I'll show you guys a little bit about use a multimeter this one happens a fluke 87 yeah fluke 87 3 a pretty good meter it's getting pretty old I think I've had this thing about how about 10 12 years something like that if you notice looking at this meter you see down here it has three red ports and a black common port basically depending on what you're trying to measure you're going to use a common lead and one of the three depending on which what you're trying to measure if you're trying to measure voltage or resistance you need to what you need a meter lead in this port if you're trying to measure amperage and you need a meter lead in the common this is the big a is your your 10 amp fuse port and a little milliamps and micro amps goes up to 400 milliamps so just depending on what you're trying to measure now looking at the scale here you'll notice there's a V with the squiggly line above it represents a squiggly line like this which represents alternating current so if you're trying to measure voltage that's alternating current like what you would measure in a P on an outlet that's all all AC voltage so pretty much anything in your house you'd be using you know you put it on this one now just moving along up here you have a V with a steady line and a couple little dashes that that represents direct current so anything unlike a battery or you can also measure DC like a you know a power supply that was AC that's been rectified to DC this will pick it up move along up here this is milli volts DC so this will read much smaller measurements and moving along little horseshoe looking thing that is resistance this is a diode checker this is milliamps I notice over here this will do amperage for AC and DC same thing here you have AC and DC okay so and then course up here you have your display now this particular multimeter has has a lot more functions than just your basic one this one you can read Hertz you can do certain things like a min/max button that if your say you have a voltage that is going up and down for whatever reason you can hit the min/max button and do your test and it will record that the highest level in them and the lowest level so there's a lot of extra functions on here but I'm just going to show you guys the basics so let's say I wanted to measure a DC voltage I'll show you what I got to do first off I got to give them a black lead and put my black lead into the common the black one pretty much stays here the one you want to move is your readily depending upon what function you want to do I'm going with with measuring voltage so notice this has a V this is voltage and and resistance these two are amperage this is a higher amperage rating up to 10 amps this is very low amperage it's up to 400 milliamps so let me go ahead and put my red lead in this part this is what my leads look like got a red lead and a black lead now I'm going to throw this in DC you try to get this up we can see it know if we can see it or not oh it kind of see it now okay got it on DC volts on the black end my cut my common lead and my voltage lead let me get a battery supply so I can read it so happens I got a battery here so let me take my leads just hook them up see what we get as you can see I'm reading this is a 9-volt battery and I'm reading nine point one seven volts DC say that that works alright we get some more voltage and change some batteries together okay got two 9-volt battery stuck together I'm going to stick a lead here and lead here and see now in real if you see this from out but using 18 volts 18.3 1 volts so that's how you read DC voltage put it on DC okay let me well I got this here I'll do I some reason say we wanted to measure the resistance of something I'll check continuity got a little little switch here this is a common one of them is normally open normally closed so let's go between the common and see if we could find which one normally closed is which is this one I'm reading point zero zero one ohms that's continuity the switch here it's open push the button and I got continuity point zero zero one homes it's very low resistance okay open closed open closed ok huh let's see let me scoot this over a bit I got a very big resistor this here is a a variable resistor very large one so you're going to see if I can read it watch the display I got to hold this button down see how that's reading 21 ohms this resistor goes from from about 20 ohms to 0 ohms so let me test it here so you watch this I can try it the resistance is going down and went all the way down to about point point 9 I'd say that's working pretty good and go the other way I'm just measuring the resistance of this variable resistor this variable resistor is writ like I said rated from 0 to 20 ohms and I'd say that it's pretty good I got a simple test light I'm using as a has a light bulb built in it see the my lights working so I can measure a voltage drop see what my battery reads battery dropped to about seven volts let's having will drop you read it unloaded should be about 8.6 and I'll load the battery load the circuit it will have a voltage drop and you're in a voltage drop okay now that's how you measure voltage let me show you how to measure a current so I'm going to run a similar test here the difference is and when you're measuring current you've got to put the circuit in you got to change this lead over to average and you want to put it on average and make sure it says DC now which it does and if you can see that around so that says DC I push this button turns it to AC and I gotta measure DC so to measure current circuit has to be in series I mean the meter has to be in series with the circuit notice how I have a meter Li disconnected so when you're taking average readings you have to connect the circuit through the meter so the meter itself is going to make the connection I got to stick a lead let me go ahead and keep this lead here I'm going to touch this lead light comes on light goes off on see how that's reading cart now it's reading about about 200 milliamps and since it's so low you can actually switch it to the to the milliamp scale you can read I can read it on the lower setting when put my lead here I'm going to touch this lead see how the light comes on it's making the connection through the meter okay all right so that's how you measure average on multimeter you put it in amperage which you have to move your jack over okay so I'm trying to solve I'm going to show you guys how to measure AC voltage I'm just going to do it at a at a power outlet just to show you the basics so I got it on I got it on AC let's take the leads in them in here I gotta turn the switch and I forgot okay yeah the leads in there and as you can see reading 123 volts AC you just stick the leads in 123 volts that's how you read a C voltage