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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3answers
136 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
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2answers
58 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
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2answers
30 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
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1answer
15 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
850 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
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1answer
85 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?
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1answer
36 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 ...
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1answer
30 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
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1answer
52 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
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2answers
80 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
38 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
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1answer
56 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
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2answers
105 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
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4answers
81 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
49 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
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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?
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4answers
90 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
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0answers
41 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
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1answer
66 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
167 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
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2answers
579 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
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1answer
138 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
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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
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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. ...
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2answers
136 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
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2answers
108 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
323 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
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3answers
339 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
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3answers
272 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
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1answer
62 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
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1answer
86 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
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5answers
2k 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
46 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 ...
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votes
1answer
62 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
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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?
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0answers
35 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
412 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
139 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
84 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
97 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
210 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?
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0answers
45 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
341 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 ...
1
vote
2answers
321 views

How to measure current practically in a circuit

I have to measure this circuit, I have done the theoretical calculations using Kirchhoff's 2nd law, but I'm having troubles in measuring the current in each part of the circuit: I have to measure ...
1
vote
2answers
77 views

Amperage measurements using a analog multimeter

I got this $15.00 Multimeter with Amperage measurement. Do I need to put the test probes in series on the circuit? The maximum range on the multimeter is 250mA. The black probe is connected to the 10A ...
0
votes
1answer
238 views

Digital Multimeter to RS232 Serial Port or USB - DT830D

I am new to Electronics and doing a hobby project. I want to take some readings and get them on the computer/laptop. I am ok with both RS232 (Serial) or USB (preferred). I have a DT830D Multimeter. I ...
1
vote
3answers
147 views

Automatically measure voltage over a wide range

There are voltmeters that can measure voltage over a wide range without the need to switch the range manually. I'm quite curious how do they do it, because I'd like to make a tiny device capable of ...
0
votes
1answer
94 views

How does a multimeter sense whether it is measuring single or 3 phase voltages?

How does a multimeter sense whether the voltage we are measuring is single phase or three phase? It might be simple but I have no idea so please help me.
1
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2answers
778 views

Arduino clamp ammeter

I am using an Arduino Uno as a watch dog for a project I a doing; its job is to monitor what is happening in the system and shut down the system if it is not operating within spec. One of the ...
3
votes
2answers
267 views

Measuring current with multimeter (broken?)

I just got my first multimeter from Home Depot and it was $60. It's the Extech EX330 and it works fine except for when I measure current. I am doing it correctly and the fuse has not been blown. When ...