How do you hook up an amp meter

Connect the shunt in parallel with the ammeter, then connect them in series with the load. Or connect the ammeter in series with the load and the shunt across the ammeter terminals. Or connect the shunt in series with the load and the ammeter in parallel with the shunt. Make the connections before switching on the supply. All the same, whichever makes the most sense I think.

How to Use an Ammeter to Measure Current

The Jalopy Journal. Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy. Log in or Sign up. Atomic Industries www. Register now to get rid of these ads! The H. Jun 3, Posts: My mind is getting too soft. I can't remember how to install an ammeter. Do I just splice into the ignition wire? Or do I need to ground it? Nov 30, Posts: Fat Hack , Jun 9, May 23, Posts: Decide if you really need one.

Also, you need to size it properly. You don't want to use a 60 amp meter on an 80 amp alternator peg the needle, make smoke, burn down garage. If you're doing it for nostalgia purposes, just stick it in, and don't wire it up. What you really want to know, is if the battery is charging. You can see that with a volt-meter. If you use a GM alternator that has the 3-wire OK, so I'm not calling it a one-wire anymore, ha , you can make a nice idiot light that comes-on when the alternator stops making juice belt, or alt bad.

Sep 23, Posts: To make the ammeter actully display current entering or leaving the battery, which is what they normally do, you need to connect it series in the wire that connects the battery to the rest of the car's electrical system EXCEPT the big wire connecting the battery to the starter or starter relay Be careful with the wire size, routing, clamping, and grommets, there's the potential to make the car melt down with sloppy ammeter wiring.

Johnny Gee likes this. Jan 2, Posts: Plan B More acurate, safer. Sep 19, Posts: Install a Volt-meter Mar 3, Posts: C9 , Jun 10, Feb 2, Posts: SouThe Villages, FL.. Key West.. If you want an ammeter and are concerned about fire hazard, use a shunt ammeter. Only milliamps through the meter. Sep 26, Posts: What about wiring a stock type ammeter in the dash of a car?

Would putting a jumper wire across the terminals allow the gauge to still work but not fry if it failed? Automotive Stud , Jun 10, Mar 8, Posts: The shunt broke! That left the entire load of the car's electrical system going thru the gauge which was designed for the milliamp current. Sure was exciting until I got the battery unhooked! The shunt looked like an old style ballast resistor.

Chevrolet changed the design in I once had an old ammeter from a 50's mopar product which just had the wire passing thu a loop on the back of the gauge. You did not have to break the wire. It "sensed" the current like the clamp on ammeter in the picture above. No way the gauge could cause a problem. That said, I wouldn't use an ammeter on my worst enemy's car! Model A Vette , Jun 14, Apr 17, Posts: Just wire it up, I did, and don't be lazy about it.

Well so should everyone else after hearing your experience. Double, or triple insulate everything, use lock washers, make sure none of the wires are showing, they're all very good and tight and ya know maybe even install a quick disconnect under your dash. Which I know leads to more extremely hot wires running inside the car. It's really all whatever you want to do. Me, I just wired in my Ammeter and did it carefully, I insulated every damn thing and when I was done I used some strips of black duct tape to cover the back of the thing.

I've had car fires, and they fuckin suck. Just be careful. Don't blame it on the meter though, it's not the meter's fault, it's the electrician's. Colonel Ingus , Jun 14, Drtoner and Tommy bring up the most basic yet important points to consider here Shorts don't normally just "happen" Either via vibration, loose connections, metal edges chaffing through wires, poor routing and poor planning. I like to go overkill when it comes to insulating and isolating wires, something learned from my days spent messing with 4x4s and off road vehicles.

I came up with some habits that have served me well when wiring my cars: Wire it like a fiberglass car. That is to say, run dedicated ground wires to every component that might normally just be grounded to the body or chassis. I like to run new ground wires of the proper gauge back to a common bulkhead on the firewall usually that is in direct contact with a heavy gauge battery cable going to the engine block and meeting the battery's ground cable.

It's overkill, for sure, but it virtually eliminates any problems caused by bad grounds. Wear a rubber! I use various pieces of rubber hose as well as rubber grommets to insulate all wires and harnesses that pass through or lie next to anything metal. It isn't always pretty, although you can spiff it up with a little extra effort. It provides positive assurance that no 'hot' wires will get chaffed and cause a short.

Fuse it! To provide a fail-safe in the event of a component failure or short that leads to excessive amperage being forced through the harness! Fuses are cheap insurance against BIG problems such as fried components and fires! Hold 'er down! You'd be surprised at how many shorts, fires and even explosions I've seen that were caused by a battery that was able to flop around hitting everything in sight or better yet Your old shoestrings or bungee cords are poor choices I've seen some nice, high dollar cars with batteries held down by nothing more than gravity!

It's stupid Bolt that sucker DOWN! You won't get far in a lifted rig on a bumpy trail with a wandering battery Clean and tight! Corrosion and loose connections account for many mysterious electrical problems. On my cars, I make sure every connection is tight, and I use this incredible stuff called No-Ox-Id that looks and feels kinda like ear wax, but once you put a light coat on every connection, it'll protect it against moisture and corrosion and insure a good connection for years to come.

I've installed ammeters in my cars before and never had a problem with one. Of course, I didn't just pop it into the dash and drape the wires over the headers and stick them through jagged holes in the firewall Like most any other component, it's only as good as the installation Fat Hack , Jun 14, The problem is not with ammeters themselves, but with the fact that they require you to run more high current wires thru the firewall. Good post! The ammeter is not connected up, and the original GEN light lets me know how the alternator is doing.

