Here we are using two switches namely S 1 and S 2 to select the desired meter. This IC contains a dual slope AD converter display latches decoder and the display driver. We may use additional range-selector switches to choose particular range required in reading amperes volts and ohms.
How To Use Analog Multimeter Bangla Multimeter Analog Electronics Components
We use a rectifier to measure an AC voltage or current with the multimeter.
This work is on an analogue multimeter.
A multimeter is a tool basically used to measure current voltage and resistance. An analog multimeter is the most commonly used instrument by technicians and engineers in the laboratory as well as other repair works. 31 BLOCK DIAGRAM OF THE SYSTEM 32 CIRCUIT DIAGRAM 33 CIRCUIT OPERATION AND. When such a meter is connected in the circuit to measure voltage it will draw negligible current thus will measure the correct voltage.
The sensitivity of a multimeter varies from 8k ohm per volt to 20k ohm per volt.
Thanks for reading about the analog multimeter working principle. Block Diagram Working Principle and Construction of Digital Multimeter in Digital Instruments Video Lecture of Analog and Digital Instruments Chapter in Sub. SCHEMATIC DIAGRAM ILLUSTRATION. First you need to determine the characteristics of your meter movement.
Most important is to know the full-scale deflection in milliamps or microamps.
To determine this connect the meter movement a potentiometer battery and digital ammeter in series. Multimeter is a measuring instrument. It can be used to measure voltage current and resistance. An analog meter Figure a moves a needle along a scale.
The function of the meter can be changed by switching the dial.
Analog multimeter shown in the figure is cheap but difficult for beginners to read accurately. Most modern multimeters are digital. Analog multimeters work based on the deflection of a needle from its zero position point. During a measurement one needs to read the correct value just under the needle.
The main part of an analog meter is a galvanometer that consists of a small winding.
The winding can rotate about a pin and a needle is attached to it. The following figure represents the digital multimeter block diagram with all the functional blocks. Digital Multimeter Block Diagram The auto-ranging digital multimeter DMM only requires you to choose your electrical quantity you are attempting to measure make sure you are properly placing your leads into the correct terminals and. Analog Discovery 2 pinout diagram.
1 Architectural Overview and Block Diagram Analog Discovery 2s high-level block diagram is presented in Fig.
The core of the Analog Discovery 2 is the Xilinx Spartan-6 FPGA specifically the XC6SLX16-1L device. The WaveForms application automatically. Block diagram of analog multimeter electronic circuit schematics. Glossary of key terminology used in printed circuit board.
Connect analog output signals to a daq device national.
Multimeter clock simpson 260 alan parekhs electronic. Calibrate ohms on an analog meter. Analog meters have an additional dial used to adjust the resistance scale and typically marked with an Ω. Before making a resistance measurement connect the two probe ends to each other.
Turn the dial until the ohm scale reads zero to calibrate it then conduct your actual test.
An AVO Mk 8 Analogue Multimeter dB scales and ranges. Some analogue multimeters will have a dB scale on them. The analogue meter is not a power meter and it also cannot directly compare readings to provide a ratio. The readings are typically used for looking at the standard line audio signals and the decibel readings are relative to 1mW into 600Ω.
Block Diagram of ADC The analog signal is first applied to the sample block where it is sampled at a specific sampling frequency.
The sample amplitude value is maintained and held in the hold block. It is an analog value. Working Principle of Digital Multimeter. As shown in the block diagram in a typical Digital multimeter the input signal ie ac or dc voltage current resistance temperature or any other parameter is converted to dc voltage within the range of the ADC.
Figure 1 shows a block diagram of a typical meter movement where a moving coil is deflected against a set of calibrated springs within the magnetic field of a permanent magnet when a current is applied to the coil.
It should be noted that an analog meter is an electro-mechanical device and will display an average reading. As we can see the block diagram consists of attenuator with an analogue to digital converter after it. This ADC unit basically distinguishes between various types of Digital Voltmeters which we will discuss later. A counter section is also employed in the circuitry that is usually a decade counter.
A multimeter or a multitester also known as a VOM volt-ohm-milliammeter is an electronic measuring instrument that combines several measurement functions in one unit.
A typical multimeter can measure voltage current and resistance. Analog multimeters use a microammeter with a moving pointer to display readings. Digital multimeters DMM DVOM have a numeric display and may also show a. Access a multimeter is very handy at measuring resistance.
Pick out a random resistor and set the multimeter to the 20kΩ setting.
Then hold the probes against the resistor legs with the same amount of pressure you when pressing a key on a keyboard. The meter will read one of three things000 1 or the actual resistor value. Analog Data V Ω VAC VACmA AC mA mA COMM VΩ V Figure 1 Simplified Block Diagram THEORY OF OPERATION A block diagram of the M-2666K is shown in Figure 1. Operation centers around a custom LSI chip.
