POINTER- The needle-shape rod that moves over the scale of a meter. For resistance measurements a small constant current is usually passed through the device being tested and the digital multimeter reads the resultant voltage drop. - It is mechanically connected to the moving coil.
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It indicates the measured values on the multimeter.
2 RANGE SELECTOR KNOB- selector switch makes it possible to select different function and range of the meter.
ANALOG MULTITESTER although older than the commonly preferred digital multimeter do come with several unique advantages. Although both digital and analog multimeters measure varying units such as voltage current and resistance they display their readings in distinctly different ways. PARTS OF MULTITESTER 1. 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.
Discuss the operation of a dArsonval meter movement.
Connect a voltmeter to a circuit. Read an analog multimeter. Measure resistance using an ohmmeter. Unit 9 Measuring Instruments Analog meters are characterized by the fact that they use a pointer and scale to indicate their value.
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. Analog Meter Precautions Do not Jar manhandle drop or pile tools or any thing else on your meter. In both of these precautions you do not want to jar the needle from it jeweled pivot.
Do not place your multimeter in a place where you may accidentally knock it over or pull it to the floor.
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. PowToon is a free. G0009 Laboratory Exercise 2 Breadboard and Analog Multimeter Familiarization OBJECTIVES.
At the end of the exercise the students should be able to.
Identify the characteristics of breadboard demonstrate proper connection of circuit elements on a breadboard identify the different parts of analog multimeter and demonstrate how to use an analog multimeter. 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.
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 meter in series with the circuit andor component.
This is not a Auto-ranging Digital. Function switch at a high level and decrease to a lower level. It is still a good idea to try to read the value about mid scale or mid range on the meter. This is the circuit without the meter.
Analog Multimeter Measuring Current.
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This instrument includes two leads or probes namely red and black three ports.
The black color lead is used to plug into the common port whereas the red color leads plugs into other ports based on the requirement. Analog Multimeter Parts And Their Functions For electricians the electrical technician must have understood correctly about the parts in the multimeter tool. However for beginners who are not yet familiar with the multimeter component little will be explained about the parts of the multimeter that are mandatory to know. And those sections are.
An analog multimeter measures voltage in four or five ranges.
As with resistance you select the appropriate range by turning the function knob. The meter measures alternating current AC and direct current DC voltages in separate ranges so if you measure voltage you need to know if the source is AC or DC. Analog Multimeter Function Like their digital counterparts analog multimeters can measure a range of different electrical outputs such as voltage current and resistanceas done with digital multimeters a function must be selected and a corresponding range must be set. Ive seen hundreds of analog multimeters but I have never yet seen one that measured either transistor gain or capacitance.
Better keep the meter you have for those functions.
I tried to find some info on the Protek A-423. Hmmm Meter movements rarely fail so that should not be a concern. Digital multimeters incorporate amplifiers which use the same principles as analog multimeters for resistance readings.
