshness is how hard it's shaking and so we've got this kit let me open the kid up and show you what we've got inside here we have an N VH interface box which is going to connect to the Pico scope oscilloscope itself so we're going to take this interface box along with a cable that comes in the kit and we're gonna connect the cable to the interface box and they and the cable to remember input B on the oscilloscope okay so we've got the Pico scope the cable and the NVH interface this NVH interface then has a connection on the end here that allows us to either connect a microphone for noise diagnosis or an accelerometer or vibration sensor for vibration diagnosis so we'll we will demonstrate the the vibration diagnosis today there is a magnetic sensor that comes in the kit I'm just going to screw that in to the top of the accelerometer here there's a little metal washer that keeps the magnet strong that will take off so that we can attach the magnet to something solid on the car when we diagnose vibrations but this cable is is pretty long this extension cable that connects the interface to the Pico scope is really long so you've got lots of cable on there to move the sensor around the vehicle it also comes with an extension cable to make it even longer if necessary but this extension cable works with the microphone also so we can move the microphone around on the vehicle for noise diagnosis but like I say we'll do that in a separate video okay now we'll take our vibration sensor and it's got a key D connection so we'll plug that in it's got a threaded connection so we'll just going to lightly screw that in there's a LED here on the end LED blinks periodically to indicate that the interface is powered up and working there is a battery inside of this module and so the the entire time that you have this sensor plugged in this battery is going to be slowly draining and so when you store the interface box back in the the storage box you want to make sure that you disconnect the sensor from the box or it may run the battery dead and there's just four screws on the back you can take it apart and change the battery when necessary okay so let me get this box out of the way let's just look one more time here we've got the laptop computer we've got a data link connector interface that we're gonna plug into whatever car we're gonna diagnose for vibration diagnosis we've got a USB cable that connects to a Pico scope for channel electrical oscilloscope that has been specially configured so that channel B will also interface with the Pico NVH interface box where we can connect an accelerometer for vibration diagnosis or a microphone for noise diagnosis now there are some other optional parts that you can buy and I'll show you these you know in another video that will allow you to balance an entire driveline system on the vehicle which is a much better balance than just sending a driveshaft out to get balanced because you're balancing everything that rotates the same speed as the drive shaft or a propeller shaft whatever you want to call it so we've got the laptop we've got the data link connector cable ready to go we've got the USB cable the Pico scope oscilloscope the connection cable to the NVH interface and then the vibration sensor with the magnetic tip that we've screwed on it we're all ready to go over to the car and perform some Diagnostics now on this car that I've got set up I've created some vibrations and we'll see which ones this software is able to pick up and we'll see if we can find abnormal vibrations as well as normal vibrations and I'll talk about the differences between those two so let's head over to the car okay we're over to the car this is a 2013 Chevrolet Camaro zl1 with the LSA supercharged engine a very impressive car and we're I've got some vibrations purposely set up on this for us to diagnose and what I've done here is I've got the vibration sensor right here I'm just going to attach it to the radiator support here for the moment that just for this demonstration on engine vibrations and then when we get inside of the car we will put the sensor on the seat frame for the other types of vibrations so let's bring the laptop in over here and take a look at the software okay the software right here is pico diagnostics so I'm going to double click on that down here in the bottom left it reads Pico scope 44:23 open successfully if it if it can't find an oscilloscope you may want to double check your USB cable connections to make sure everything's okay but in this version of the Pico scope diagnostic software notice we have five options off to the side here with NVH being the one at the bottom and balancing being the one in the middle the GM software version that I showed you in version 4 only had balancing and NVH it did not have compression test battery test or cylinder balance in this video we're just going to play with NVH and like I said we'll do a separate video on balancing the propeller shaft so we'll go with NVH and we're going to click on start a new test in this setup wizard so I'll click start a new test let me zoom in so you see the dialog box a little better we're going to tell it we want to connect through the data link connector through diagnostic AJ 3524 interface and I showed you that $30 one that I had from Elm on the elm327 and that's going to search for any data link connector pass-through or interface device that supports the J 2534 it'll also look for an elm327 chipset in some sort of a interface box also the elm327 is a chip people buy that chip and make their own interface kits with it so anyway we are going to click Next to continued its going to attempt to communicate with the ECM through that LM USB cable but like I said it this is just as easily could be the GM MDI the Honda MC VI or MVC I could be the Mongoose cable from Drew technologies or I'm sure there's others out there also notice it took it a minute but it says now elm327 version 1.5 connected and as the VIN number we just want to double check that's the right VIN number which it is on this cars so we'll hit next and by pulling the