Aug 27, Posts:

For example, they might just attach the two probes to the wire. The key to connecting an ammeter correctly is remembering that the connection. When an ammeter is placed in series with a circuit, it ideally drops no voltage as Build the one-battery, one-lamp circuit using jumper wires to connect the.

Lessons In Electric Circuits , Volume 1, chapter 1: Lessons In Electric Circuits , Volume 1, chapter 8: Because measuring current in this manner requires the meter be made part of the circuit, it is a more difficult type of measurement to make than either voltage or resistance. Some digital meters, like the unit shown in the illustration, have a separate jack to insert the red test lead plug when measuring current. Other meters, like most inexpensive analog meters, use the same jacks for measuring voltage, resistance, and current.

The ability to monitor the amperage of an automobile alternator is essential for those who have installed high-power usage equipment, whether the equipment consists of appliances in an RV or high-wattage stereo equipment such as amplifiers.

DC Amp meter, Amp hour and Watthour meter electrical connection examples for the Watt's Up meter are shown in the diagrams below. The "jumper cable" hookup.

installing an amp guage

User Name Remember Me? Baltimore Sailor. I know I've covered this ground before, but I'm still not getting it right. What I want to do is hook up my ammeter so that it will show me when the battery is getting amps from the alternator, and also show when I'm using amps when running stuff only off the batteries. It seems to me the connection for this scenario would be for the main battery lead from the selector switch to go to one side of the ammeter, and from there to the terminal on the starter solenoid.

How to Wire an Ammeter into a Car

Unfortunately it was never made, and aftermarket gauges will never match "exactly". Finding a period-correct British ammeter is not easy. There are several different styles, so you can take your pick from the examples below and choose your favorite, all are from the 50s. This type is my personal favorite since the dial reads from minus to plus, and the design is very similar to the Jaeger gauges though the font is not correct. This design is identical to the original side-illuminated full scale gauges older design like the Fuel and Safety gauges. I prefer mounting it unobtrusively under the dash using an Autometer chrome mounting cup, but I've seen others use L-shaped panel brackets or fabricate their own mounting. Rear-mounted illumination works better but does not match the side-illumination of the original gauges. This gauge also features the nice minus-to-plus scale. Also a nice one with the "classic" open face and side illumination.

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To measure electrical current through a wire, the ammeter is used. You can use it to measure very small electrical currents or very large ones. However, if you are a beginner, only use it to measure small currents.

How to wire digital dual display volt- and ammeter

Voltmeters and ammeters measure the voltage and current, respectively, of a circuit. Some meters in automobile dashboards, digital cameras, cell phones, and tuner-amplifiers are voltmeters or ammeters. Voltmeters and Ammeters: A brief introduction to voltmeters and ammeters for introductory physics students. A voltmeter is an instrument that measures the difference in electrical potential between two points in an electric circuit. Any measurement that can be converted to voltage can be displayed on a meter that is properly calibrated; such measurements include pressure, temperature, and flow. This is necessary because objects in parallel experience the same potential difference. Voltmeter in Parallel: Note that terminal voltage is measured between points a and b. It is not possible to connect the voltmeter directly across the EMF without including its internal resistance, r.

Watt's Up DC Amp Meter & Amp Hour Meter Connections

Subscribe Get digital edition. Remember Me? Page 1 of 4 1 2 3 4 Last Jump to page: Results 1 to 10 of How to wire a volt and amp meter. Thread Tools Show Printable Version. How to wire a volt and amp meter I am hoping to install a volt and amp meter, but I am struggling to understand the wiring diagram:

Wiring up an amp meter

Discussion in ' Chevy Trucks ' started by Sunshine , Feb 1, Log in or Sign up. Well almost ready for fire in the hole. Got a cheap set of gauges to keep tabs on my new engine. I got the oil pressure and water temp. The guy at the parts store today said hook one side to the positive back of my alternator and the other to my battery.

How to Install an Amp Gauge on a One Wire Alt

Whether you own a performance sports car or a motorcycle, an ammeter can be a very handy gauge to have. This tool will help you determine whether or not your alternator and battery are working in harmony. These meters are used in many cars where there are multiple pieces of equipment that are dependent on the battery. Although some cars come with a very simple ammeter already installed, for those that make additions to their car or motorcycle, it is recommended that you wire up a more professional style of the meter to ensure that everything is functioning properly and your battery is staying charged. For some components, it is very important that they do not lose power, as items that incorporate the use of computers may reset to default settings if they lose power entirely, which could harm the performance of your motorcycle or car. By installing an ammeter, you can put your mind at ease that you are on top of your voltage needs. Before beginning your project, you should make sure that you have everything that you need so you will not have to stop what you are doing to look for a tool. You should gather a pair of safety goggles, gloves that permit hand dexterity, wire strippers, a red gauge wire that comes equipped with eyelet terminals, a socket wrench, and a screwdriver.


Can anybody explain to me how to correctly wire up an aftermarket amp meter. Explained in idiot proof step by step procedure would be appreciated cause I'm not too clued up on electrics. Thanks Regards Simon. Hi guy. If you meann a VOLT meter I can help you, all you do is wire it into your positive side of the ignition or any electric gizmo that only works when the ignition is on, personally mine is wired into my wipoers switch, but like I said at the strt its a volt meter that reads my battery charge. Yes volt meters can be wired in parrell with any electrcial component they dont use any charge much so u can use them straight of ur batery it wouldnt matter of the ignition would be better tho if u can do it.

Log in or Sign up. Boat Design Net. Nov Posts: Elgin, Scotland. Hello, I'm looking for some advice on wiring up an ammeter on my boat.

DC 100V 10A Voltmeter Ammeter Blue + Red LED Amp Dual Digital Volt MeterA meter
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