Differentiate between analog and digital multimeter.

1 Answer

Answer :

Analog multimeter
Digital multimeter
1. Power supply is not required
1. Power supply is required
2. Less suffered from electric noise
2. Suffered from electric noise
3. It provides measurement in analog form with metal pointer
3. It provides measurement in digital form using digits as per resolution needed.
4. It uses simple display with markings for various ranges as per R, V and I measurements.
4. It uses LCD display.
5. It does not require ADC converter i.e. analog to digital converter
5. It requires ADC converter and quantity to be displayed is in digital form.
6. Accuracy of measurement is lower
6. Accuracy of measurement is higher
7. Input resistance vary as per range to be measured. 
7. Input resistance is constant for all ranges.
8. Simple & rugged in construction
8. Complicated & delicate in construction
9. Bigger in size
9. Compact in size
10. Economical
10.Expensive

Related questions

Description : Compare analog instrument to digital instrument on the basis of accuracy, resolution, power required and portability. 

Last Answer : Comparison between Analog instruments & Digital instruments: 

Description : Compare analog & digital multimeter.

Last Answer : Analog multi-meter DMM Power supply is not required  Power supply is required  Less suffered from electric noise  More suffered from electric Noise Less isolation problems. More ... visual indication Visual indication is not that much better. Less cost More cost

Description : State the working principle of PMMC Analog instrument.

Last Answer : Working Principal of PMMC Analog Instrument: When current carrying conductor is placed in a magnetic field, it experiences mechanical force. In PMMC instrument, when current flows through a coil ... coil rotates and pointer attached to the coil shows deflection proportional to the current magnitude.

Description : Describe different types of errors in analog measuring instruments. 

Last Answer : Types of Errors in Analog Measuring Instruments: A) Gross error: These are due to mistakes on the part of person using the instrument. B) Systematic Error: It has three sub types as ... multiplying factor. C) Random error: These persist even after gross and systematic errors are removed.

Description : Differentiate between analog and digital computers

Last Answer :  Analog computer:  Analog computers represent and process data by measuring quantities such as voltage and current to solve a problem.  They work on supply of continuous signals as input. ... memory capacity.  They are being used in business, education, health, supermarkets & banking. 

Description : Differentiate analog and digital signal.

Last Answer : Analog signals are defined for every value of time and they take on values in the continuous interval (a,b) where ‘a’ can be -∞ and ‘b’ can be ∞. Ex : x(t)=cos πt ; -∞

Description : Which of the listed statements is correct when using an analog multimeter as an ohmmeter? A. The pointer should be adjusted to zero each time a new resistance range is selected. B. The ... C. Ohmmeters are not sufficiently sized to measure conductor insulation resistance. D. All of the above.

Last Answer : Answer: D

Description : Differentiate between the following pairs: (a) Telemeter and Multimeter: (b) Perimeter and Altimeter (c) Periscope and Microscope (d) Nucleon and Photon (e) Cusec and Comet

Last Answer : (a) Telemeter and Multimeter: Telemeter is used to convey the physical statistics to a distance, while a multimeter is a complex device, having a potentiometer and ammeter. (b) Perimeter and Altimeter Perimeter is ... packet. (e) Cusec and Comet Cusec is a measure of flow, while comet is an object.

Description : Describe with block diagram the working of digital frequency meter.

Last Answer : Digital frequency meter: Amplifier: The signal whose frequency is to be measured is first amplified and supplied to the schmitt trigger. Schmitt Trigger: The schmitt trigger convert ... count displayed on counter  t = time interval between start and stop condition of the gate 

Description : Describe with block diagram; the principle of operation of digital storage oscilloscope.

Last Answer : The block diagram of DSO is shown above. Sampling rate may be as high as 1,00,000 samples per sencod. For such high sampling rates, a fast conversion ADC is requried. Flash ADC ... particular signal in the memory then overwritting should be stopped.This obtained by using Hold and Save button.

Description : A device which can be used to check the calibration of a circuit breaker is a _________________. A. 500 volt megohmmeter B. portable low voltage high current testing unit C. standard digital multimeter D. clamp-on voltmeter

Last Answer : Answer: B

Description : How is an overload condition indicated by the electronic digital multimeter?

