Hey thanks for watching this video. This is one class from the 2022 hvacr symposium in claremont florida. We have the symposium every year and so to find out more information, kind of upcoming go to hvacrschool.com symposium big thanks to our sponsors. For this event, which was accutools and truetech tools, they're the two title sponsors that made the event possible this session, my good buddy, tony gonzalez, a lot of you all know.

Tony he's been with field piece for a really long time as a really great guy. He talks about how to use wireless measurement tools. Fieldpiece does a great job with their job link wireless measurement tools, which i talk a lot about on the podcast and in the videos and tony talks specifically about how to use them for successful hvacr diagnosis and troubleshooting. My name is tony gonzalez.

I work for field peace. Obviously, currently i am the technical training manager um. I should give you guys an updated little bio thing, but that's that's perfect um. So i've been with fieldpiece for just over 20 years, i'm starting the warehouse repair.

Uh engineering and now we do training now and i'm trying to change the perception that training classes done by vendors are sales pitches. We have a lot of really cool application based classes where we teach best practices and how to help you do your job easier, faster and better, and so um we're trying to get the word out. We have a brand new online learning resource called feel peace university. If you haven't heard about it check it out, you can sign up and we just launched it for technicians and contractors.

At the end of last year, we have about a dozen or so different training courses on applications and how to use the tools in the field and we'll be adding more and more as we go along. Okay, um. If you have any questions about that throughout the week, stop by our booth, you know we're right there in front and we can talk to you about it as well. It's free to sign up as well.

Okay, so today we're talking about wireless system troubleshooting and how to help you do that easier, faster and better. If you have a question or anything throughout the presentation, please raise your hand um. Hopefully, it's not just like a sermon, i'm just kind of just like dictating everything. You know.

If you guys have a question comment, please feel free to ask whenever you like and be totally rude and interrupt me, it's all good. Okay, so in our industry we all kind of work, maybe in different parts of the industry. Right, like we have jobs that are residential in nature, jobs that are commercial in nature, jobs within refrigeration. Some do multiple of these things right, but they're, basically in those three different areas.

Second, is regardless of which area that you're in when you arrive on site you're. There to do one of three things: install something new fix, something that's wrong or do some type of maintenance visit. Okay, there really isn't much other than that when you break it down at a very high level after that, whether you're installing something new, whether you're doing maintenance, whether you're fixing a problem, you need to ensure that the system is running at its top efficiency and that The refrigerant charge is dialed in correctly that the air flow is set correctly and that everything that has to do with the e electrical aspect of the system is also working. The way that it's supposed to work so, regardless of what job we're on at the end of the day, it's our responsibility to ensure that that those three parameters are dialed in exactly what they need to be.

Is that a fair assessment to say? Am i missing something there? Okay perfect, so in the olden days it took time to do all of that stuff. It took time to check the refrigerant charge. It took time if we even put the time into it to verify that the airflow is correct and all of that because we had to do it serially one at a time, and if we were a good technician, we would take the time and actually do that. But what happens many times is you know we just focus on one of the parameters, usually just the charge put some refrigerant in and we're on our way right, um, but now with the advancement of technology, we can do a better job in shorter time, um to Make to make happy customers and to get more jobs done in the day which, at the end of the day, a tool is designed to help you do your job better and faster.

If it doesn't, then why do we care around that tool? Anyways right with the advancements in wireless tool technology, we now have the ability to take multiple measurements at the same time and ensure ensure that we have the refrigerant charge dialed in the airflow dialed in and the e electrical parameters dialed in this image is, is courtesy Of hvacschool.com they make awesome images and they're, so gracious to you know share them when we want to do trainings and things like that. So let me ask you a question, then: is it useful to be able to monitor refrigerant charge, airflow and electrical components? At the same time, why is that useful time, efficiency? Okay, why else they're related right, hvac system is a dynamic system right? What happens on the outside affects the inside and vice versa. So, if we're taking these measurements serially, maybe that takes us. I don't know 15.

30 minutes to do it, you know one at a time and by time we're done the first measurements could have already changed right. So having the ability to quickly connect tools at multiple locations on the system will allow us to get a better snapshot of what is going on. Okay, because at the end of the day, we're all in a business. Your business is to make your customers happy.

