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Questions tagged [multimeter]

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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1answer
70 views

Adapter for drum module showing incorrect values?

I have bought this electronic drumkit by Roland about a year ago. It was second hand. It came with a 230v ac to 9 v dc 1000ma adapter. On the drum module, a few types of compatible adapters are ...
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2answers
94 views

How connect ammeter from ebay [closed]

sorry for stupid question but I do need help with connect of my ammeter from ebay. I bought this Ammeter 0-50A but there is no connection diagram So I try: connect Vcc and GND to 9V and display turn ...
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1answer
55 views

Inductance read can't read one special coil

Some time ago I winded a high voltage coil. It used to measure 2.55 kohms. Today I finished another one, 2.76 kohms, 210 more ohms. The first one my multimeter reads as 12 point something Henry. The ...
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1answer
249 views

How to debug an I2C Sensor conntected to a raspberry pi with a multimeter?

I am a noob in eletronics, so I need some help. I want to debug an i2c sensor with a digital multimeter such like this: And I have a setting like in the picture below where tmp102 is my i2c sensor on ...
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2answers
77 views

Replacing the fast tube fuse with polymer fuse

I have a simple digital multimeter in which a fast tube fuse, rated at 0.1A and 250V is soldered directly to the plate. Now, recently this fuse blowed and I have to replace it. Because I don't want ...
3
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1answer
84 views

Something strange with my multitester

I have a multi-tester. And its model name is J0411A. And it looks like thisYou might see that this multi-tester includes a resistor tester. When I set the tester to x1 of Ohm section and connect + to -...
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1answer
857 views

Reading values on continuity test but there is no beep

When checking traces of my PCB I realized that checking continuity between one of the output trace and GND some values appear on multimeter screen but the buzzer does not beep. On the Vcc trace ...
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2answers
389 views

Use multimeter to find approximate impedance of miswired speaker array?

I visit my father's house a few times each year. When he built the place, he had it wired for sound using in-wall systems, but (it seems) not by professionals. He blew out a receiver/amp, so I asked ...
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4answers
200 views

How to interpret an ammeter?

I would like to interpret my ammeter. I don't understand what the point with the numbers 2,20,200 means and what is the exact current I am measuring. Thanks
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2answers
284 views

Is it possible to test a MIDI device through its connector with a multimeter?

I have a Fluke 115 multimeter available that I'm hoping has capabilities to register (even with low fidelity) any MIDI signals flowing out of a handful of devices. ...
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1answer
145 views

Meter fuse availability/substitution conundrum

I own a Brymen BM235 multimeter, among other test instruments. While it's a nice multimeter, I have one problem with it: the fuse for the mA jack is a Siba 7017240.0,4, and nobody even bothers with ...
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3answers
160 views

Measure current with a Branford Multimeter

I have a cheap multimeter called "Branford" and I would like to measure the current used to charge a phone. As a power supply, I use a DC generator, which I rotate by hand. Then I have a DC/DC Step ...
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2answers
157 views

Why is 1699 displayed when cheap multimeter is loading? [closed]

I'm talking about like this: Why do we see 1699 the first second after we turn it to measure 750V~? Is there some electrical logic behind this number, is this related to the chip used in the ...
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0answers
154 views

What to use instead of 1k1 Ohm PTC thermistor?

I've got uni-t ut60a damaged. IC was replaced. Two tracks were repaired. The PTC thermistor of 1k1 Ohm is left. Unfortunately it is not easily available, in fact I couldn't find any of these being ...
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3answers
5k views

How does a DC clamp meter measure current?

