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.

learn more… | top users | synonyms (1)

1
vote
3answers
57 views

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

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
41 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 ...
-1
votes
0answers
37 views

laptop charger reading 14V and specs says 19.5V [closed]

I have a Laptop charger that reads output 19.5V in the specifications but when I use a multimeter to test voltage, it reads 14V, is this normal? Thank you, Matias.
0
votes
0answers
46 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
34 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
43 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
29 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
145 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
63 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
32 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
22 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
982 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
91 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
37 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
31 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
67 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
87 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 ...
1
vote
1answer
40 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
88 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
111 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
84 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
61 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
54 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
91 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
55 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
77 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
178 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
592 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
151 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
53 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
71 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
158 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
109 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
437 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 ...
1
vote
3answers
488 views

Measure voltage difference between ground and DC floating power supply lines

110/220V AC to 12V DC switching mode power supply (metal enclosed, input is 220V with separate L,N and ground.) Measured voltage difference with a multimeter between V- and V+ 12V DC as expected ...
6
votes
3answers
279 views

Ammeter time limits - how to understand them [duplicate]

On my multimeter, near the 10 A connector it says 10 A MAX 10sec EACH 15min. I usually measure currents less than 1 A so I never cared about this. Is it correct ...
0
votes
1answer
72 views

measuring load cell output by a oscilloscope

Is it possible to read a load cell output (0~10mV with 10nV steps) by a oscilloscope? or I should buy an extra high precision Multimeter to read the load cell output?
1
vote
1answer
94 views

Would adding an LED to a multimeter's LCD screen affect readings?

I purchased a TekPower TP4000ZC multimeter, which has no backlight for the LCD. I wish to add one myself, perhaps a single led at low current, driven directly off of the two AA batteries. I'll add a ...
14
votes
5answers
3k views

Do digital multimeters require calibration?

This article Understanding Digital Multimeter DMM Specifications / Specs mention A digital multimeter will only be able to meet its specifications when it is within a certain environment. ...
0
votes
0answers
47 views

problem with dc battery source

I have a dc 9v battery which gives 8.66 volts reading when measured by a multimeter. When I connect the battery to a breadboard, without any circuitry attached within the breadboard, the reading is ...
-1
votes
1answer
64 views

Metex multimeter constantly displaying overload

I have a Metex M-3650CR multimeter and have just replaced the fuse and the fuse it takes is a Fast Blow 2A 250V, now my problem is that the multimeter constantly displays OL (Overload) on the screen ...
10
votes
4answers
1k views

What's the hold function on a multimeter for?

All it does on my multimeter is freeze whatever value it was reading at the time. When would I need to use this?
1
vote
0answers
37 views

How to calibrate pico-ammeter votage bias?

I'm using Keithley 6487 pico-ammeter. It's strange when I turn on the machine without connecting any circuit, there exists 0.05 Volts difference between the in and out probe. So I have to add -0.05 ...
3
votes
4answers
438 views

Why is resistance increasing while I'm measuring using a multimeter?

I have two copper strips with a one-megaohm resistor between them. That makes the resistance between the two strips 1 M ohm. I am measuring resistance between two copper strips using a multimeter. ...
1
vote
1answer
147 views

resistance measurement problem with digital multimeter

I accidentally caused a short circuit with DMM common lead while measuring 220 AC voltage. then when I tried to measure resistance it gives me a reading of 3500 ohm while there is no resistor ...
0
votes
1answer
89 views

Need to isolate panel meters from each other?

I have a computer power supply I am planning to use for electronics work. I was planning to make a box with voltmeter/ammeter panel meters on each output voltage (3.3V, 5V, 12V, -12V). I have read ...
0
votes
2answers
101 views

voltage drop when using voltmeter

it's a theoretical question. is there any voltage drop when measuring a 12v battery with a multimeter(voltmeter mode)? so if we get 12 Volts reading near the battery, does this changes if we extends ...
2
votes
2answers
232 views

How much current does a typical multimeter draw to measure resistance?

Assuming it's running on a 9V battery like most multimeters are, and the setting is on MegaOhms. How much current will be drawn from the internal battery?
0
votes
0answers
46 views

Multimeter selection, what to look for?

I am trying to build a laser diode driver circuit which which should give a required output of around 1.25v and 200mA, I have been having problems with this and want to start inspecting it with a ...
5
votes
1answer
345 views

What causes inaccuracy over time on a DMM?

Here is a piece of information from a datasheet of a DMM. The accuracy rates seemed interesting for me. I wonder what causes difference in the accuracy, especially the changes after 24 hrs? Is it only ...