will this DPM measure negative voltage?
303304
No. I have one set up on the bench. Apparently it's protected against reverse polarity :-) It shows 0.0 when powered on and the sampling wire is switched (white)
2227911
Yes. I have used it to measure DC voltage to the tenth of a volt many times.
1680968
Don't think so. The negative connection for voltage and current is made at the same point in the meter. However the current from the solar panel is the same as to the battery except for the loss to power the meter which is about 15 to 20 milliampere with the display on. Just hook it across the battery and subtract the 20 milliamperes.
1479499
With a standard 12v DC adapter. Look on the PCB and you will see a + and - sign indicating the polarity.
1755601
Yes, you need to use a volt meter to find the positive and negative side of the battery.
2198658
No, this produces no negative voltage. The "-" terminal is marked to indicate what you would normally refer to as DC ground
1375317
There is no metal probe on the end in the sense that a DMM uses test leads with metal probe tips. This sensor works on the principle of a capacitive voltage divider. See Fluke's Web page. http://www.fluke.com/Fluke/usen/community/fluke-news-plus/ArticleCategories/Electrical/CapacitiveVoltage.htm Basically, all you need to do is have the plastic end of the probe near a conductor and if the LED in the sensor comes on you will know the line is live. This sensor will not work for DC and should not be used around high voltage AC circuits.
467189
You might be disappointed. Meter can measure down to 10 micro amps according to the manual.
1026574
Not sure off top of my head. Normally I use a voltmeter to check these things. Properly designed circuits will have a blocking diode to prevent polarity reversal issues. Those that don't, may have smoke issues!
739243
Yes it will. AC or DC. Just clamp unit around positive conductor and select proper current on meter.
685904
I just used a 12v adapter I had lying around. I cut the end off and used a multimeter to make sure the polarity was correct and hooked it to the board. Please, do be careful about the where you put the positive and negative. I remember reading on the net that this device won't protect itself from reverse polarity on the dc voltage. Meaning, the circuit board will be ruined.
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!
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.
58739
Yes. Select either up to 40A or 400A by rotary switch. Defaults to DC measurements.
652719
Not sure about that as mine is negative ground. That said, it should be ground polarity insensitive by reversing the connections.
1445237
I'm sorry, seems it doesn't. It reads out "input DC 11-30V. Output 5.0V 700mA"
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.