Single universal measurement device that can be used to measure voltage [V] and current [A] in both AC and DC, as well as resistance [Ω]. Often many other ranges are available like frequency [Hz], duty cycle [%], capacity [F], ... Most are hand held, some more expensive ones come as a bench model.

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2
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2answers
200 views

Why would you use a non-contact voltage detector if you have a multimeter?

I was reading this Fluke multimeter safety manual and I came across this sentence: ...
0
votes
0answers
47 views

Impedance measurement for open circuit not staying constant

I'm trying to measure all the impedances (Power and critical I/O Pins at a test point) of the board using multimeter. When i measure ground and ground its showing close to zero, which is fine. But for ...
1
vote
1answer
63 views

checking for 'dirty' power on a power supply using only a multimeter?

this is a follow up from http://superuser.com/a/958165/43268 It was suggested that i check a 19VDC power supply for "dirty" voltage. If i had a oscilloscope i could probably follow the excellently ...
10
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3answers
1k views

“Beep” when testing VCC and GND with the multimeter

Sometimes I use my multimeter solely for testing if there is a contact between two points. However, sometimes, when I measure between VCC and GND on some of my PCBs, I hear a short "Beep" and then it ...
0
votes
3answers
55 views

How to measure temporary drop in voltage with meter

What's the easiest way to measure the period of time between the "peaks" when a 5V DC signal goes from high to low to high? I'm trying to debug a power-loss problem, and one of the solutions I'm ...
1
vote
1answer
46 views

Multimeter giving wrong current readings

I just got my first multimeter (TekPower TP8268) and I've been try to test it out, but I have been getting some strange readings with the current measurement. I have an AC adaptor to DC 12v and 5A. ...
0
votes
2answers
32 views

Measuring low voltage AC current with a multimeter

I know that with DC you can measure current by putting your meter in series with the positive supply. I have a project running off a low voltage AC supply. Can I do the same?
6
votes
4answers
453 views

Multimeter measurement

Looking for help with reading my multimeter. I would think by moving from 20 to 200, the decimal place would just shift one place. Why when I switch do I get a reading of 20ma vs 10ma?
0
votes
1answer
51 views

microcontroller short circuit test

Is there any way to test a microcontroller for short-circuit without an oscilloscope maybe using a multimeter? Mine is not overheating, but I cannot register any activity showing it is working. I ...
0
votes
1answer
64 views

Testing Amps And Resistance On PC Case Fan

Context: I'm wanting to tinker around with some mini solar panels to power some old PC case fans I have laying around. I know that case fans are generally 12v so I was thinking of running some 3v ...
2
votes
1answer
136 views

Have I broken my Multimeter?

Firstly, I'll answer my own question by saying that I don't think I have broken it. However, is it possible I could have? (and also possibly, the power supply I was testing). I am quite new to ...
0
votes
3answers
157 views

confusing current readings

I know that Ohm's Law is V = IR but I am getting some very confusing current readings from multiple multimeters. Here is my very basic breadboard configuration: V = 6v R = 200 Ohms I = Should ...
1
vote
4answers
108 views

Explantation for fried charger with Multimeter

I have a 9v AC to DC wall adapter that I use to power my Arduino boards. The label says it gives 9v at 1000ma but I wanted to test the validity of the label to troubleshoot. When I connected my ...
0
votes
3answers
77 views

How use DMM thermocouple probe hands-free to monitor heatsink temperature?

I suppose this is more of a lab practice question than electronics per se, but I wonder if there's a standard-ish way to mount the K-type thermocouple that comes with my Fluke DMM so I can monitor the ...
0
votes
1answer
74 views

Multimeter showing negative voltage on servo connection

I am trying too get my first (ever) servo sweeping back and forth and for some reason am having enormous difficulty with the wiring. In the Fritzing pic below, I have the circuit connected (both + ...
0
votes
1answer
38 views

Measuring sinusoidal frequency using the common LC100-A LC meter [closed]

So I need a Frequency meter for sinusoidal signals. I happen to have this common LC100-A L/C meter that is quite good for a very good range and quite cheap as well. Assuming it does so by ...
0
votes
3answers
88 views

multimeter working [closed]