I understand that for AC clamp meters, a changing magnetic field induces a voltage/current in a wire loop and therefore it is possible to measure AC currents by induction. But how does a DC clamp ...
4
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1answer
141 views

Odd millivolt readings on UT61E multimeter

I've just bought a Uni-T UT61E multimeter. The purpose of the purchase was to measure voltage in the uV-mV area. When I start the multimeter (without even attaching the probes) it outputs random ...
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2answers
149 views

What ohms reading will be 10U 25V Capacitor [closed]

I am noobi in soldering and don't have much knowledge to identify components, i have a lot of Capacitors and resisters, now i want to know if i need 10U 25V Capacitor from what i have stock than how i ...
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0answers
150 views

MQ2 sensor VCC and GND continuity

If I use a multimeter on continuity mode and test my MQ2 sensor between the 5V and GND pins, I hear a beep. Is this normal behavior? If I set it to resistance, I get a reading of 40 ohms between the ...
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3answers
117 views

Measuring a 9volt battery with a D.Multimeter

I try to measure a 9volt battery and it displays "9.14V". But the battery is empty. What is happening? Does the multimeter measures it's own 9V battery? Can someone explain to me what i observe? How ...
0
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1answer
586 views

Digital Multimeter not working on higher frequency

I have an ordinary multi-meter which looks like the one below in the description. When i measure higher frequencies above 200kHZ the voltage is not showing up properly as it says on the frequency ...
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5answers
2k views

Retrieving data from Agilent 34401A Digital Multimeter over the RS232 interface

I want to interface Agilent 34401A Digital Multimeter over the RS232 interface. The settings (baud rate, parity, number of start and stop bits) are set to be same on multimeter, pc (device manager) ...
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2answers
30 views

Transmitter max output when checking ohms in parallel

To make my question simple and easy to understand I am giving an example below. I have an RTD (platinum 100) which change resistance with increase in temperature, for checking that rtd is showing ...
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1answer
38 views

How to Capture Momentary Current Reading on a Multi-meter

I am attempting a circuit design that involves connecting to a DLSR camera PC port. Newer digital cameras deliver very small amounts of current (mA) to their PC port during shutter release. This ...
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2answers
485 views

Measuring high voltage low current using a resistor and measuring the amps

Is it possible to measure a voltage beyond what your multimeter is capable of measuring by measuring the amps providing you know the resistance? Just wondering if the voltage would still harm the ...
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1answer
959 views

New multimeter always shows a resistance of 1

I'm having the same problem as this person - no matter the setting, my multimeter always shows a resistance of 1. I tried touching the probes together - still 1. Is my multimeter faulty? Or am I ...
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0answers
77 views

DT830B malfunction

I had this cheap multimeter (DT830B) laying around for some time, until its battery drop dead. After i changed the battery for a new one, then things got weird. The first test i did with it after i ...
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2answers
128 views

How does measuring amps on a multimeter work?

When I measure the amperage coming from two AA batteries to an LED, these are my results: ...
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2answers
1k views

How to check if there is electric current on material surface?

If there is electric current on a material surface (but not an obvious thing like outlet hole or such), what is the best tool to check it ? Is it possible to use multimeter? Example case: There is a ...
8
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5answers
3k views

When we should use only an “Analog” multimeter?

I know electronics testing with digital multimeters is easier than analog, but I'm wondering whether there is any electronic testing which can done with only "Analog" multimeters? For example ...
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2answers
85 views

Questions about clamp meters

Are clamp meters as accurate as multimeters? Could I replace a multimeter with a clamp meter? What can clamp meters do that multimeters can't? What can multimeters do that clamp meters cant?
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2answers
71 views

Difference between using large vs small test resistance to check internal DMM/SCOPE resistance

For my intro lab to my Analog Electric Circuits class, one of the analysis questions is to calculate the internal resistances of the digital voltmeter and the oscilloscope, using the equation The ...
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1answer
361 views

multimeter input impedance calculation discrepancies

To measure the input impedance of a multimeter, I have built a voltage divider circuit with equal resistances R1 and R2 and measured the voltage across one of them using the multimeter. Considering ...
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1answer
588 views

What is a 4-wire voltage measurement?

