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Hi everybody, can anybody tell me where to find information on the internal working of a digital multimeter, its constructive aspects and general instrumentation concerning its use? Thanks
Need a service manual/schematic for this old KONTRON digital multimeter DMM3003 Anyone can help?
How does a digital multimeter calculate Voltage , Current , Resistance. Can someone suggest a good reference.
please help me i want to know that how can we check earth and nutral with digital multimeter . please tell me where i can find a tutorial full of pictures if posiible which can tell about using digital mutimeter thanks a lot ..............:D
instr. and maintenance manual fluke 8010A_8012A read it, fluke warn to not operate the instrument with OPTION 01_NICD pack with batteries removed !
Resistors R30 and R31 on pcb 4233-1288d-b are burnt beyond recognition and need to be replaced. They conect directly to the voltage and resistance measurement terminal on my wavetek multimeter. I have searched everywhere for a wavetek dm27xt digital multimeter schematic in order to find out their sizes and types. Anyone who can help?
the current measurement is done in serial so the ideal impedance is 0ohm so logically you are shorting it connect one terminal to transformer and other to some circuit so you can measure the current consumption of that circuit
Hi Connect it ADE7753 from analog and you can measure all high volatge and current all the best Bobi
how to improve stability in 4 1/2 digital multimeter. If the design and components are of low or sub standared ones,(As found in chineese makes) nothing is possible to increase stability. Cheers
Hi. I have a ESCORT99 digital multimeter, but manufacturer company acquiring other electronic company. Therefore, by connecting to a computer required to run the software is not available anywhere.
i use pic 16f877a pleas post digilog jr the details
Hello, I'm searching the schematics of this digital multimeter. Cheers,
I want to build multimeter which can measure V,I,R,C etc.I hope to use PIC,ADC...But i have nt clear idea about how Current is measured ,how maintain autoranges..please give me some ideas,directions to do this project.
Please help me with this, this is my first engineering project....
Normally the voltage output is less than 0.6 V DC. This facilates in-cicuit resistance measurements because BJT and diodes a (silicon) are not switched on
hello friends. i want to design digital multimeter using 8051. pls help me for doing this project, i need a schematic and program. thanks in advance. :)
Hi everyone, there is a project I am doing and it requires encorporating a module of digital multimeter to measure and display electrical quantities at some points. Normally the digital multimeter has been provided with a battery head so that it can be powered by a battery, but I want to remove the battery head and power the (...)
Consider the below circuit with 28V supply and electronic load set at 5A Constant Current mode. What voltage drop would I expect when I connect a digital multimeter between A & B ? V(AB1)= V(R6)+V(R8)+V(R9) What voltage drop would I expect when I connect a digital multimeter between C & D ? V(CD1)= (...)
When a digital multimeter is used to measure the AC voltage, does it show the amplitude of voltage or peak-to-peak voltage ?
better go for micro controller design, old multi-meters used 7106 but now all are using multimeter and the parts count and the input switches can be reduce, 7106 is good for 3.5digit volt meter but for multimeter you have to add more circuits to it,
I imagine it could quite useful and fun, build your own DMM.. thanks
Hi everybody! I am designing a digital multimeter with a MAX134. My problem is that I don't want to use any mechanical switch or relay when changing the measuring function from voltage to current. any idea? thanks in advance alba800 Added after 7 minutes: SORRY.. I made a mistake writing the questi
MOSFET testing: Regards, IanP So: connect the meter negative to the MOSFET's source. This is arrowed in the drawing above which shows the most popular TO220 MOSFETs. Hold the MOSFET by the case or the tab if you wish, it doesn't matter if you touch
Hi , Everybody i want to design multimeter Ac & Dc colud any one help me in this design now i have dc design but i need circuit design for ac if you attach a circuit it will be better thanks,,,,,,,,
GAO HOS220C Handheld digital Oscilloscope Supported by stable testing equipments, which are convenient and easy to read during the complicated on-site system, is a visible necessity for all engineers. GAO HOS220C Handheld digital Oscilloscope is designed to match this kind of needs. This handheld oscilloscope has a sampling rate at 100 MS
more explainations here :
hi friends I want to make this soldering ıron but I don't how to adjust it.language of document about this iron is in Hungary unfortunately I don't know Hungary:D. can anybody help
sir 1.i have measure ac input voltage is 250 volt ac 2.i have measure ac out put voltage is 11.7 volt (by digital multimeter 9205M) 3.when we connect only a single diod to one terminal of ac out put 11.5 volt without using capacitor 1000uf 16v .DMM giving 3. somthing dc volt Added after 1 minutes: [
I would like to know if checking a digital transistor is in the same way as a bipolar transistor since the digital one has one resistor in the base an another one in the base-emitter. rgds marco
I'm measuring the voltage result of my assignment. But , i found a problem, no matter where I connect, my DMM only will appear mV result. Initially I tought that was my circuit mistake, but when i straight connect the DMM with the 12v power supply, my DMM still showed mV results with weird reading !!! How would it be like that ??? Is that mean th
Meter check of a transistor : BIPOLAR JUNCTION TRANSISTORS Transistors How to Test a Transistor | Go through this link... hope it will hwlp to you..