I am a newbie here, and don't know much about electricity. Well, I have a digital multimeter DT830B, and I suspect it is damaged. I think sometime ago I tried to measure something wrongly, and maybe ...
1
vote
2answers
85 views

How would I monitor I/O on multiple circuits at the same time? [closed]

I've got a device that communicates over a 8 wire cable. I'd like to examine the signals going into and out of the device without having to test each line individually with my multimeter. Is there a ...
0
votes
2answers
56 views

nichrome alternatives

I am repairing an AVO multiminor Mk 4 which was in a sort circuit across a car battery while in the 1 amp measuring position. circuit diagram here an obvious casualty was the 0.25 ohm resistance R1 ...
0
votes
0answers
81 views

Measure frequency of a 555 timer with multimeter

My multimeter has a frequency option so as the manual says I connect the COM and V, the thing is I have no idea where to connect the leads to my 555 timer circuit so that I can measure it's output ...
1
vote
1answer
62 views

Fuse rating and safety

Under what conditions would a faster, higher rupture capacity, higher voltage-rated fuse be less safe than the equivalently current-rated fuse which was slower, lower rupture capacity or lower ...
3
votes
1answer
60 views

Multimeter battery test

I have a multimeter with a battery test setting in addition to voltage measurement. This is marked 1.5-6V 50 ohm. I have some questions: is the only difference between the voltage and battery tester ...
1
vote
2answers
60 views

Test Battery Volts applying load

Why we need to apply a load to a battery to test its voltage? I've been testing battery capacity so far using a multimeter and just hooking the probes in the positive and negative side of the ...
0
votes
3answers
160 views

Current decreases while reading

I'm a bit confused about reading current on a breadboard using a multimeter (I'm a complete beginner with electronics). I'm using a self-powered breadboard which should deliver 5V / 1A. Multimeter is ...
0
votes
2answers
88 views

Figuring out battery life from amp draw?

I decided to take apart one of those cheap handheld fans. It takes 2AA Alkaline batteries. I wanted to hook it up to an arduino as a way to get into electronics, and I wanted to know what kind of ...
0
votes
2answers
34 views

reading capacitance on digital meter

So I bought this digital meter from radioshack because it tests capacitance. I have several caps on a TV power board, most of which are 47uf and 470uf with various voltages. when I check with the ...
0
votes
1answer
32 views

ADG608 multiplexer acting really strange in Multisim

I am trying to use the circuit below to switch between multiple resistors using a multiplexer. Initially I had different values of resistors attached to every channel, but since I was getting very ...
5
votes
6answers
2k views

How to calculate the maximum current a AA battery can deliver for a short period of time?

I want to measure the maximum current a AA battery (full charged) can deliver for a short period of time (let's say one second) I have in mind to do this with a multimeter : setup multimeter to ...
1
vote
1answer
125 views

What's the dwell signals?

Today When I was seeing this page(Digital multimeters (DMM or DVOM) part) I saw this part: What does "automotive timing"? and What's the dwell signals? are these electronic concepts?
0
votes
1answer
44 views

What's the usage of storing recorded measurements of multimeter and soldering iron station in computer?

Assume you want to purchase a multimeter for your job. some multimeters have a USB interface to store the recorded measurements in the computer and for this feature, you have to pay more money. but ...
0
votes
1answer
35 views

Measure the current draw of a motor with a slow multimeter?

I have a motor that is in a printer housing (inkjet - the one that moves the head back and forth). The motor is attached to the printer head assembly. I want to measure the current draw of the motor, ...
1
vote
1answer
226 views

Measure inductor coil's resistance using multimeter

simulate this circuit – Schematic created using CircuitLab Above is the set-up of my simple experiment to determine the inductance of an inductor. The voltage across resistor R (5 ohms) ...
1
vote
2answers
192 views

How to measure current with an analog multimeter? [closed]

I need measuring the current through a dc motor with an analog multimeter, but I don't know how to select the correct function to that. The meter is a FT-360TR. I know it can measure currents of ...
2
votes
1answer
52 views

Power a multimeter from a 9V adaptor [closed]

my new UNI-T multimeter just arrived but unfortunately i dont have a 9V battery to power it, however im having a 9V wall adaptror which im using as a power supply for my arduino (with a 5V regulator). ...
0
votes
1answer
260 views

How to test for live wire in a car using an analog multimeter?