You make your customers happy by doing good service by building good relationships and having happy customers brings in new customers because word of mouth and having happy customers brings in revenue for your company. Yes, we want to do a good deed and we want to help others and improve cooling efficiency around the world, but if you're not making any money, it's really hard just to keep doing that. Okay, so at the end of the day, we need tools that are going to help us do that and help us achieve our goals to keep happy customers. So how do we do that? Well, i want to talk about a concept called high quality measurement.

Okay and in order to take a high quality measurement, there are certain steps that need to be taken. So let's just take a simple example. Well, actually, let's just go to step one so um. In order to take what i call a high quality measurement is we need to have a goal in mind.

What is it that we're trying to measure okay, because there's different tests that we can perform on a job site, so in order to take a quality management? Number one: we need a goal. So in this case let's say our goal is to measure superheat. Okay, that's our goal. We want to measure superheat on a system, so uh number one make a goal number two.

We need to understand what measurements do we need to? Take in order to achieve that goal. So let me ask you if my intention is to get super heat. What types of measurements do i need to take? Excuse me, okay, so we need line, pressures and line temperatures right. That's what we need.

We need a pressure and we need a temperature in order to get the superheat okay, our goal superheat. What do we need to measure pressure and temperature okay step? Number three location is key to take a high quality measurement. Okay, do i take those pressures and those temperature measurements on the liquid line? If i want superheat, no, i do not location where we place. The tool is important to having a high quality measurement.

Okay. So if my goal is to measure a pressure and temperature for superheat, where do i take those measurements on the suction line right service valve, i mean like we're really limited to where we measure the pressure. We just have the service valves and we take a temperature as close as we can to that service valve right. Okay, so now we're there after that, choosing the appropriate instrument to take the measurement.

So, let's take the example of pipe temperature. Would it be appropriate for me to bust out my ir gun and point it at the pipe to get that pipe temperature from my superheat? No, why not? It is. It is not accurate, but that's not the tool's fault. The tool is not that tool is not designed to take that type of a temperature measurement right.

It is up to us to select the appropriate tool to take the measurements that we need. So what is a more appropriate tool to measure temperature on a pipe pipe? Clamp right, okay, so we have our goal superheat. We know what we need to measure pressure temperature. We know where to measure it on the suction line.

We know what are the appropriate tools to take that measurement. Finally, the last and important part is time. When should we take that measurement? Should we take that measurement when the system is off? No, should we take the measurement shortly after we turn on the system? No, when is the appropriate time to take these measurements? 10. 15 minutes after we let the system stabilize right.

So all of these factors - you guys, are doing in your head, without even knowing it but they're all critical in order to take a high quality measurement. If one of these items is skipped, it really compromises the accuracy and the integrity of our measurement. Okay and what's great, is we do it just automatically in our mind every single day, and we don't even know about it? Okay, so remember have a goal. What do i need to measure um where to take the measurement? What tool do i need, and when do i actually take it very good, so why is taking a high quality measurement important well, there's this process that you all go through go through every single day when you arrive at at a home or at a business.

So first thing: right: there, oh uh pro tip. I need a spy on this clicker. You know how like in football, when the offense has like a mobile, quarterback linebacker, you use this sign to be a spy, always watch the quarterback. This thing i always forget where i put it down so if i say clicker, i need a spy that has watched where i put it down just help me out with that.

Thank you, okay. So first thing that we do is we arrive on site and the homeowner or the business owner tells us what the problem is in their own way right. So we take that data and we have to process it in our mind, remember our goal is to fix the customer's problem, whatever problem that they have the goals to fix. It customer tells us the problem.

We process that information and then we use our senses. We use site, we use sound, we use touch, hopefully you're, not tasting things um to understand more about how the system is performing. So what are some examples of using our senses um that we do to help understand more the problem with the system? What are some stuff that we use our senses, for we listen right, uh-huh right, so we can hear things right. We can look at things right is the condenser coil, completely gucked up with branches and dirt and leaves, and all that is the filter all dirty.

So using our senses first is quick and easy to be able to help gather more information. Remember the goal is to solve the customer's problem. In order to do that, we need to gather information, the more information we can put together, the better. We can put a diagnosis on the system.

Okay, so after we use our senses, then we need to take some measurements right to to further add data to our to our um plan here of figuring out. What is the problem with the system? Okay, we use our senses, we take a bunch of measurements and then we process that information. So now we have more information in our mind and then we communicate what what what we believe is the correct diagnosis of their system. Homeowner takes that information and has to make a decision based on the information that we gave them and the decision that they make is going to lead them to spending money either with you or with somebody else right.