Data Precision Manuals from Tucker Electronics Data Precision 245 Op-Service Manual - FREE SHIPPING!: For Sale: LV12227439
Hello sir i want to know that if i have a capacitor from an old radio or any where & its in working condition but lost the value labelled on that due to atmosphere & i ve a simple digital multimeter in which i dont have option to measure capacitance directly then how could i do so ? just to find capacitance value only here . please te
Hello, Is the inut "LO" terminal of the Keithley 2000 digital meter connected to earth certainly seems to have the earth ground symbol drawn near it. ......the user manual and datasheet dont say......... Keithley 2000 digital meter datasheet: Keithley 2000 digital met
The 17B isn't true RMS. It measures the average AC voltage then assumes it was really a sine wave and corrects the answer. That's fine if the signal was a sine wave (it usually is, otherwise you would be using an oscilloscope). If the original signal was a square wave then the value measured will be incorrect. Keith
where are you? I suspect the more global brands might be more expensive then you like at this stage a digital meter is more 'accurate' but an analog can be more useful if the voltage/current is changing
how is the internal battery?
Hi my multimeter has a voltage and a mA/A plug. I am trying to find out how much instantaneous current can a homemade battery supply. How can i measure this with the digital multimeter? What procedure?
like the others said, it can not be done. The main problem I would see is that the transistor would oscillate even if you could get a reading with a multimeter--rendering that reading meaningless. If you need to test it, I would recommend making a microwave test fixture. The gate and drain would need DC blocking series capacitors and 50 ohm t
usually there is a buzzer in there somewhere - maybe a faulty buzzer
I've got the operating and service manual for the "HP1742A Oscilloscope" (including Option 001, 090, 101, 102, 580, 900, 901, 902 and 906) and the operating and service manual for the "1700 Series Option 034 digital multimeter" that can be installed on top of the scope. Unfortunately I only have it on paper. What can we do about that because I c
Hi Etrobin, I would build a diode frequency doubler with two diodes + trifilar transformer wound on a small ferrit bead/ or toroidal core, see Fig 2 of the article at (* => t). No need for tuning, it is wideband and you can use 1N4148 or similar high-speed switching diodes (or Scho
Have someone ever designed the DMM with the max134.I am now designing a DMM with the max134,now I want to control the max134 with the avr uprocessor,Can someone providing the information,I am anxiety for it!
You can test the IGBT by multimeter at the Diode test position. Emetor Collektor must be open circuit at the two direction (If you see reverse diod this is not problem). Gate Emetor must be open circuit. If you see any short circuit at the any two pin IGBT is mort. But this is not good test...
By using the positive probe of the diode test on a digital multimeter it is possible to find the base. This will tell you if it is npn or pnp. You can pin it on a breadboard with collector (10k) and base bias resistor (1m) and 2 chances one pin is the collector or the other pin is the collector as it will only conduct one way. Barrybear
A thermocouple consists of two dissimilar metals, joined together at one end, and produce a small unique voltage at a given temperature. This voltage is measured and interpreted by a thermocouple thermometer. The thermoelectric voltage resulting from the temperature difference from one end of the wire to the other is actually the sum of all the vo
I found this two devices, i.e. BCR5PM (TRIAC) & SM8JZ47 (Triode Thyristor), on a washing machine controller board. Is it possible to 'diagnose/troubleshoot' these devices by using only digital multimeter? If it's not possible, pls advise how to determine those devices are still in GOOD CONDITION? Do you think TRIAC = Triode Thyristor? Thank y
The problem is that SMPS draw non-sinusoidal current from the mains unless it has PFC (Power factor Correction). Trying to make measurements without true RMS type meter will give wrong readings
Best method is Transistor tester. You can get Beta, Vbe, Iss and so on