Let's say I cut my headlight harness off. Inside the wire loom, there are three orange wires, like this: I know one of them is for low beam, one for high beam and one for ground. I have an analog ...
1
vote
2answers
157 views

What Language should I use for automated testing? [closed]

I'm the Lab Manager for a small company in the RF industry and I've recently been asked by our engineer to find a more "up-to-date" programming option for automating my bench testing/calibration ...
0
votes
4answers
90 views

Am I reading my multimeter correctly?

I'm trying to wrap my head around the 20m and the 2000µ setting. On 20m I see 0.01 but on the 2000µ setting I see 005. Does this mean my circuit is using 5µA of current? Why the discrepancy?
1
vote
1answer
172 views

What is the equivalent of a beep on a multimeter without a beeping function?

I have a multimeter that does not have a beeping fucntion and I need to test for continuity. Set to 200 Ω, the multimeter shows 1 when the probes aren't touching, ...
1
vote
1answer
57 views

How to measure the accuracy of a digital multimeter when we don't have its datasheet?

Is it possible to measure the accuracy of a measured value by a digital multimeter without referring to its datasheet?
0
votes
4answers
95 views

Using a multimeter

Online I've seen more simpler multimeters that you choose what your measuring. How do I use a multimeter like this for measurement
0
votes
0answers
88 views

Interfacıng Matlab with Agilent 34410A Multimeter

I have a agilent 34410A multimeter which I want to connect with my matlab program through TCP/IP. In youtube there is several videos It seems to be easy but I could not able to connect the 34410A with ...
0
votes
1answer
120 views

What resistance should I expect when testing capacitors?

I'm trying to troubleshoot why my TV isn't turning on and was advised that it might be an issue with a capacitor. There are no visible signs of bursting or leaking on any of them so I've started ...
0
votes
5answers
227 views

How measure the voltage over a large resistance?

I know initially this question might come across stupid and obvious but all is not as it seems. I want to measure the voltage drop over a 10M ohm resistor but my voltmeter's probes have an ...
1
vote
2answers
653 views

Multimeter into wall sockets

If you placed one of the multimeter's probes into the hot slot of the wall outlet and touched the other probe to your skin while grounded, for example to some dirt outside, would you get bitten by the ...
1
vote
1answer
181 views

Why is this multimeter power supply short circuit when off

I have just been following some traces around inside an old digital multimeter (AVO DA116). I was poking around at the LCD driver chips (MC14543CP) when I noticed that the power supply was short ...
0
votes
1answer
57 views

power supply multimeter voltage test differ from the label

I have a router's power supply. 12 Volts is written on the label. When I use a multimeter the voltage is 16.80V. Should I use it to power a small LED strip that requires 12V?
2
votes
2answers
73 views

How do I calculate the frequency accuracy of a Fluke DMM?

I have a Fluke 8846A and I want to make a frequency measurement with an error less than 1 mHz. I'm having trouble interpreting the manual as to calculate the error of a 120V 60Hz measurement. ...
0
votes
2answers
250 views

Can a digital multimeter damage a powered circuit when measuring resistance?

I wanted to make sure my ESD wrist-strap is in working order. So I tested like this: Connected the wrist-strap to household ground (via wall socket). Measured the resistance between the wrist-strap ...
1
vote
2answers
139 views

New multimeter probes don't fit my multimeter

This seems like a silly question, but my research is failing to yield results... I ordered some new probes for my multimeter because I needed things like alligator clip leads and the little wire ...
2
votes
3answers
913 views

How does a flame sensor or thermocouple operate with just one wire?

I am learning electronics and I just got stumped. I was just looking at a flame sensor and it appears to have only has one connector. I thought sensors in general need two wires to form a complete ...