So how important is it in this process that you, as the technician, communicated accurate information to the homeowner very important? Why is it very important you misdiagnose it you give them the wrong price. It leads them to make a decision that may not solve their problem right and then you leave two weeks later a week later they call back, they got the problem again and you have an unhappy customer okay. So it's extremely important to take high quality measurements and use our senses in order to communicate to the customer, accurate data and accurate information and having tools that can help us do that faster will help us keep happy customers complete more jobs in a day and generate More revenue for your company, okay, so let's talk a little bit about system, troubleshooting, uh. The way that i like to break it down.

Maybe people break it down slightly differently, but to me there's four main steps: when we troubleshoot a system uh number one, we need to understand the problem. Okay, number: two: we need to identify the problem find out what the problem is. Number three. We fix the problem.

Number four uh re-test system operation to see if our fix actually fix the problem. Okay, it's a long, complicated process, but if you break it down in a simplest form, it's those four steps. Is that fair to say? Okay? So how do we understand the problem? Okay, you guys arrive on site. How many times have you arrived on a job, and you asked a question so what seems to be your problem, my ac, don't work.

Does that help you in any way figure out what the problem is? It doesn't right, but let me ask you this: does your customer know how to communicate the problem in a way that's going to help you diagnose the system, not usually so, then, whose job is it to extract useful information for you in order to troubleshoot the system? It is your job right, so how can you extract useful information from your customer right questions? Yes, but i started with the question: what's your problem and i didn't get a good answer or i didn't get a helpful answer back right. So what kind of questions? What are some examples just give me like one or two examples of what's a more useful question to ask: that's going to help us troubleshoot it faster right. Okay, so do you feel any air coming out? That's a simple thing for them to answer, and it's going to help you um lead somewhere right. What about something like? Does your system turn on right, something as simple as that that the customer can easily answer, but that's going to give you valuable information on where to start right and then, when we ask these questions, let's just shut up and listen.

I mean i can't shut up because i got to talk, but when we're on site we're talking to our customer, let's just listen to them. Talk: okay, a lot of times we just like to keep on talking and we speak over the customer and then we don't really get anything back. Ask good questions that are going to help you and then listen to your customer. Okay, after that uh, we need to find the problem now in this whole process.

This is where the value is generated. How fast and how accurately, can you find the problem to the system? Let me ask you this: how valuable is a technician to the contractor if they get the diagnosis right 100 of the time, but it takes them all day to do it. That's not very useful to the contractor right and also goes without saying someone that gets a wrong all the time, but they do it really really fast is also not useful to the contractor okay. So this is where the value is generated in the field.

How fast can you accurately diagnose the problem? So we talked about it a little bit: visual inspection. We look at stuff, we listen to stuff, we feel some stuff, we feel air. You know things like that and then we take measurements. Remember taking measurements doesn't solve the problem for us, taking measurements is only collecting data for us to use our experience and our brains to properly diagnose the system.

You know the tool is not going to necessarily do that. For us, it is gathering data for us. Okay, we're just constantly gathering data in in order to make the most educated decision that we have on what the problem is on the system. So we do all that and then what is relatively simple is once you find the problem, you fix it right.

You replace a part you clean some stuff. Whatever the case may be, this is relatively straightforward and then the last step is commonly over overlooked is re-test the system to confirm that it is running the way that it should and it makes sense. Sometimes in the summer you know there might be. I don't know six to eight to i don't know how many jobs you guys could.

You know particularly have slated for a particular day. Usually it's a lot and it's understandable why some of these steps might be skipped, but that's what's valuable having tool technology that can help you cover all of the correct bases in a timely manner, so you can do the job faster, but still do it right. Okay, that's what we need tools for to help us do exactly just that. So in this scenario, we're going to kind of go over these three sections here of air flow electrical and refrigerant charge so other than a drill and other than a screwdriver.