I am working with a Fluke 8508A, an 8.5-digit table-top multimeter. To my surprise, one of the menu options is a 4-wire DC voltage measurement. I know how 4-wire resistance measurements work, but I ...
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1answer
137 views

Measuring voltage 10 times every second with HP 34401A DMM

I'm trying to measure voltage continuously for a short time using the HP 34401A digital multimeter. To do this I have connected the DMM to my PC via RS-232. The PC is running Windows 10 and I use ...
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2answers
879 views

How to determine a current is AC or DC by use of analog multimeter?

How can one determine a current is AC or DC by use of an analog multimeter? Or its workaround with rudimentary tools or equipment ?
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0answers
265 views

Is it possible to test capacitors on a logic board?

First, I would like to know if it is possible to test a capacitor while it is soldered to a logic board, or does it have to be unsoldered first? Second, is it possible to do so with a multimeter? ...
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1answer
210 views

Innova 3320 multimeter calibration

Anyone have experience adjusting the Voltage reading on these? My less expensive meters have a single pot for calibrating, but this one has three. Labeled on the circuit board as V1, V2, and V3. I'd ...
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2answers
98 views

Multimeter Measurement Problem About Capacitor

When i am trying to measure a 100 nF capacitor using multimeter, the value which device shows continuously increasing. Do you have an idea about the reason of this situation? Thank you. I have ...
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2answers
227 views

Is there any analog meter with the needle capable of a full revolution?

Is there any analog meter with the needle capable of a full revolution? I have always seen only instruments where the needle can rotate only a fraction of 360 degrees, for example in the following ...
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0answers
1k views

How to test a schottky diode with a multimeter

I am trying to fix the backlight on an lcd monitor, I get the "2 seconds to black", the monitor is dell 23", and the inverter in built it the power board. I know caps are most of the time the ones to ...
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0answers
59 views

Multimeter shows 4.3V AC AND DC

Today I wanted o repair my door's buzzer system. After removing the front, there were a number of cables protruding from the wall. Pretty old building, so there was no clear color coding of the cables....
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2answers
423 views

Diode the wrong way [duplicate]

What will happen to the current if a diode is placed the wrong way round? Should the current be 0? I need to measure the current when the diode is the wrong way round. Thanks
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2answers
66 views

Measuring current through

I am new to this site. I have a circuit and need to measure the current through a diode. In my circuit i have a resistor and then a diode. Do i connect the multi meter where i have in the picture? ...
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2answers
1k views

Mesuring amperage in car battery system

I recently bought a van that has a starting and an auxillary battery, who ever installed it didn't isolate it from the starting battery. I'm planning on installing a simple switch to isolate it, but I ...
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1answer
76 views

I need the explanation on a DMM instruction manual

It's HIOKI DT4211 digital MM In Electrical Characteristics section it states: Rated power voltage: 1.5 v DC x2, use LR6 AA Alkaline battery 2x 1.5v But then... in Accuracy Table section, it states: ...
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4answers
6k views

testing wire polarity with a multimeter [closed]

I have a power cord that is supposed to supply an appliance with 12V D/C power. The power cord has positive and negative leads. One lead has the typical writing on it which could identify it as the ...
4
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1answer
3k views

Can anyone identify this circut?

The left side are the test leads to poke around on something on a vehicle. I for the life of me cannot remember what this was used for. I do know 100% that it is used to test something on the ...
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1answer
191 views

C3229 transistor testing

I have tried to search through existing questions to find an answer to my question, but so far have had no luck. I apologize (and feel free to flag) if this is a dupe. I am working on repairing an ...
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0answers
41 views

Mulimeter Ripple Current Error

I have two multimeters. One is very good, the other one is quite cheap. I am measuring a regulated power supply to see if it is in indeed regulated. Both so 5.4 V, unloaded and loaded. This seems to ...
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1answer
101 views

Can a modern multimeter be classified as a discrete component tester?

I work for an avionics training company where we are required to meet certain criteria with respect to the theory and practical tasks that we teach. At the moment there is one area of debate with ...