VIN number it knows what engine it has off of the eighth digit and what year the car is off the tenth digit it doesn't know the axle ratio where the transmission gear ratios but it can get the engine rpm based on this type of information so we'll hit next it wants to know how many cylinders as in the engine we have eight on this is an inline engine or a V type engine this is a V type so we'll hit next now they want to know rear wheel drive front wheel drive all wheel drive or four-wheel drive this Camaro is where wheel drive they want to know the differential gear ratio you'll have to look that up in the service information or find it some other way but this particular vehicle has a three point to three gear ratio on GM vehicles there's a three digit code on what's called a regular production option label and then you look that up in service information and it'll tell you what gear ratio it has so 323 so we'll hit next wants to know the size of the tires and on this vehicle we have p2 or we have 285 35 zr 20s it doesn't like the z we just leave the are so we'll put 20 right there well we'll leave the box click for use the same size value for both tires so the same on this car so we'll hit next sensor location we've got the engine compartment option or passenger compartment we're going to start with the engine compartment and it goes to the default accelerometer that came in the kit there are other types of accelerometers or the microphone available also so I'll hit next to continue tells us to tap on the sensor to verify that we have a signal and it does not look like we have the signal just make sure all the connections are good huh normally there's a little green bar that goes across here showing signal quality and it's not working at the moment so let me disconnect the sensor real quick plug it back in there were getting a little bit of movement on the far left of the bar graph there let me let me move it again let's see if it if it gives us a yeah there we go okay I don't know what happened maybe we went to sleep because I've had it plugged in for a while preparing here so we'll just hit next tells us where to attach the accelerometer that tells us it needs to be in an upright position on the inside track of the driver's seat which is a great place to put it if you're going out on a road test and that's where I would normally always begin we're kind of doing a little backwards here starting with an engine vibration diagnosis in all the years of experience I have diagnosing vibrations I've always been able to pick up the frequency that I wanted off of the drivers seat track okay so we'll hit next it says you've completed the process or you completed the setup process and now can perform an BH tests click here for help diagnosing NVH faults and it brings up a help file that gives you information on the basics of vibrations and then step-by-step diagnostic procedures for the three different types of vibrations that you can have on a vehicle typical types we have vehicle speed related vibrations of which there are two types of those we have tire speed related and propeller shafts speed related and when I say related I mean anything spinning the same speed as those so as far as tires are concerned we've got the tire we've got the wheel the brake drum the rotor or the axle the ring gear the differential case the the side gears and and on and on and on and same with the front tires for propeller shaft speed related vibrations we've got the propeller shaft the pinion gear the pinion flange the inner bearing races transmission or transfer case output shafts ALPA chaffed and so on even internal transmission pieces and then we have engine speed related vibrations that we're going to look at here right now and engine speed related vibrations are vibrations that occur that go up and down with engine rpm that have nothing to do with vehicle speed so these vibrations most of the time can be duplicated in your stall however sometimes it only occurs under a load when the engine is twisting and flexing in the motor mounts transmission mounts and so on there's also another type of vibration related to electric motors and if you noticed in the episode 4 on the GM Pico scope exercise towards the end of that exercise when we were measuring vibrations there was this strange vibration that I told you to ignore and I realized today playing around that that was the electric cooling fan spinning at about 5,000 rpm and so that would come and go so there's an example of a vibration that is picked up by the the vibration sensor that may or may not be a concern and we actually had the sensor right on the the fan shroud area and so it's it's it's normal for that to be picked up but the fan shroud and the engine and all that have mounts to dampen that out so you shouldn't be able to to feel it in the passenger compartment okay so there are step by step procedures I'll show you how to access these as we get going so we're just gonna hit finish and then let me zoom out here so you can see the whole screen okay you're not going to see anything at the moment and until we tell it to start recording so I'm going to tell it to start recording this will record according to Pico scope for 500 seconds I've only been able to get it to play back 50 seconds but maybe I'm doing something wrong but anyway what what it defaults to here we have five different options to display vibrations the one it defaults to is frequency and in this graph area here we have vibration frequencies starting at zero Hertz so zero shakes per second going clear up to 180 Hertz 180 shakes per second and then that's in the x-axis in the y-axis here the vertical axis we have forces of gravity which is it doesn't have anything to do with gravity other than it's a comparison to the force of gravity but it's it's a unit of measurement for how harsh the vibration is and so the higher these little spikes go the more severe the vibration is now there's another way to look at this that I like and it's clear over here it's bar graph so let's go with bar graph and what we have now is and all these