What what, in your estimation, is the most used tool or measurement tool that you guys use on a regular basis? Your meter right, let's talk about using our meter, what are some of the most common measurements that you take with your meter. Voltage is where, where contacts, where else breakers incoming thermostat, what other type of e electrical measurements are you taking amperages microfarads? You know, based on the information that we've extracted from the homeowner right um, we would start with certain types of measurements now um when you're using a meter, what's important to you about that meter right setting functionality. What can a measure right? Okay, anything else we had over here ease of operation, accuracy, all that stuff right, so um. I would also add what's important: when you're using a meter is safety right you want to when you're, when you're dealing with high voltages when you're dealing with currents things electrical in nature, you want to make sure that your meter is safe.

Let me ask you this: what type of features do you notice in your meters that are in there specifically for safety reasons? Okay, so might have a high voltage, beep, bluetooth and how's that a safety thing, okay, very good. What else do you think? Okay, let me just show you real quick, a couple of things that are built strictly whoa, sorry about that with safety in mind, okay, number, one magnets on the back right, put it up somewhere like had it on the little box right there work work hands-free! What's this little side thing for on a clamp, why is that a safety feature freeze up a hand? It keeps your hand physically further away from components or parts that can give you harm right, non-contact voltage! What's that for okay, should we rely on the non-contact voltage feature as our primary check on whether something is energized or not? Absolutely not right. So non-contact voltage is more like a secondary follow-up right. We've gone on the breaker, we've shut it off.

We don't know how that thing was wired previously secondary check right. You know to make sure that things are actually off when they are supposed to be off. Uh led on the top. When you open up the clamp to take an amperage measurement can shed light in dark locations, so your hand isn't touching something that it shouldn't touch that you can't see and this tip on top anybody know what this is designed to do right, move away wires.

So we're not using our hand to spread open wires to get our clamp around a wire. So if you think about it without even realizing it there's a lot of features that are on your meters that are designed for safety, that we don't even think about right. So safety is important. Secondly, we're talking about what can the meter do right? What type of measurements can it take, and is it going to give me accurate measurements on the type of equipment that i use? Let me ask you: this equipment manufacturers are constantly advancing the technology of their systems.

It's important. Actually, it's not a question. It's a statement um, it's important for your tools to keep up with that advancement of technology. Let me give you a great example.

Variable frequency drives variable frequency drives. Are, i don't want to say they're in new technology, but last ten years or so right, um they're coming more and more common in our industry on systems? What is the purpose of a variable frequency drive? It saves electricity which saves money for the customer right. How does it save electricity up ramps down right when you need more cooling, you can ramp it up when you have a low load, it can ramp it down. Okay.

Now, how does it do that? How does it um allow the system to be able to ramp up or to ramp down? Okay, it controls hertz right and you have ac voltage coming from the power utility into the variable frequency drive box right and then that voltage goes into that box. As an ac signal, it gets converted into a dc signal and then changed back into an ac signal before it's fed to a compressor, a fan blower. What have you now in that process of changing from ac to dc to ac there's a lot of electrical noise that is generated on that voltage signal if you ever set it up on an oscilloscope you'll, see that the voltage entering the very variable frequency drive looks Like a nice, clean sine wave, usually as three phase right um. But then, if you put a scope on the exiting, the variable frequency drive that nice, clean sine wave is going to have a bunch of peaks and like things around it.

And if we don't have a meter that has the ability to filter out that electrical noise, we are unable to take an accurate voltage measurement exiting a variable frequency drive. There's a perfect example that we were reached out to by a a large commercial air biology balancing company in spring texas, engineered air balance and they work on three-phase systems all the time variable frequency drives and they reach out to us that they really liked the low-pass Filtering technology that is built into the sc680 and the sc480 meter, so we flew out there to go to their testing lab and all that stuff and basically we were doing work on a 4 480 volt. Three phase. Variable frequency drive pump system, okay, so entering the vfd.

You add 480 volts coming in exiting the controller said it was 240 volts coming out. Okay, when we took measurements with meters that did not have filtering built into the meter on the exiting vfd, we were measuring about 365 370 volts when it should have been 240. now using one of the field piece meters with the filtering sc680 sc480. It was right at 239 right at 240, volts, okay, so as technology and the equipment advances, it's critical that the tools that that that you use it's important, that your tools keep up with the advancement in technology in equipment, okay, um! So that's one on being able to take a high quality measurement.

You got to have the right tool. Your tool needs to have the right technology in order to take accurate measurements on a system now also, what's nice is how many of you are looking for ways in order to um demonstrate to your customer, the value of the service that you are providing them always Right, well, let me show you a quick, easy way on how you can do it with your meter. So the sc680 meter, the sc4 80 meter, can measure power live in kilowatts. Okay, it's a very simple process where, if you want to measure power, you need voltage and you need amperage right.