Last Answer : Simultaneous flashing of display readouts

Description : Power for the electronic digital multimeter is normally supplied by what internal power source?

Last Answer : Rechargeable batteries.

Description : Digital version of an AVO meter is known as a) Digital Ohmmeter b) Multimeter c) Digital Multimeter d) None of these

Last Answer : c) Digital Multimeter

Description : List four applications of digital multimeter.

Last Answer : Applications : 1. It is used continuity test. 2. It is used to check diode 3. It is used to check transistor 4. It is used to measure voltage, current & resistance.

Description : what are the advantages of digital multimeter ?

Last Answer : Precise reading digital reading easy to use less losses due to no mechanical parts high efficiency small size compact can measure AC and DC voltage and current and resistance and can be use for continuity testing

Description : Digital Multimeter (DMM)

Last Answer : Digital Multimeter (DMM) Digital multimeter is the combination of Voltmeter (for measuring voltage) Ammeter (for measuring current) and Ohmmeter (for measuring resistance ... ;in the range of mega ohms.VISIT AT YOUTUBEBUY BOOKS AT EEE STORE

Description : Explain with neat sketch the construction and working principle of megger.

Last Answer : Megger: Construction of Megger : Two coils: the current coil and pressure coil are mounted at an angle on the same spindle and form the part of the moving system. These coils are ... force produces a torque that is used to deflect the pointer of the device which gives some reading.

Description : Describe the procedure for the measurement of earth resistance by using earth tester.

Last Answer : Measurement of earth resistance by using earth tester:  It is connected to earth electrode E, whose resistance is to be measured, and the other spike P and R, as shown in the ... , the deflection of the pointer will indicate directly resistance in ohm of the earth electrode under test. 

Description : Explain the calibration of single phase electronic energy meter using direct loading.

Last Answer : Calibration of Single-phase Electronic Energy Meter by Direct Loading Method: The following figure shows the arrangement of calibration for single phase electronic energy meter. A phase shifter is connected for ... are taken for different values of current at different power factors. 

Description : Draw block diagram of function generator and state the function of each block. 

Last Answer : Block Diagram of Function Generator: OR Working of Function Generator : This instrument can deliver sine, triangular & square waves with frequency range of 0.01 Hz to ... output voltage reaches a predetermined level on the negative slope of the integrator's output voltage. 

Description : Explain the effect of power factor on wattmeter reading in two wattmeter method for power measurement.

Last Answer : Effect of P.F. on Reading of Wattmeter in Two Wattmeter Method:

Description : Explain with neat sketch; the construction and working principle of Repulsion type moving iron instrument.

Last Answer : Repulsion Type Moving Iron Instrument: Construction: It consist of fixed cylinder hollow coil which carries operating current inside the coil there are two soft iron pieces. One of which is ... magnetized with same polarity a repulsive force act on them and moving iron piece gets deflected. 

Description : Draw the block diagram of tri-vector meter. State the various measurements possible from tri-vector meter.

Last Answer : Various measurements possible from tri-vector meter are: Tri-vector meter is a measuring instrument which measures the kWh, kVArh, the kVAh of a power line. Tri-vector meter is an energy meter ... of supply such as voltage, current, power factor, active load, reactive load, apparent load etc.

Description : Describe with suitable example; frequency measurement by Lissajous patterns on CRO. 

Last Answer : * Initially the unknown frequency signal is connected to vertical deflection plates of CRO. * Now switch of the internal sweep generator of the horizontal deflecting system. * A standard source ... explain by following example: Assume horizontal input frequency is 10 kHz for following pattern

Description :  Draw a neat labeled block diagram of 3-phase Electronic Energy meter.

Last Answer : Labeled diagram of 3-phase electronic energy meter:

Description : Describe with block diagram; the construction of single phase electronic energy meter. 

Last Answer : Construction of Single Phase Electronic Energy Meter: 1. CT reduces current to reasonable value for current scaling network. 2. Voltage & current scaling networks reduce proportionally the ... The ADC converts the square wave frequency analog output to display the energy in Watt-hour.