different labels t1 t2 t3 those are t1 is first order tire speed related vibrations so that's one shake per revolution of the tire t2 is two shakes per revolution t3 three shakes and so on II won is engine first-order so one shake per revolution of the engine efore is four shakes per revolution of the engine and then we have p1 and p2 p1 is propeller shaft first-order so one shake per revolution of the propeller shaft or driveshaft as people call it sometimes or two shakes per revolution of the propeller shaft and it gives us a bar graph the higher that bar graph goes the more severe the vibration is now there's a specification that pico scope is given us and that is if it goes higher than 10 mil and we're at 3 4 5 right here then it's one that you should for sure investigate if you've got a customer complaint of a vibration but to put a specification on something that's kind of tough really what you want to do is in my opinion is find the vibration frequency that has the highest amplitude that the customers complaining of on your road test see how high the amplitude level is in in g-force here and then after you've supposedly fixed it the way you verify you've got it fixed is that g-force level should be significantly recently reduced if not totally eliminated sometimes you don't have to totally eliminate it you just reduce it and the customer will be happy so bargraph now let's talk about normal vibrations for a moment on the engine on an 8 cylinder engine we have 4 Pistons on the power stroke where the spark plug has just ignited the air fuel mixture in it forces the piston downward rapidly four times per revolution of the crankshaft on a eight cylinder and quite simply you just take the number of cylinders in the engine and divide it by two and that is the normal vibration that you'll have on that engine now there could be other normal ones depending on the engine configuration but this particular one on a v8 fourth orders normal first order is abnormal so it's it's okay to see a little bit of it here on the the radiator support and it's it's a quite low amount of amplitude but let me move it to the engine and let's watch what that amplitude level does now find a place to put it here here's a spot all right let me get the laptop lined up again with your screens you can see what's going on okay now notice that we're we're off the chart where it sit lowing read a numerical value down here 6070 millage ease it it's gone crazy and that's because we are on the actual engine side of the motor mounts and so motor mounts transmission mounts exhaust mounts body mounts are all designed to dampen that frequency are dampened the harshness the H part of NVH down to a level to where it's acceptable to the driver so if you have bad motor mounts you can end up having a higher level of amplitude for normal engine vibrations come through and there's a lot of other things that can cause that and the help file that comes with the Pico scope software lists all of those things for you to check now you we should never feel that in the passenger compartment and if you do then you you check those things so that is an example of normal engine vibrations versus abnormal vibrations and how well the motor mounts dampen things out let me move that sensor back to the radiator support okay it's back on the radiator support you can see that we're back down to an extremely low level of amplitude and so the mounts are doing what they should and so uh there's a couple of reasons I'll show you this one is to illustrate the example of amplitude the higher this bar graph goes the higher or the hot more harsh that vibration feels on the vehicle you know out of all these options for displaying vibrations I like the bar graph the best I think it's the most simple way to look at vibrations okay so now let's look at vibrations that are relative to vehicle speed and not relative to engine vibrations and to do that I'm going to need to move the sensor to the seat frame and then we'll put the vehicle in gear and run it up and see what we get okay I've moved the sensor to the passenger compartment and I've attached it to the seat frame rail the inner rail is the preferred place because it's more centered on the car but I put it here on the outer rail just so you could see it more easily but there's the seat frame and I've got the sensor stuck right to it and so that gives us a good solid connection with the chassis of the vehicle right where the driver is sitting and that will help us duplicate the customer concern better than if we have the sensor mounted anywhere else on the entire vehicle and like I said before I've never seen a vibration that I couldn't pick up the frequency and identify it using one of the vibration analyzers and previous software and I I'm sure this picoscope software is is the same so what I'm going to do now is take the I've got the vehicle in gear we've got the propeller shaft spinning we've got the tires spinning this has a limited slip differential a clutch type one I believe to wear both rear wheels are spending the same speed always now you you normally you shouldn't try to diagnose vibration problems on a hoist if their vehicle speed related because with open differentials whether it's front-wheel drive or rear-wheel drive your tire speeds will not be the same as if they were driving down the road typically with an open differential you'll have one tire that's either totally stopped and the other one spending twice as fast or some combination of anything but equal speed at which can throw off your calculation numbers and it'll mess up well it just ruins the the fit ruins the math it doesn't work for matching if you have a tire speed related vibration which is the most common type of vibration okay so I've I've got it in gear I've put it in the manual mode and even though this is a Chevrolet Camaro this as I said the software and this Pico scope nbh kit work on any vehicle I'm not using the GM interface module I'm using the that elm327 USB module this could be just easily be a Ford or a Chrysler Toyota Honda it doesn't matter the principle