So you take your test. Leads. You put your meter on the watts, which is the w switch position, and you just use your test leads to measure the voltage going into the outdoor unit clamp this on either. If it's a single phase, l1 or l2, it doesn't really matter which one okay uh pro tip.

I would probably use alligator clips just so i can keep it on there when it's doing the measurement or you you. You could just do a quick check there and there and then you'll instantly, get kilowatts here um on the screen on how much how much uh power that system is consuming. You do that pretty much one of the first things when you arrive on site. Okay, take a power measurement.

Add it to a job like report, write it down whatever the case may be, then you go about your job. You do the service. Do the repair clean, a bunch of stuff? Do everything that you need to do at the end of the job? Take another power measurement, okay and generally, what's going to happen, is you're going to see that the power consumption will have gone down on the system? So now you have something tangible to show your customer based on the service that i just did. Your system is consuming less power than it was previously and that can help validate the work that you're doing for your customer.

You know we're always looking for ways to do that and it builds trust with your customer and it's a pretty simple thing to do. It's a quick measurement to be able to show, before and after to help validate the great work that you guys are already doing now. So any questions on electrical testing right now. Yes, sir, oh the door.

So what he's talking about is on these meters? There's a little door here that prevents you from have from from the ability to plug in your test leads and a thermocouple at the same time, and that's a safety regulation by ul that um, you are not allowed to allow the user to plug in a thermocouple And test leads at the same time, and so this is just the mechanism that we use at field piece to prevent that from happening yeah it could it could. It could like pop it on the inside right like like, if you're, if you have a thermocouple plugged in and you're touching the wrong voltage, you can damage the meter on the inside. Like would it happen every time? No, but it could happen, it could happen. Yeah.

That's what it's there, for course, we would never do that both at the same time. Right never do that, but yeah very good question. Thank you. Okay! Then, let's move on to uh, airflow, okay, so um.

When i talk about airflow, i'm not talking about in regards to the speed of the air per se, i'm talking about the airflow that is going into the air handler and out of the air handler and there's a couple quick tests that we can do to help. Um confirm whether or not our airflow is dialed. In properly we can take a delta t um. What's a delta t temperature difference air coming in air coming out? Okay, another good measurement that that is not difficult to do is a total external static pressure test.

What would that tell us it'll tell us how much resistance is. It is the air expert whoops sorry about that guys is the air experiencing, as it goes through the air handler and throughout the entire duct system, right, okay. So, let's get into that too? A little bit talk about a high quality measurement. In order to take a delta t, we need to have the right tool.

A psychrometer is the tool for that measurement. Now a tool also needs to be easy for you to use and install so. The joblink secrometer has a long, flexible wand, with the magnet on the back that you can use to stick insert into a duct. If you have the right hole size in there.

It's got to be a little bigger, but you know what i'm saying you can stick it in. There has a magnet hold it in place and you could take one of your measurements there. Also, if you're unable to take the measurement at the air handler, which is the most accurate way to take it right. But if you're unable to for whatever reason you can slide the magnet up and stick it onto a register or a grille in a ceiling or something like that and also be able to take that measurement, it's pretty simple.

If you have a grill, that's not magnetic! There's a hook on the back of the magnet that you can just hook it onto a fin and just have it sit there. Okay, so all you need to do is set up two digital psychrometers and you can easily measure what the delta t is when we measure delta t. What are we looking for? What would be considered good about a 20 degree? Difference right now. Does a 20 degree delta t tell us without a doubt that the airflow is perfectly fine? No it's another data point that we're adding to our process of figuring out the problem.

Okay, so, but that's quick and easy to do, set up two psychrometers and you've added that test to your troubleshooting process. Okay, now moving on to static pressures, every manufacturer has a rating for static pressure. What's that rating called? What's that specification called total sternostatic pressure? Sometimes it's called max static pressure in this particular equipment. It's called test static, okay, and it's saying that the test static of of this air handler is 0.2 inches of water column.

