Will this meter read negative voltage? If I connect it to a source (a current transducer) which outputs between -5 and +5 VDC will the meter read?
789074
The meter supply with polarity connector, black and red wire, which represent minus and plus. The unit does not work at all if change polarity.i do not know what will happen if connect minus 5 v and plus 5 v. without ground. I assume it will not work or just show something wrong. Also, I take a look on surface mount parts and see that red wire via connector goes to diode. You may order this little thing just for few $ and blew up it under your desire in many different ways.
789075
I am guessing "NO" since I originally had the wiring polarity hooked up backwards and didn't have a reading.
789076
It will not operate on voltages less than 3 VDC and it will not operate if the leads are connected backwards (negative voltage) Two wire voltmeter have a very limited use, especially for people without some basic knowledge of electricity.
636021
Yes..Put Your red lead on the ground. The Black or ground lead to the neg. voltage. To the meter, the ground will appear as a positive voltage in comparsion to the negative voltage.Read the meter just as you would when measuring a positive voltage.
1846092
When testing polarized parts, such as a diode. It should only allow current in one direction. When you try to push current through it in the wrong direction it will read .0L, because it wont let anything through. I had to check diodes for a power supply. When I connected it in the correct direction, it read .5, but in the wrong direction, .0L.
2034021
No, it cannot. In order to use the probes for a current measurement a shunt would be provided across the black and red terminals which would make the voltmeter useless. If your looking for a clamp-probe type meter that will also perform inline current measurements, look for a meter that has three probe terminals. The third terminal is used with a built-in shunt thus allowing current measurements using the supplied probes. Hope this helps.
1654126
I would not do that. I don't think it will give you a true reading of the battery condition. I ran a dedicated pair of wires from Positive & negative battery terminals to the meter. I installed a small toggle switch on the dash & broke the negative wire thru it so that the meter only draws current when the switch is on. otherwise it is always draining the battery. Hope this helps.
812011
Yes, it reads AC and DC amps 40 to 400. The ranges are separate, you can set the dial to 40 or 400 so that is correct. The voltage is also AC and DC and we'll go up to 600 v. Hope this is helpful to you Tom
945405
I do not know of any meter that does that. To read DC Amps, you have to remove a lead wire from it's termination point and attach one of the leads from the meter to the wire end. Then you attach the other meter wire to the now vacant termination point. In short, the meter acts as a part of your power wire.
1917743
The aux pwr connection must be at least 4v. The min volt reading can read down to zero v with the same accuracy...it cannot read negative Volts.
603197
Yes, that will work. The meter reading will indicate the value of the power source voltage. Instant battery voltmeter if that's what you want.
66953
YesVoltage side, red wire to +5Vdc supply and black to 5V negative side.meter will read 5.0VdcThen On the current side, red wire to +2Vdc, and load + side.and load negative side to yellow wire.Black wire to 2V negative side. now the meter will read 2V load current.
789576
Hello! My numbers are the same for output voltage. It reads: 5.0 V = 2.0 A. It's a great product!
1925345
Most everything I use the meter for is DC components. If you're seeing activity behind the decimal point, these readings may be negligible in higher current readings and the percentage of error would be low. In lower amperage circuitry I use an inline ammeter to increase the accuracy. As an added note, my Fluke meter does the same. It zeros when the button is pushed and then begins to exhibit low readings behind the decimal point when released.Hope this helps.BG
792506
Bad connection??I haven't had this happen. Been using the gauges about 2 years now.If voltage is right around the cutoff of 4.5V I suppose it could blink on/off as the voltage hovers around that point. Gauge puts a tiny load on system so volts would drop, then without the load V would increase again over 4.5V so it would light up again, and the cycle would repeat.
1547142
I soldered a short piece of #14 solid wire to the two voltage leads and covered with heat shrink tubing. Then I put these leads under the lugs of my sub-panel(feed from my generator) to read the incoming voltage from the generator. The meter comes with a coil which is placed around the circuit wire, this generates a very small current in the coil which the meter converts to the actual amperage, therefore the coil wire is carrying very little current. I hope this helps.
530937
There's no way to measure DC current with a clamp. All DC Amp meters use Hall Sensor to measure the magnetic field of the wire, thus estimate the current. In order to make this work, you have to Zero the reading every time before use, and make true it will not pick up interference magnetic fields. For the question you asked, most likely it's because there is magnetic field around and it's converted into current readings.
1031245
No. The meter must be powered by a voltage between 4.5 - 30 VDC. It will happily measure the 52 VDC source, but you will need either a voltage regulator or a separate power source (like a battery pack) to power the meter. If you use a battery pack to power it, you will need to connect the (-) terminal of the battery to the (-) connection of the voltage source you are measuring so that they will have a common ground.
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!