is the same here front wheel drive rear wheel drive differences but now let's let's take a look at the software itself as we rev this engine up and make it create the vibrations that I have caught or I've made some components have vibrations and let's see if we can diagnose what what the cause is so I'm on the bar graph mode right now excuse me and I've got the tires and prop shaft spinning I've got the engine spinning I'm in second gear I believe and I'm just gonna bring the vehicle up to a speed to where the vibration is real obvious to me I'm not looking for a specific speed unless the customer says it occurs at you know a certain miles per hour which normally they they would give you some information like that let's take a look as I wrap this up and see what we get for different frequencies so I'm going to take us up to here is 25 miles-an-hour right here notice we've got a little efore or tiny bit of e1 a little bit of t1 on the tire and we are at about 2500 engine rpm now let me take it up to about 3000 engine rpm right there that's about 30 miles an hour and now look what we have our engine vibrations are a little bit higher and that's to be expected but look at that t1 that t1 vibration amplitude level has come up the bar graphs getting a little higher notice there's a tiny bit of a p1 there also so now let me take it even higher here's 30 to 50 now look at our primary vibrations and this is at about 35 miles an hour we've got a severe t1 vibration and a pretty bad p1 so we have a tire first-order vibration and a propeller shaft first-order vibration and it's you can see that with those bar graphs being as high as they are right there remember you're not anything above 10 millage e is something that should be corrected as long as there is a complaint so let me bring it back down I'm going to hit the spacebar to save that it stopped recording right there and now I'm going to come up to the file menu click file save and I'm just gonna the Camaro and I could put the make in the model and all that over here but for this video just for quickness zl1 with a p1 and t1 vibration and hit okay it gives it a name based on the the date and time and will store it on our hard drive for us oh it says it already exist we want to replace it no we don't want to replace it I guess this maybe it's not the date and time I thought it was 15 is 2015 Oh 2 is the month and 26 is the day oh it's just the date it doesn't have the time so I'll add the time 141 there we go save and it'll save it and then we should be able to pull that up and recall it and we'll see how long how much time in seconds it's saved and that's something that we can save and show to a customer or to someone that doesn't maybe doesn't understand or believe what the vibration amplitude was before the repair and then after the repair so let me turn the engine off here so those were the before repair amplitude levels and then of course you need to go through and find what causes those we've got a p1 vibration and a t1 vibration and so how do you find what the cause of those is well right here on the screen we can come in and right there where it says t1 and right here where it says p1 we can put our mouse right there and click it tells us that it's a first-order tire speed related vibration and tells us a little bit about that that it's caused by something that's out of round I'm sorry first-order tire speed related vibrations caused one shake or disturbance per revolution of the tire click here for more information I will click and then the vibrate software help file opens and it takes you through a list of things that cause first-order of tire speed related vibrations and they're shown in the most likely cause to the least likely cause so a tire or wheel that's out of round believe it or not you don't want to just balance all the tires if you have a a t1 belt or tire vibration tire speed related vibration because tires can be out around they can be like egg shaped and I think I said it in another video in this series if a tire were square you could still balance it but as it flops down the road it would obviously cause a vibration so you don't worry about balance first worry about out of round and then you do balance and then there's all these other things that it lists for you to check and it does the same thing for a propeller shaft and and so if we come over here to p1 click on p1 tells us what first-order propeller shaft vibrations mean or what you know what defines that click here for more information and now it pulls up a context-sensitive help file up for what can cause first-order tires or propeller shafts speed related vibrations and that context help file comes up for every type of vibration tire speed engine speed propeller shaft speed and other speeds we can do the pulleys on the engine if you thought you had a belt-driven or gear driven accessory with a vibration okay well this has been kind of a lengthy video but vibration diagnosis is not guesswork it can be very precise you can really waste a lot of time if you don't have the proper tools and the proper training and this is the proper tools the help file that comes with this gives you step-by-step instructions for diagnosis once you've narrowed down which of the bars on the bar graph and it could be more than one I showed you two different ones here on the same vehicle a p1 and a t1 that isn't very common normally it's just one of those bars that'll be up there and it's just a step-by-step process to go through and diagnose those so as I said I believe the Pico nbh interface or NVH diagnostic kit is a fantastic kit I think it's the best on the market today and it is expensive but it's a lot less expensive than guessing and wasting your time and money it throwing parts on the vehicle and you've all probably seen vehicles where you've wasted way too much time and put parts on that didn't make any difference and and this software will help you eliminate that wasted time and eliminate putting parts on that won't do any good so this has been a demonstration of the Pico NVH diagnostic kit have a good day