What does that mean? What is the manufacturer telling us that the test static is 0.2? What does that mean to us: okay, that's where they tested it for there, and how does that? How does that number that we measure there affect the performance of the air handler? Okay, so what they're saying is that this equipment was designed to run optimally at .2, inches of water column, static, pressure or less. If the equipment is experiencing more than 0.2 inches of 0.2 inches water column of static pressure, then it is working harder than it needs to and could potentially lead to parts failures in the future. It's not going to run as efficiently as it can, but that's what that number is telling you that that equipment is designed to run most optimum at or below that static pressure. How many times do you encounter a system that is running at point two or less of static pressure, zero percent of the time? Okay, so another measurement that we can take to understand, airflow a little better is do a quick static pressure measurement and the job link system allows you to do that quick and simple.

Now these are the this is the dual port manometer kit for the joblink probes? Do these look like your typical dupont manometer? How are they different, they're separate right? So am i lying to you when i say this is a dual poor manometer? Maybe i am. I guess it depends on how you look at it, but this was designed purposely to look different. You know you have two single port manometers here that function as a dual port manometer, with the job link app to quickly and easily take these measurements. Now, when we're talking about a high quality measurement, it's important where we take this location.

So if we're measuring static pressure on a particular piece of equipment, it varies based on the equipment type where we take that measurement correct okay. So, let's look at here what what do we have here in this piece of equipment? We have an air handler. What's inside this air, handler blower motor evaporator coil, do we have a furnace in here? Do we have a heat exchanger? No okay! So, in order to take an accurate total external static pressure measurement, where do i take the measurement on this equipment? So we take one here after the coil and after the filter? Okay, now just hold it there. For now, if we had a heat exchanger in here, would the location differ? Yes, if we have a heat exchanger in here, if we had heat, exchanger blower coil, the coil is not part of your static pressure measurement before the heat exchanger after the blower.

Okay, so based on the equipment type, we need to be aware on where we place these actual tools. Now does the position of your static pressure probe matter when you stick it inside the duct, in which way should this be positioned into the airstream okay? So you drill a quick hole. You insert the probe into the air stream problem is now. I did lost visibility to the inside of this tip.

How do i orientate it correctly? There's a red arrow on the back, okay or you use a sharpie right. This one saves you on your sharpie budget and it comes with the red arrow on there right now: okay, uh, the the dual-power manometer kit comes with your static pressure probes and they come with tubing, but because they're, two single port manometers, you can use really really Short tubes and have the versatility to install them on the system, exactly where i need to go and not be encumbered by six to eight foot tubes on either side of your typical dual port, manometer, okay, insert it in use the magnet base right here to hold It in place and you're, taking a good static pressure measurement on the screen of of your app you're, seeing a p1 value you're, seeing a p2 value and you're seeing a delta there. Okay, p1 minus p2. Now i've had some questions.

Tony, your job lean gap does p1 minus p2. I was taught that when i take total certain static pressure, i need to add those pressure values together to get my total external static pressure. But, but what i'm telling you is, even with the p1 minus p2 of the app you're still getting your total external static pressure? Why? Why am i? Why am i not lying to you? One of them is always going to be negative right. One of those values when you insert it correctly, one is going to be negative.

One is going to be positive, simple math. If you minus a negative number, you are adding those two numbers together, so you are either going to get. Let's say that our total total static came out to be 0.5 right. You are either going to get a 0.5 or a negative 0.5.

You ignore the sign it's just it's just putting those numbers together and your static pressure reading is actually or your. Your total external reading is actually 0.5. Now here's another cool thing about having the right tool. Many manometers in the industry, dual port manometers, have one pressure sensor.

They have two ports, one pressure sensor: it's a differential pressure sensor means what it's showing you is the difference between those two pressures. If you wanted to get just the p1 value, you would need to take out. You know the uh p2 probe put it into regular air, so it can do the p1 minus p2 and one of them is zero. So why is that important? With the design of the job magmanometers, you have two single port manometers, each with their own sensor, and if we were looking for a static pressure of 0.2 of what the manufacturer says that it should be, then in an ideal world we might see 0.1 on one Side.

0.1, on the other side, add them together, 0.2 right in an ideal world, but what's simply going to happen is um one side we take the measurement at the return side we get 0.4 on the supply side we get 0.1. Add those two together. That's where we got our 0.5 total external static pressure, but because you can see what the return size static pressure is and what the supply size static. Pressure is what side of the system do, you believe, has the restrictions, the 0.1 side or the 0.4 side, the 0.4 side, so having the ability to see independently what your p1 and what your p2 values are are going to.

