PARTS OF THE ANALOG MULTITESTER Pointer or Needle indicates the values read from the scale Scale shows the value of what is being measured DialInfinity Knob points the needle to the 0 at the left side of the scale. More advanced models can measure capacitance inductance and temperature. How To Use Analog Multitester Multimeter or which is often referred to as AVO Ampere Voltase Ohm meter is a tool that serves to measure electrical devices about the electric current voltage and resistance resistance in the unit that has been set.
Types Of Multimeter Working Probes Advantages Disadvantages Electrical Engineering Technology Electronics Basics Multimeter
In using multimeter we must know what units will be measured.
The heart of an analog multimeter is its electromechanical display called a DArsonval movement.
Its design uses a permanent magnet a wire coil on a spring and a needle. When electric current flows through the coil it creates a magnetic field. More current produces a stronger field. Analogue multimeters are test instruments that are able to measure the basic electrical and electronic quantities of voltage current and resistance.
Range knobs to switch between various ranges usually powers of 10 in each of the three areas of Voltage Current and Resistance.
A movable needle tracing over a printed legend with. POINTER The needle-shape rod that moves over the scale of a meter. It is mechanically connected to the moving coil. It indicates the measured values on the multimeter.
RANGE SELECTOR KNOB - selector switch makes it possible to select different function and range of the meter.
Operation of a Multimeter A multimeter is not just a single device. It is a combination of a multi-range DC voltmeter multi-range AC voltmeter multi-range ammeter and multi-range ohmmeter. Its packed to the brim with all the necessary parts of this configuration. The pointer or needle- use to point or read the measurement using the meter scale base of the range and settings you prepared during the test of a device or line of a voltage.
Meter scales- this is the basis of the measurement where the graduation bar drawn in the body commonly the resistance or ohms scale have a measurement from 0-2k ohms depend of the range and settings.
- Simpson Electric Model 260 Series 8 XPI Analog Multi-meter Volt - Ohm Yellow. Vintage Lafayette Analog Multi Meter Tester 99-5076. - Vintage Lafayette Analog Multi Meter Tester 99-5076. Simpson 260 Series 7 Volt Ohm Meter Series 7 With Leads - Not Tested.
Multimeters measure the voltage resistance and current of a wiring circuit.
Homeowners can use this tool to test batteries check extension cords and determine why a certain light switch isnt working. 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.
Switched range analog multimeters are very cheap but are difficult for beginners to read accurately especially on resistance scales.
Each type of meter has its advantages. Used as a voltmeter a digital meter is usually better because its resistance is much higher 1 M or 10 M compared to 200 for a analog multimeter on a similar range. Digital Multimeter Verses Analog VOMs. For appliance and electronic repairs buy a digital not analog multimeter.
Learning how to use a digital multimeter is much simpler to read and you can change the functions on it more easily.
Digital multimeters Photo 2 have LCD readouts and do continuity testing. Consider a digital meter instead of the older analog types. Digital meters usually offer automatic ranging and easy to read displays. Since they are electronic the built-in software helps them withstand incorrect connection and ranges better than the mechanical meter movement in analog types.
A multimeter is has three parts.
Display Selection Knob Ports The display usually has four digits and the ability to display a negative sign. A few multimeters have illuminated displays for better viewing in low light situations. The selection knob allows the user to set the multimeter to read different things such as milliamps. The VOM multimeter has four functions.
DCV ACV W and DCMA as indicated by the four circular brackets around the large selector switch in the Iower center of the meter.
Within each function a number of ranges are available. The multimeter has multi functionalities like acts like ammeter voltmeter and ohmmeter. It is a handheld device with positive and negative indicator needle over a numeric LCD digital display. Multimeters can be used for testing batteries household wiring electric motors and power supplies.
A basic multimeter measures resistance voltage and current.
