can this measre the amperage after it passes through the cable before it goes in the device to test loss through the cable?
579029
No.. But I understand and have measured the device used 20maSooooi. Add 20ma to your total when you need to know the whole usageI tested using a split USB cable and 2nd meter
579030
The voltage at the phone's end of the USB cord is equal to the USB port voltage (5v nominal) minus the resistive loss in the wire. The voltage drop, which we'll call dV is thus dV=I*R. The current draw on the circuit is determined by the phone; as it goes up so does dV, so increasing current yields decreasing voltage at the phone end. The current flow itself is the same at all points in the USB cord and phone, only the voltage changes -- current is conserved in a series circuit.
579031
No.. But I understand and have measured the device used 20ma Sooooi. Add 20ma to your total when you need to know the whole usage I tested using a split USB cable and 2nd meter
579032
In a circuit, amps = volts / ohms. The PortaPow works well to display volts or amperage using the switch on the device. You can't isolate the resistance of the cable by itself with this device, but as long as the voltage is within USB spec (approx 5 volts) and the current is what the charger and device you are charging call for, the cable is ok. For example, I tested my Samsung smartphone & its charger and got just over 1 amp. I'm happy with the PortaPow and would buy it again.
316385
You can but it will activate the circuit because it's probe voltage is too high, so it's really not meant to. If you want to do in circuit measurements get a dedicated ESR meter. The ESR function on this device isn't really very accurate anyway, it's mainly useful for transistor testing and LCR.
91611
Use a volt ohm meter set to continuity and touch the red probe to one prong and the black probe to the other prong. If the meter reads open or over load it is bad.
1465014
Unfortunately, it will not. It will give a lot of real time measurements and do a watt-hour summary for and time starting at the time it is plugged in but this probably won't help you. You will get real time current usage if you want to watch your amp draw current as you play with volume and speaker loads.Hope this helps.
642365
I did not try this into Amperes yetBut I am SURE this multi meter will measure even a .001 ac or dc Volt
1408535
Not with the cable provided. Since USB does not support higher voltage and amperage required by the detector it will not typically work. USB is only 5V where the accessory plug is 12V. If there is a resistor in the 12 plug it might be possible but I have never measure the voltage value.
1182843
Not with the included probes, you'd need an amp clamp to do that. Their clamp style probe has low resolution with currents under 1 amp but I've heard their thread-style amp probe is more accurate with those situations.
1963344
Well, this is optimized for all kinds of cables you might have as an audio engineer.Multimeters do the same, except this is better at testing if cables are damaged or not.. (you can bend and move the cable while its in the socket and see if it still works)Also can send a test tone for monitor calibration.
1306065
I don't think that it will. When I initially installed it I had the wires switched on the shunt (which would have just given a negative value) and it showed zero for the amperage until I corrected the shunt leads.
2090911
This device actually does work by measuring the inductance or induced magnetic field surrounding an energized conductor. I have never heard of it referred to as an inductance tester though.
1925344
You shouldn't have to. So, there's a stray current you are measuring, or there's something wrong with your meter. I'm assuming you only have one wire going through the jaws, and that you have the wire centered as best you can. Is your reading off in all ranges?
1413749
It will tell if there is voltage present. Just touch the outermost edge of both sides of the cable to make sure you have voltage on both phases.
1885059
Yes. The tester, as shown in the picture, goes between the charger/USB port and the cable to the USB device. Tester is plugged in first, then the device cable into the tester just like any other USB port.
1305058
Hi, I have this tool. You can - if the short is somewhere in the cables. You'd then first add the tone signal to the cable before the short, and then follow it using the probe. Once you pass the point in the cable where the short is located, the tone will quickly fade and dissipate. If the short is somewhere inside the pump this tool will not be of help, and you'll be better off using a multimeter measuring ohms whilst disconnecting cables one by one.
1495525
Sir, according to the user manual, you can test up to 10 amps (DC only) however, for every 15 seconds of testing, you must wait 15 minutes between tests in order to allow the meter to recover from that level of current. You can download the manual here, just click on the "Download Manual / Software link" Hope this helps. http://innova.com/en-US/Product/Detail/3320
1207557
It will read DC Amps but accurately, I was reading a 3Amp load. I would suggest with all cheap meters to replace the probes and spend a little money $15/20 on a decent set of probes. Then it will read DC amps accurately once I replaced the probes.
1942246
yes it would work for that, but youd want to be able to access the individual conductors to get a clear tone from the probe, if the wires are all inside insulation it will give you a reading but it might take a few goes to be 100% sure.