Allow you to focus on the area of the system where you have the problem and not waste time. Looking at the entire system, okay and typically, we're gon na find high high high static pressure on the return side right, because why dirty filter undersized equipment? All that kind of stuff right, but because you have two independent p1 p2 pressure sensors, you can more quickly focus on the area of the system that has the problem and save time on the job site. Okay, you want your tools to be able to save you time and have you do an accurate reading, um quicker, okay, now uh moving on to the refrigerant charge um! This is something that you know. Everyone kind of has a has a real good understanding.

We all gauge up, take pressure, take pressure temperatures all that stuff um. We want to measure sub cooling, we want to measure superheat, we look at saturations pressures. All of that is just more data that we're using to add to our to our brain processing. What is going on with the system, so it's important to take that accurately.

You have a couple options now, with advanced technology in tools. You can use the digital manifold. What's nice about using a digital manifold, it does all the math for you right measure pressures. You measure temperatures, it does all the math for you.

I'm gon na carry on pt charts, open up your phone to get a pt chart. Whatever the case may be, you just hook up two hoses and you do all that fun, stuff, okay, um! So that's one of your options for sake of time. We're going to move on another option. Is you have wireless probes now right that can connect directly onto a system and get you your pressures and your temperatures? What are a couple of the advantages of wireless? Let's say pressure probes, cross contamination, you don't have as much refrigerant loss you're, not using hoses way lighter to carry around right.

You aren't you, don't have your shoulder strap of hoses walking with your gauge hanging down right. Sometimes it feels like really cool to have like the hoses around and we're just walking around. We just look like we know like what we're doing right so with probes we kind of lose that cool factor, but it's fine. You know we make it up on time and efficiency, but something that's really cool about the joblink probes is that um they're, the only ones with the built-in barometer to give you accurate pressure readings at varying elevations.

So, every time you turn it on auto zeroes to whatever elevation that you're at you get it. You get an an accurate reading and angle fading to help fit into tight spaces. Now a lot of questions i get asked tony: can i charge with refrigerant using a pressure probe like this? Yes, i can right, if i'm just using that no, i can't, but how can i easily move refrigerant while i'm using one of these things, xst valve core removal tool right, super simple, um! I get that question so much that i created a two-minute how-to video for field peace university on how you actually do that right. It's not it's not real difficult.

Show me how to hook it up boom, all good, okay, so myth busted all right now. I want to spend a couple minutes talking about a pipe clamp accuracy, so the job link pressure probes. We talked about where we take the pressure measurement at the service ports. Where should we take our pipe measurements for uh to get suction line pressure? Our suction line temperature liquid line temperature yep as close to the surface valve well so for evaporator superheat right, because we we could be talking about two different types of superheat, but for evaporator superheat, pretty much right there at the service port right now, um.

You have two versions: you have the regular version that can measure up to one and three eighth inch pipes like that one or, if you're, in a larger commercial application, refrigeration, you have the big dog where you can measure up to four and one-eighth inch pipe. Okay, you put it directly onto the pipe and you quickly get your pipe clamp measurements. Okay, now accuracy fail piece, has a patented technology built into both of these pipe clamps called rapid rail sensor technology, one of the downsides. These have been designed to kind of limit that, but they still you know they could still be affected by you have a single plate right here right.

This is a contact thermocouple sensor, you put it on a pipe. It takes a measurement. The only downside to that is anything that is that this metal surface is exposed to direct sunlight crud on the pipe moisture. Whatever will will will also be part of measuring its temperature, so it could adversely affect the accuracy of your temperature reading again, these were designed to be a little bit better, but they can still be affected on their accuracy.

Rapid rail doesn't work that way. It's easier to show on the bigger one, rapid rail. You have two plates on either side when you close them and these touch. You have closed the temperature sensing circuit, so it's measuring temperature right now.

If you open it, you've opened the sensor circuit and it's not measuring temperature on your app. It's just going to say open or ol you're going to get a beep single beep is good. Flashing. Green is good, oh battery's dead on this one turn this one on single beep is good.

Flashing. Green is good. When i open it up here we go single beep, good, double beep, blinking, yellow it's not measuring temperature. Why is that important? Rapid rail sensor technology, when you put it onto a copper pipe uses the conductivity properties of the copper pipe to make the pipe part of the sensor now.

