Review of Peacefair PZEM-051 100A DC Current Power meter

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Tested with 75mV 50A Shunt and 75mV 100A shunt at 60A, 50A, 40 A, 30A, 20A, 10A, 5A, 2A, 1A, 0.5A, 0.1A.
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The voltage across shunt resistor is measured using NI myDAQ.
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00:00 Start
00:33 Introduction
04:27 Wiring explained
06:25 Current measurement demonstration
08:59 Measuring voltage across shunt
09:44 Current measurement: 50A Shunt
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5 авг 2024

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Комментарии : 55

@mohamedsheikh2502 4 года назад

It was a great video , I had bought this unit long time ago but no inst. manual .Thanks to you now i can connect to my stand alone solar system . thanks again God bless

@robojax 4 года назад

You are welcome. Good bless you too.

@kamaledirisinghe 4 года назад

Very nice video. I learnt a lot specially how to set the transducer type.

@robojax 4 года назад

Thanks. I am glad you did.

@ruinsmars9859 4 года назад

Very informative video.

@robojax 4 года назад

Thank you.

@ArrowTheBest Год назад

Thank you very much

@robojax Год назад

You are welcome. The best thank you for me is to subscribe to my channel. Your subscription is stamp of approval and my videos will be suggested to more people and this will help me. I appreciate it. thanks❤️

@smithyjames2857 Год назад

Hi very helpful video is it possible to test on a bench top dc power supply only using positive and negative how many amps to turn it on to display thank you

@normanhosford2506 5 лет назад

The circuit diagram measures voltage from shunt Lo to DC+ rather than from DC- to DC+. That seems to assume an IR drop of 0 through the shunt lo to DC- wire. That is probably close for low currents but I am inclined to attach that wire directly to DC- to measure the supply voltage and calculated values to include the energy dissipated between the shunt and DC-. Am I missing something?

@robojax 4 года назад

I don't have this on hand to look and confirm.

@nehemz432 2 месяца назад

Does this shows negative current when discharging and positive when charging?

@Manuel_Z_Kayaks 2 года назад

I have this same unit. I want to use it to monitor my electricity usage on my camper. Your video was a bit more details than I needed. Just to be sure. It monitors AC current or both? AC & DC? I was just looking for a simple diagram to connect it to my AC or both AC/DC if possible Thanks! Great video!

@robojax 2 года назад

this shows on the display only.

@worcestersorcerer 5 лет назад

Hi, very helpful video. Thanks. Does the logger keep a record of the energy if it is turned off? I am using it to measure the energy output of a wind turbine, which will be the DC power supply. The wind turbine will be on and off over the month I want to measure its energy output for. Will the unit record all of the energy produced, without resetting when turned off?

@robojax 5 лет назад

Hi, Thank you. Yes it does. It keeps it.

@worcestersorcerer 5 лет назад

@@robojax Excellent! Thank you :)

@slipery1237 5 лет назад

In battery monitoring it would be important to be able to monitor both charging and discharging current will this unit do that.

@robojax 5 лет назад

Yes. I have got another module that does that and video is coming soon.

@rays.2480 Год назад

Great video... Will this meter also measure Negative amps ? or only positive amps ?

@NiToNi2002 4 года назад

So is the precision higher with the 50A shunt than the 100A shunt? In other words, if the price difference is negligible (which it is), if I am only going to be using this in the range 10-40A (electric bike at 48V), is it better to stick to the 50A shunt for higher accuracy than going with the 100A (for future proofing/repurposing), or are they the same precision-wise?

@robojax 4 года назад

I should have mentioned it. But here quickly: wer have A-75mV/100A or B-75mV/50A so for 50A we are getting higher voltage and it is twice and good as 100A version. so 50A version is better. I have explained it here ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-9jwCc7uPGoc.html

@expendablecz8619 2 года назад

Hi, are you tried a non static current (dc ripple current)?I would like use it to input of solar dc/ac converter, but current isn´t static, so i don´t know, if this meter measure "average" current value. THX

@gabrielquarshie94 3 года назад

Thank you Robojax. My question is: Can I replace the shunt resistor with any power resistor like 10 ohm-10watt for example ???? When you look at the instructions on the device, you'll see that the input DC is from 6.5 to 100V. SO why do need separate power supply of 6-7V in order to make it work???????

