Does this device tell you the available power from a given port or does it actually measure what the plugged-in device is actually drawing?
1972078
as I use different devices, get different power outputs, so seems to be the amount the device connected to it is pulling through
1972079
It measures actual voltage and current in milliamps. It updates about the times a second. It is neat to figure out what chargers and cables work best for each device. Worth it. The other two brands available on amazon look like crap. I couldn't find this in the US. Had to buy from Japan.
644368
It will measure the kWh used by whatever is pluged in to it. It will also aggregate the total kWh used for a period of time. I used it for deciding how big of a ups I need for my nas and router.
1767527
The max output of a usb will widely vary depending on what you attach to it. If you are using this to just measure output from a non-usb thing, this meter may not work at all. For example, if I use a special charging cable that is not a data cable, this meter does not work.
31068
Answer here...Yes it will let you know how much wattage each legg is pulling when under load,and wired into your circuit panel.In your case I would think a kill O watt meter might be better,it will let you know how much power the solar panels are producing.Plug inverter into kill o watt meter and from there run out of kill o watt meter to your circuit panel.The MB75 lets you read wattage being used off of each buss in your panel so you can even out your wattage from buss A and buss B,in return making your solar panels produce and last much longer,in my case it makes my portable generator run,and last much longer.Hope this helps let me know how it turns out. Answer here...Yes it will let you know how much wattage each legg is pulling when under load,and wired into your circuit panel.In your case I would think a kill O watt meter might be better,it will let you know how much power the solar panels are producing.Plug inverter into kill o watt meter and from there run out of kill o watt meter to your circuit panel.The MB75 lets you read wattage being used off of each buss in your panel so you can even out your wattage from buss A and buss B,in return making your solar panels produce and last much longer,in my case it makes my portable generator... » Read More Answer here...Yes it will let you know how much wattage each legg is pulling when under load,and wired into your circuit panel.In your case I would think a kill O watt meter might be better,it will let you know how much power the solar panels are producing.Plug inverter into kill o watt meter and from there run out of kill o watt meter to your circuit panel.The MB75 lets you read wattage being used off of each buss in your panel so you can even out your wattage from buss A and buss B,in return making your solar panels produce and last much longer,in my case it makes my portable generator run,and last much longer.Hope this helps let me know how it turns out. « Show Less
1159792
That depends entirely on your car. The outlet in your car determines whether power goes to the device or not. Not the device.
645313
no power draw that i'm aware of, the unit is activated when triggered by an outside source.
2090910
No its not my fellow Amazon shopper. It just indicates the presencce of power in a line it doesn't provide a screen where a circuit can be measured or indicate a change in current in another circuit. Hope this helps.
1307303
This item will tell you if 1. The outlet is getting power. 2. Wired correctly. If you were told a gfci "wasn't working" it could be many reasons. But the most likely is it's a bad component. This tool would only confirm the outlet is not dispensing power. You would need to pull the face plate off to access the terminals on either side to test power. If the terminals are "live" then replacing the gfci component would be your solution. You need a multi tester to test the terminals. Or an electrician.
119492
As far as I can tell the ports as live at all times. Checked them with a simple tester.
872022
Its hard to give an estimate without knowing what the current or draw is from those devices. By looking at the Power details on the power supplies should give you all the info needed to calculate the duration.
603200
Hi, Yes, you can use the meter power it and monitor it when connected to the same source. You can also have it be powered by another unit to measure something else. The input voltage ranges from 4.5 to 30 volts. Just make sure to not wire the unit backwards as there is no reverse voltage protection. Note that the brown (or black in some models) wire is the main (common) negative wire and the red wire is the positive power wire. The other color yellow (or white in some models) is the positive voltage measuring wire. For example, you would power the volt meter by connecting it to the brown wire to the negative terminal of the voltage supply and the red to the positive terminal of the voltage supply. You then would connect the yellow white to the positive terminal of whatever you are measuring to it and the brown wire to the negative part (you'll need to solder another to it to make a "Y" connection lead). Last remark, the little screw on the back of the unit allows you to calibrate the unit, you might want to compare and make changes to the unit with another volt meter you already know that is accurate as mine was off by 0.2 volts. I hope this helps!
353981
Apparently it is powered exclusively from the USB port itself, not too certain on wattage however. There is a s/pdif out and in, and a 3.5mm line in (I use a red/white composite cable converter to play any console games). I believe the software that runs it is strictly PC, but I have no certainty that it will function in this manner.
10476
It does not provide power to any device. It is powered but does not provide power (other than through the USB ports)
1753466
No, the two ports just provide power. When you plug things in the computer see nothing.
1946757
No, it is not. It is able to tell you if there is PoE on the line and what speed the port is, but that is all.
617222
Yes, it'll read current no matter what's generating it. But what you really need is to put a load on the battery and see how long they last. You can calculate how much power they deliver.
644367
You can see how much power your using...works as described. I use it to see how much power I will need and then I know how big a solar panel or energy generating bike I will use to go off the grid.