So it's not a sensor that is measuring temperature on the pipe. The pipe itself has closed the sensor circuit. So you get an instantly accurate temperature reading that doesn't have to wait to stabilize down if it's been like in your truck in a hot and you put it on a cold pipe, you get an accurate temperature reading in one to two seconds uh that is not Affected by direct sunlight, wind crud on your pipe all that stuff: okay, if you put it onto a piece of pipe where it doesn't have where like it's dirty, and maybe it's kind of messy you're gon na get a double beep with this blinking yellow, you can Kind of wiggle it around to kind of cut through whatever gunk's on there, so that you get good contact on the pipe or they also come with emery cloth, where you can clean off a piece of the pipe to get good good contact. Now that might seem kind of annoying, but why is that actually helping you? Can you get an accurate temperature reading of the refrigerant inside of that pipe if you're measuring on a bunch of like insulation gunk or just crud on the pipe? No, you don't want to take that measurement at that location anyways, so you find a cleaner piece of the pipe or just clean off that piece of the pipe to get a good, accurate measurement.

Okay, so rapid rail sensor technology allows you to take a high quality measurement to get an accurate pipe temperature reading. Now, if you have an inaccurate pipe temperature reading, what is that going to affect it's going to affect your subcoin with superheat, which is going to affect what it's going to affect? What you do right, it's going to affect what you have to do? Okay, so it's important to get a good, accurate measure, meaning there so now we're going to wrap up. I know we're short on time but um. In addition, many of your joblink tools, if you have an smn manifold work in conjunction with your sms manifold, if you're not about that wire life - and you want to ditch the wires on your on your s-man digital manifold, you can purchase the job link, probes, um Temperatures and use them on your manifold wires are gone.

If you want to be able to monitor the indoor unit with your jobling psychrometers, you can have a bunch of uh psychrometers, monitor your return supply temperatures here and here your delta t and all that fun stuff. On the screen of your manifold, you can hook up your wireless scale to show your weight, so you can see your charge your weight as you look at your super e sub cooling and the new mg 44 micron gauge can also work in conjunction with your manifold And override the sensor that is built into the manifold s-mans have a micron gauge built in is that the most accurate location to take the micron measurement? Absolutely not. Okay, it's more of a convenient thing, it's better than looking at analog gauges and trying to see a needle it's better than turning on your pump going to lunch for 30 minutes coming back. My vacuum is done right, it's better than that, but to get a more accurate reading, you want to use a dedicated microphone sensor directly onto the system to be able to get a more accurate measurement and you can use that to override what you see on the Screen there, so in summary, over the last couple weeks, there was a big update to the joblink app where you can now better control your customer file.

You start with a customer assign different locations to that customer assign systems to those locations and save all your measurements and stuff with the pay subscription to job link. Job link is free, though, all this. As far as the tools are concerned, you can get all your same measurements, all your same calculations without any job link subscription and still generate a measurement report with your company logo and your company information at the top right there. So you can hand your customer or keep for your own records to see how the system was performing so wireless technology, in conjunction with the job link app and the biggest separator okay, when you're using your wireless tools, what is the single most important, uh spec on Them or the way they work, oh yeah, you know what batteries are kind of important too the range, if you don't have good range, you have paper weights right, job link system, still longest wireless range up to a thousand feet line of sight.

If you're working through buildings obstructions slightly less but you'll still get 700 feet and you can, you can cover all the major job sites that you need so that you always have connectivity on your phone and visibility of your tools. It's important that you keep in mind that your tools need to keep up with the advancement of technology in our industry. Things are changing all the time and it's important that your tools are also keeping up with that. If you have any questions.

Moving forward on wireless system troubleshooting or about the joblink system, or about philippines university or our fieldpc ambassador program, if you've never heard about that, come to our booth anytime during the show and i'll be happy to talk to you about it. Thanks for watching this video again to find out everything we have going on, you can download the free hvac school app on android or on iphone or go to hvacr hvacrschool.com and then, specifically up in the top you'll, see events to find out more about upcoming symposiums Hope to see you there thanks for watching our video if you enjoyed it and got something out of it. If you wouldn't mind hitting the thumbs up button to like the video subscribe to the channel and click, the notifications bell to be notified, when new videos come out, hvac school is far more than a youtube channel. You can find out more by going to hvacrschool.com, which is our website and hub for all of our content, including tech tips, videos, podcasts and so much more.

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