@robojax 3 года назад

Hello, no you can't replace it. when you measure the current, there is no voltage. The device needs voltage to operate so you need separate wires. see here how the current is measured ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-nTNH-PT6-84.html Use Arduino to measure any current or use any shunt ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-9jwCc7uPGoc.html

@christophermendonca7969 4 года назад

You need to add some metel to your stunt to bring it closer to the correct amperage

@robojax 4 года назад

Perhaps.

@jovetmaniebo3904 2 года назад

what is the maximum size of wire that will fit on the meter terminals. i will be running a load with a current draw of 37-39A.

@robojax 2 года назад

each manufacturer has chart for the wires which depends and material, type, shape etc. here is one example www.cerrowire.com/products/resources/tables-calculators/ampacity-charts/

@dylanc9275 4 года назад

The one I got isn't accurate is there anything I can do?

@robojax 4 года назад

measure the voltage across the shunt and calculate the current. it is Ohm's law. See my video on using shunt ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-9jwCc7uPGoc.html

@rhuuu199x 3 года назад

can this be used in arduino? for PWM output?

@robojax 3 года назад

no. If you want to use Arduino either use this ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-z-s8UvCWGxYf.html or use this ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-xHe9RRQWMBM.html

@rrjgharvey9189 4 года назад

How do I set the voltage as my meter is reading about 50%more than it should?

@robojax 4 года назад

making is less would have been very easy to put voltage divider but making it 50% more means you need to trick the meter to read the voltage from the shunt for example if the voltage is 20mV you want to read it 30mV so you would need voltage amplifier and it should be linear. So your best option would be to use OpAmp 741 and you just need 2 resistor to set the output gain to 1.5. and 1.5=1+0.5.

@rrjgharvey9189 4 года назад

@@robojax I have to make it less. It is reading 19.5v when it should be 12.7v

@linkintiger 4 года назад

not sure why my light up with 12v but not with 24v

@robojax 4 года назад

did not understand this. which light? are you referring to the LOAD?

@linkintiger 4 года назад

@@robojax display screen

@preetheshkumar227 3 года назад

How to calibrate exact reading

@robojax 3 года назад

this shunt resistor has 10-15% tolerance. meaning at 100A you may get 10-15% error. now as I mentioned in the video (I believe I did) if you are using 100A shunt, you should not use it for less than 10A or 15A. Above that it works pretty well.

@juliusvalentinas 4 года назад

So there is no calibration?

@robojax 4 года назад

No as far as I know. It is already set.

@manfredg8410 4 года назад

I understand that the little crack on the shunt is to calibrate it. HOW? Don’t know.

@nathanfisher6925 Год назад

@@manfredg8410 since it's difficult and expensive to manufacture an exact resistance at high current, the shunt is manufactured with LESS resistance (more metal) than is in the spec. Then they hook it up to a test set and grind in that notch until the shunt's resistance has come up to the exact point in the specification. (they do the same thing with xtals, for the same reason) The calibration error is not in the shunt, in the video you can see the voltage drop is correct. The problem is in the meter, it's converting millivolts to amps, and the millivolt measurement is not as accurate as it should be. I suspect they have a way to calibrate it, perhaps during manufacture and save to that eeprom, but I don't know how to access it as sold. (mine are off by a little bit too and I would also like to be able to calibrate them)

@pablos6120 4 месяца назад

How can conect this item sir

@robojax 4 месяца назад

then what did I show in this video? please watch to learn.

@sajidmanzoor3606 2 года назад

Sir can i calculate 1000dc voltage using this

@robojax 2 года назад

no you can't. it will die.

@sajidmanzoor3606 2 года назад

How i can callculate 1200Dc voltage and when power will be 1000kw relay will be opeate

@robojax 2 года назад

This will calculate the power for you. To take some action like turning on a relay, I have explained it in the introduction video.

@DilipKumarMoharana 3 года назад

The energy indicator resets in the night, as there is no power from solar panels.

@nathanfisher6925 Год назад

no, it does not reset. (unless it's broken) The Energy total is kept when power is lost. You must access the Clr menu to reset it to zero. If your meter is resetting after power loss, it is defective. (I have over 10 of the 20 and 100 amp meters here, they all work the same, they all hold between power loss)