Oscilloscope which show you the whole sine wave measured in voltage so you can see the peak on both half of the sign wave and shows out the readings and measurements

What a neat demonstration -- Thank you!

@acservicetechchannel

10 ай бұрын

You are so welcome!

Awesome videos Craig. Can you make an ecm to psc conversion video in the future, thanks.

Been awhile. Thanks as always!

@acservicetechchannel

10 ай бұрын

Thank you for watching our videos!!

Could you please make a video that explains condensate blow by off of the evaporator coil. I have a goodman package unit where the condensate drips down the evaporator fins but before it gets to the evaporator pan it blows off of the evaporator straight into the plenum. I can't figure out what causes this to happen, and how to correct it.

Great explanation and demonstration for peak voltage.

@acservicetechchannel

10 ай бұрын

Glad it was helpful!

Hey you the full Bridge rectifier and a capacitor to make DC current to get to LED Christmas lights so they do not flicker I got about 162 volts DC

Hi I am a electronics lover in the video u explain the plate measure is in DC current when DC stands for direct current so did u mean that you were measuring amps in DC upon discharge cause that's a short condition an would ruin the meter what. Kind of meter is that an I'm sorry for asking this way but want to know a valid cap check without a cap tester that's min 80 plus dollars thank you for clarifying if u can

You could use a diode and have instant result

@Viper81766

10 ай бұрын

How can we use the diode to test this ?

@MariuszChr

10 ай бұрын

@@Viper81766 stick on one of the leads supplying mains to the capacitor. It will charge it one way, but will prevent discharge. So capacitor will start charged at peak voltage.

@Viper81766

10 ай бұрын

@@MariuszChr Thanks . I didn't know that 💯

Wonder where it went!

Question. I monitor our home's wattage with a Sense unit. My A/C was ruining smoothly, ie. the wattage was flat and smooth and unwavering. The capacitor failed, and a the tech replaced it and the A/C runs again. However I noticed the Wattage meter is reading a fluctuation in current then the A/C is running now. It fluctuates as much as 1,100 watts now. The tech came back out to check with amp meter and said it was within specs. Is this an issue? What would cause this, wrong sized capacitor? Thanks.

@MegaDysart

10 ай бұрын

Wrong sized capacitor or some kind of weird voltage issue most likely. Maybe a fluctuating voltage drop across the contactor relay due to pitting or burning from the high amp draws caused by the original capacitor failing. I wouldn't be too worried honestly

@denverbraughler3948

10 ай бұрын

You didn’t specify the timeframe of fluctuations or how the actual values now compare to the prior value. The load on the compressor isn’t constant unless it is maxed out. So normally the load should be varying during operation depending on how hard the compressor has to work. Perhaps the compressor was hamstrung by a bad capacitor and maxed out below actual design capacity. Replacing the capacitor restored expected performance.

@stephendoherty1275

10 ай бұрын

@@MegaDysart My incoming is flat, so I'll check the contactor. I can't see it being the issue as the fluctuations are so persistent and regular. Thanks!

@stephendoherty1275

10 ай бұрын

@@denverbraughler3948 Thanks! The fluctuations are very persistent and actually quick, not load related. From peek to valley, time is 10 seconds. So it's oscillating 60 times a minute. Would this indicate the capacitor being undersized? (Or oversized?) No valves were touched...

@denverbraughler3948

10 ай бұрын

@@stephendoherty1275: Your system likely has an automatic valve of some sort, TXV/TEV or EEV. Any problem with the capacitor size would appear 120 times per second, not 3 times per minute. What are the actual values for voltage and current at peak and valley? What were the values prior to the capacitor replacement?

Some how I have a feeling no load voltage is going to be different from a under load voltage

You could make a game out of that

RMS 240 volts would be 339 volts peak voltage?

@supersussycat

10 ай бұрын

yes, u multiply the RMS value by square root of 2 (~1.41)

@denverbraughler3948

10 ай бұрын

Bear in mind that 240 Vrms AC is nominal voltage. The actual RMS voltage could be higher or lower.

Actually, if you measured from the bottom peak to the top peak you be able to get double that voltage. It all depends on how you are measuring the voltage. The RMS voltage is however the normal way one measures line voltage.

@denverbraughler3948

10 ай бұрын

As he noted in the video, some voltages are positive and some are negative. So he did get double the potential already.

@neutrodyne

10 ай бұрын

But he didn't add the 2 together as you would only get that if you were able to check it using a voltage double circuit.

@denverbraughler3948

10 ай бұрын

@@neutrodyne: I guess you don’t know much about arithmetic. There was nothing to add. Voltage is a difference of potential. Differences involve subtraction. But your argument is as ridiculous as claiming that 40°C would be a lot warmer expressed in Kelvins.

Wait wait. I work on overhead power line. We have to test a transformer when we make it hot and delivering it to a house or biz. It can't be any more than 120 p+or m- maybe 3%. How are u even seeing these numbers. If a hot leg is like 130 or 110 depending how far we are from the substation the transformer is questionable

Measuring direct current?

@MariuszChr

10 ай бұрын

DC. Multi meters in DC measurement mode show average voltage or current, depending what you measure.

To me it was not a clear demonstration of what RMS voltage really means. The definition of RMS is an AC voltage that will dissipate the same power as the equivalent DC voltage. Since AC is always rising and falling, it has to rise above the RMS level for a short period of time to dissipate the equivalent amount of power. It works out that the peak is the RMS times the square root of 2 (1.414…..).

And this is why an air conditioner will make a nasty sound if it it shut off and immediately turned back on

As a master electrician, 40 + years myself, I am puzzled why you are showing this. I would never use this in the profession and just confuses a student. You never even explained RMS!! Please leave the teaching to the professional trades people who are trained to do so. Thank you

@threestans9096

10 ай бұрын

i think you’re expecting more than its meant for.

@threestans9096

10 ай бұрын

hey, does electricity flow through the internal parts or on the surface of a conductor?

@alanmainwaring1830

10 ай бұрын

@@threestans9096 Actually the way we explain electrical circuit theory is grossly over simplified using what are called lumped components, like resistors Inductors and capacitors. Capacitors store energy via and electric field. It was James Clark Maxwell that developed a series of four equations that explain the behavior of all Electric and magnetic effects and came up with the notion that between the plates of an ideal capacitor that has a changing electric field between the plates produced a current called a displacement current. Field theory give a much more accurate description of how both electric and magnetic circuits work, the trouble it is more difficult to work with requires high level of mathematical development.