21 Comments on "Automotive Vibration Analyzers – Part 5 of 5 – PicoScope NVH Kit"


  1. so much crap , cost more to buy the tools , in few years all of that will gone . they will come out with different tools so you'll have to buy them again bla bla bla bla fucking cars . waste of money !!!!!

    Reply

  2. IT IS EXPENSIVE PART. I WONDER HOW LONGER THE WARRANTY IS. IS IT THE SAME 1 YEAR WARRANTY LIKE THOSE UNRELIABLE , OVER PRICE , WORTHLESS SNAP OFF, SPX, ESP SMOG MACHINE

    Reply

  3. would you be able to use the nvh for missfire,transmission shudder, etc type diagnosis and what order would I look for if possible.

    Reply

  4. Superbly presented: I enjoyed watching this and your other presentations. Keep them coming. Of course, the latest 3 and 4 axis versions offer even further opportunities. Thank you!

    Reply

  5. Great video, much appreciated. I have a strong vibration in steering wheel with car in drive or park not moving. Would you mount the sensor to the steering wheel? Or steering column? Does the acceptable mg change as you move the sensor ? example the steering wheel really shakes, if we mount it to the steering wheel I'm sure it would be a higher reading than the column. I also have a driving vibration and not sure if there related. Thank for the education, fantastic video. Can I hire you to diagnose my car? Well done😀

    Reply

  6. Would out of round wheel hubs that don't emit a whining sound be listed as a tire 1 vibration?

    Reply

  7. the obd 2 interface is for example the link to PC based scan tool that communicates with pico software? I work for kia and hyundai and they use a VCI, that's wireless. but can also be used hard wired. Tha'ts what where talking about?

    Reply

  8. Excellent tutorial – a very thorough explanation of the hardware and software

    A quick addition: In your video you mention about adjusting the signal history size from 50 seconds. You can do this by increasing the value in the Maximum Signal History Size field on the setup tab. In some older versions of software you have to enable Advanced Features to get to this.

    Reply

  9. AS MELHORES SOLUÇÕES DE TI PARA PEQUENAS E MÉDIAS EMPRESAS www.diagsti.com.br/#!solucoes-de-ti-para-pequenas-empresas/p1kjb

    Reply

  10. What oscilloscope model you are using? on Pico website mentioned only 4423, 4225, 4423, 4223 are supported NVH, https://www.picoauto.com/products/noise-vibration-and-balancing/picodiagnostics-nvh-kit

    I am looking for cheapest oscilloscope to own a NVH equipment.

    Reply

  11. How would you go about finding a vibration only while accelerating around 25 mph (new jeep)

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  12. Looking forward to the noise video. Could this tool replace a chassis ear for noise diagnosis? The vibration diagnosis looks very impressive.

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  13. pls include the calculations methods to trace the source of vibrations from the frequencies also. thanks

    Reply

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