How to Use an Ohmmeter Basics (And I make a SUPER rookie mistake)

We show how to use an Ohmmeter Basics for continuity tests on switches as well as measured resistance on loads and I make a SUPER rookie mistake.
See if you can catch it before I announce it.
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[@deadheart556]

Excellent video, I'm sharing it with my techs. Just ran into a shorted transformer with a tech and this will help him understand how to take an Ohm reading on the coils. Explaining over the phone can be difficult

[@derekmc9580]

Great video. Makes me feel better about the time i put a 120v blower motor in an air handler that is supplied by 240v and i wondered why the motor doesn’t work right out of the box 😆.

[@bravoactual2423]

As someone who is currently in school for HVACR, these videos have been a valuable tool. Thanks a ton for making these.

[@briancarlisi2224]

Always something to learn from your channel, even your mistakes! Thanks for being open as this will make me more aware of the data on the tags in the field!

[@jamesortolano3983]

Ghost voltage,it's there not even gonna Talk about it ,but u said it best !! Always disconnect power source when checking with ohm 's Rookie mistake that still happens. Thanx Mr.O, Appreciate your time nd informative input Into our HVAC-R world!! Making things better,rock onnn!!

[@MrChipBryant]

Back to the basics. Very good information. Thank you.

[@danielwindecker3937]

It’s good to know that everyone makes mistakes that seem like they shouldn’t be made. I do that kind of crap more than I want to admit.

[@realestateservicessaleshea99]

One of my first mistakes was grabbing a 120v holding relay instead of a 24v. Live and learn, supervisor let me look at it for over an hour before he pointed it out never did it again! 😅🤣😂😂🤔🍇🏌🍺🍺🥃🍺🥃 Stay safe. Retired keyboard super tech. Wear your safety glasses.

[@mrgreen9086]

I had no idea on how exactly a meter reads ohms. I have a fieldpiece meter and a fluke, and the fluke puts out double the voltage compared to my FP I love learning new things lol thanks.

[@Trust_Jesus]

This was great!! Now for a (part 2) video you should make one hooking everything up from the thermostat!! Like from the thermostat to the transformer, then from the transformer to the contactor, then the contactor on to the hear relay and so on!! All the way through to the outdoor and indoor fan!! Just do a video of wiring everything up on that simulator board you was using in this video!!

[@Trust_Jesus]

We have a final in 2 weeks and I am having the hardest time wiring up this simulation board in the lab!! Like which colored wires(loads) go where from the thermostat and then all the common wires and where they go!! If you could make one of these video in a week or two before my final that would be great!! No pressure lol.....

[@Trust_Jesus]

We have a simulation board in the lab with 2 lil fans (outdoor and indoor fans) and 2 light bulbs one representing the compressor and one the electric heat... the other things are a transformer, contactor, heat relay, and indoor fan relay

[@TravisLang667]

Very good demo. Thank you.

[@jkbrown5496]

At 10:00, I'm pretty sure you have your thumb on one of the shading ring. The little loop of copper/aluminum that encircles a portion of the magnetic field putting a that bit out of phase with the rest so that the coil doesn't release when the AC current crosses zero. Like the large gauge copper loops on shaded pole motor stators.

[@airconditioningrefrigerati5837]

Thanks for all videos very helpful 👍👍👍🙏

[@bradenjohnson3830]

I’ve done it before, unfortunately I had let my truck stock deplete, and it ended up costing me an extra trip to the supply house. Live and learn.

[@jeremie2599]

Wow this is a great tutorial thank for you time

[@acrepairnearme]

Once at the start of my carrier I’ve grabbed a few 120v contractors from the supplier shelf. They look similar. I’ve didn’t even realize we have 120v contractors. I thought they all 24v. And guess what, I’ve changed the contractor 3 times in that day until I’ve started to look around, look on the sticker. It was a great school for me.

[@ComputerVA]

The high voltage coils mostly have insulation on the coil and the 24v ones are shiny copper with no outer insulation

[@neilvestervictor180]

great you catch the error we all human

[@WillieMakeit]

I had my inventory mixed up in my truck stock. Recently separated transformers and contractors. Made this mistake several times

[@monteglover4133]

:-) I’ve never (don’t believe that) made that mistake only wired up a fairly complex control system with the several wrong voltage coils. This from a 40+ year tech.

