How useful is the volt/ohm graphing? whats the screen time frame? Thanks
1954381
i use this instrument in my auto repair shop. i find the volt/ohm/ampere function very useful. i don't know what you mean by time frame but you can measure AC voltage and it shows freq and duty cycle. I can also look at the Oxygen sensor output signal thru the OBD connection. i hope this answers your question.
2216276
It's not a bad meter for the price. Measuring high currents is easy with Hall Effect probes (which is what they have to be to measure DC without breaking the circuit). Hall Effect current probes are far more expensive than AC probes that you see everywhere. Large current Hall Effect probes are easy to make and priced accordingly. Low current Hall Effect probes like this one are tough to make and cost much more. It's all in accuracy and post-zeroing drift. A lab quality, professional Hall Effect probe that has low current capability like this one could cost well over $1000. This one works pretty well though, especially considering the price. The +/-2.5% is: whatever it's reading, in this case say the meter reads 0.500 Amp, this means the meter could be off by as much as +/- 2.5% of this reading or 0.500 A +/- 0.0125 A, or in other words, with 500mA showing, it could be off by as much as +/-12.5mA from this value. The counts part is not related to the +/-2.5% accuracy so it either adds to or subtracts from this error by saying that the meter, showing 0.500 A, could be off by an additional +/- .01 A. The counts thing means that on this scale, the meter displays to 3 significant digits (those to the right of the decimal point). The right most digit is the minimum the meter can respond to. The "count" number of +/- 10 digits refers to this last digit, which in this case is .001 A (1 mA). So in this case the meter reading 0.500 A, could be off by the sum of +/- .0125 A (2.5% of 0.500 A) +/- .010 A (+/-10 digits of the farthest left digit, which on this meter scale is +/- 0.010 A). Watch this video. http://www.youtube.com/watch?v=1sq2WRGPABw
822499
Rated for up to 6oo volts AC or DC. (Any location). I should note that my initial interest in this product was peaked by thinking the description suggested that it was capable of reading and measuring voltages by mere inductance, which turned out not to be the case. It still uses the probe tips for voltage readings, and using inductance for voltage detection like any other proximity sensor (light and beep) indicator.
1665215
The unit is designed to measure voltage, amperage, resistance (ohms), dc, ac, at all levels. So whether it is a computer, TV, Stereo, outlets or lights it is a terrific tool to diagnose problems in those areas assuming you know with the readings should be. I used it to measure brownouts in my neighborhood when the power company would lower the voltage during peak demand periods. I saw the voltage drop from a normal 120 VAC to 108 and when I lost some electronics, the power company reimbursed me. As voltage drops current increases (ohms law) so the electronics get fried. I hope his helps.
860528
Sorry I can't help you on this yet. I bought these units to give me readouts on my battery supplies for my solar power system and I won't be putting the system together until this summer. The meters are in Montana at my cabin and I will be here in North Dakota working until spring. So don't have access to them or the paperwork that may have come with them.
489298
I bought one of these from someplace on Amazon. It does show volt level and it I believe it did show amps coming in from the panel.HOWever, I am sorry to report that this item quit all by itself in about a month. I called Amazon and they arranged for me to send it back and they refunded my credit card. I am now using a cheaper charge controller that at least works but no display other than lights.I really liked this item, but I need it to work properly and for a really long time.
1067390
Right around .50 Ah ...not very much at all considering... I was worried about it drawing too much energy from my solar panel charging system, but its pretty negligible...you could always throw a toggle switch in there to save battery drain if your worried about it. Ive had no problems with it on my system for three years running now...just on here getting another one for a friend! I use one around the shop too for a portable voltmeter... the accuracy is right on the moneynwith my 89$ voltmeter at work...hope this helps, and I do recommend!
152639
This depends on so many things, including how much load the computer/monitors/etc. are taking, and how old the battery is. A nice thing about this model is that it has a digital readout which will tell you how many minutes. Generally, it will be a few minutes only.
911091
As they said - and for new users - voltmeters are in parallel (red to red, black to black) so DO NOT draw current other than their own tiny working about 10~20mA for themselves.Adding a resistor ahead is only done if feeding it more than its operating voltage and for only experts - this unit does3~30V so 12V is perfect within range.(AMPMETERS on the other hand are in series so they must be rated within or for the desired load you use - like water flow IN a hosepipe) (and have special resistors supplied if needed)
1563541
Joe; This statement is a brag by the manufacturer that it is capable of monitoring the voltage of a sun charged battery and very low current draw. Mine works great on my model steam engine/dynamo. I was looking for an analog meter and settled for this because of size, price and low current feature. You can view my usage at YouTube, just copy & paste in Google this address --> ( https://www.youtube.com/watch?v=Q2fYZok1SBc ) ..........David Szromba
875127
Take a digital Volt meter and it will tell you if it is positive of negative.Don
1380811
This monitor doesn't have a voltage sensor (AC current is measured by inductive clamps and the voltage is entered manually on the display), so it can't compute power factor or adjust for phase mismatch. I haven't tried to check its accuracy, but other reviews I've seen have said that people find it to be reasonably accurate.
1687912
I've used the MS2108 to measure 12vdc parasitic current on my RV. Not sure of the overall accuracy (don't have another meter to compare with), but it did seem to be reasonably stable down to 100ma (only used the clamp-on function). I didn't make any measurements less than 100ma, so I can't comment on measurements less than this.
1401025
Who knows how accurate these cheap gauges are... Checked mine with my analog meter: slightly more than 12 volts at the battery - perhaps 12.1 or 12.2. 12 volts at the terminals on the back of the gauge while the gauge read a hair more than 12. Yours might be different of course.
1205843
I use the 381 meter once a week or so, and always keep an extra set of batteries in the case Pros: the amp clamp (spaghetti type) , the remote display and the fact I can use the hand held unit to read DC current.Cons. Battery life sucks, the display only goes to tenths, would like more resolutionI have one at work and one at home So yes good meter for basic troubleshooting, if you could live without the remote display, the Fluke 376 is the same but a little smaller.
353901
How did you try to measure 24 volts? If you used 2 twelve volt batteries in series make sure they were connected one + lead to the other - lead. Or try to measure 3 nine volt batteries snapped together. You should get 27 volts. I think there is a calibration pot on the back of the meter. It is very small and you will need a jewelers screwdriver to adjust it. Make sure the red lead goes to the + termingal of the battery. Try again and let me know. You could have a bad batch of meters. Mine worked very will on my power supply that goes up to 27 volts. One last thing...are the 24 volt batteries you are measuring good batteries? The meter might be telling you that they are not. Hope this was useful. Also be aware that all meters have a percentage of error. Some are + - .1% + - .01%. No matter how expensive the meter it will have error tho very small. The smaller the error, the larger the price. These cheap but beautiful meters are good enough for battery monitoring. I wouldnt use them to build a computer power supply.
1714292
Has anyone measured the actual output DC voltage when this unit is supplying 2.1 amperes of current? If so, what did your volt-meter read?