[@theadventuresofvm8711]

Hey Brian, I work for a decent size HVAC company in central California. Right now we sent our installers and technicians to UTI in Arkansas. But I really enjoyed your videos and your knowledge, and was wondering if you have your own HVAC school in Florida. That I would be able to send technicians and installers to?

[@nicsavage8868]

Do you have a video of ohming out gas valves?

[@nitrosturbo1]

Curious. I am wondering about the 3 way valve coil. That particular coil has to work against a load and is possibly designed differently than the other coils due to the stresses it would reapedly be under. Just curious now. 🤔

[@donnierobertson3088]

Nice job and video like always

[@65gtotrips]

🔰🇺🇸 - Well…if the the resistance isn’t printed, it can be deduced by R=V/I - As the volts and amps are more commonly noted on the tag

[@DayClanTribe]

I don't believe ohms law applies to inductive loads.

[@yashmistry7389]

Hello, Have you made any video on Inertia Air Filter, which is connected between fresh air intake & chemical filter unit?

[@jasoncogle2848]

6:42 mmmm pizza!! 🍕🍕🍕

[@BariumCobaltNitrog3n]

OL stands for OUTSIDE LIMIT (of the meter) or OPEN LINE It is not taking a measurement of any kind. It has no reference. Also, infinite doesn't apply to real things, an infinite row of houses could not exist. It's a conceptual or imaginary number referring to number sets, like the number of divisions you can make between 0 and 1. 16ths, 32nds...

[@a11ten071]

Great Job thank you!

[@pizzle1011]

Good video... 👍🏾

[@jessec.9295]

When your ohming do you have to disconnect all the wires on the relay

[@MrGarcon98]

what if you dont have another one ? and you dont know how much amps ,resistance etc etc ii should be ? kinda harder that way huh !

[@Trust_Jesus]

ROOKIE!!!! 🗣

[@lesliedaisley7846]

Where can I get those leads

[@EastDallasKicks]

I wish the field piece would just say OL instead of those dashes

[@gregmercil3968]

I have a Fieldpiece SC-480 and it’s says “OL.”

[@EastDallasKicks]

@@gregmercil3968 Hmm guess I shouldn’t have settled for the ultra base model. I got the sc240 and the size is convenient but the lack of features aren’t so I’ll look into getting a 480

[@gregmercil3968]

@@EastDallasKicks the SC480 is a great meter. The only other one they make that I’d want I the SC-680. It can do everything the 480 can, but has some features that it wish my 480 had. Only thing it’s that the 680 is gigantic. Also, stay away from the HS35, Which I also have and it sucks.

[@EastDallasKicks]

@@gregmercil3968 Ah thanks for the recommendation it really helps. I’ll probably buy the multimeter first and afterwards I’ll buy the 109$ series 41 basic yellow jacket 3 port gauges that everyone starts out with haha. I already have some but they’re old and preowned so I don’t trust the seals to not be leaking. I’m about to finish my third class, I’ve taken basic refrigeration, basic electricity, and I’m about to finish controls but I feel like most of it just goes in one ear and stays for a few days and then it goes out the other ear. Did you go to school or did you just become a helper and avoid school? Because I feel like I should’ve tried to become a helper instead of school, what would you recommend? Or really how did you get into HVAC

[@gregmercil3968]

@@EastDallasKicks I went to school for it, and despite what many might say, I feel school is very important. They teach you all the basic yet super important fundamentals in a relatively short amount of time, which could take years to learn just starting from the ground up in the field. Plus having the school training and also being EPA 608 certified (which is EXTREMELY important) gives you a huge advantage over the other new kid that just walked in without any schooling. I got into HVAC because I love fixing things and getting paid decently for it.

[@kevinpearce3281]

I’m confused

[@2kric]

Huuuumann!

[@ShawnMihelic-xq2yx]

What does "flex by hand" mean in this stupid a$$ field.. should read a steady value between 500 to 1500 ohms as leads are flexed by hand, if not pick up coil is bad bad probably won't get an answer for a year or two but worth a shot Google ain't worth a crap you don't understand this type of language