Description : Explain the error occurred due to pressure coil inductance of electrodynamometer type wattmeter. How this error is compensated?

Last Answer : For power measurement assume that the pressure coil of wattmeter is purely restitive. Hence current taken by pressure coil Ipc is in phase with voltage across the pressure coil Vpc  ... inductive reactance XL the pressure coil circuit is made purely resistive and the error is eliminated.

Description : Draw the circuit diagram for:- i) Measurement of active power in 3-phase load circuit using two wattmeter. ii) Measurement of reactive power in 3-phase load circuit using one wattmeter.

Last Answer : (i) Measurement of active power in 3- phase load circuit using two- wattmeter: (ii) Measurement of reactive power in 3- phase load circuit using one wattmeter

Description : Explain with neat sketch, the working of full wave rectifier voltmeter.

Last Answer : Full Wave Rectifier Type Voltmeter: Working of full wave rectifier type A. C. Voltmeter Referring to the circuit diagram, for rectification, a full wave bridge circuit (ABCD) is used. Input ... current passing through meter is given as, which causes full scale deflection of the meter.

Description : A permanent magnet moving coil instrument gives full scale deflection of 25mA when a voltage of 75mV is applied across it. Calculate: (i) Resistance of shunt required for full scale deflection of 150 A. (ii) Series resistance for full scale deflection of 500 V.

Last Answer : Answer :

Description : State the purpose of calibration of measuring instruments. Explain the procedure of calibration of D.C. voltmeter by using D.C. potentiometer.

Last Answer : Purpose of calibration : Calibration is the process of evaluating and adjusting the precision and accuracy of measuring equipment. Proper calibration of an instrument allows people to have a safe ... calibration curve can be drawn by plotting the percentage error against the measured voltages. 

Description : List the types of systematic errors and state the reasons due to which these errors occur.

Last Answer : Systematic Error: i) Instrumental Error: These errors are caused due to the mechanical structure of measuring instrument such as: a) Inherent shortcomings of instruments: Instrument may ... or electrostatic fields. iii) Observational Error: Parallax errors, incorrect multiplying factor.

Description : State the advantages of electronic energy meter. 

Last Answer : Advantages of Electronic Energy Meter: 1) Low cost. 2) High accuracy. 3) More flexibility. 4) High sensitivity 5) No frictional losses. 6) Less loading effect. 7) High frequency ... for external adjustment. 11) Low load, full load, power factor and creeping adjustments are not required.

Description : List the errors occuring in single phase electronic energy meter.

Last Answer : Errors in Single Phase Electronic Energy Meter: 1) Error due to wrong sensor opeartion. 2) Error due to temperature. 3) Error due to wrong CT opeartion. 4) Error due to wrong PT opeartion. 5 ... of scaling network. 6) Error due to wrong ADC opeartion. 7) Error due to wrong Display. 

Description : A single phase wattmeter rated for 500 V; 5A is having full scale deflection of 1000 watt. What is multiplying factor of the wattmeter?

Last Answer : Answer :

Description : State the purpose of four quadrant meter.

Last Answer : Purpose of four quadrant meter:  Four-quadrant meter is basically a bidirectional energy-meter with additional measurement facility. The purposes of four-quadrant meter are: 1) Measurement of energy/power ... and kVARh 3) Time-of-use metering: Bidirectional consumption and demand.

Description : Calculate the resistance of shunt required to make a milliammeter which gives maximum deflection for a current of 15 mA and which has a resistance of 5 Ω; read up to 10 Amp.

Last Answer : Answer :

Description : “Secondary of current transformer should not be open”. Justify.

Last Answer : Secondary of a CT should not be Open Circuited: If secondary of CT is open circuited ,then current through secondary becomes zero hence the ampere-turns produced by secondary which generally opposes primary ... opeartor point of view as well. So secondary of a CT should not be open circuited. 

Description : State the use of synchroscope.

Last Answer : Use of Synchroscope: The synchroscope is used to determine the exact instant of switching required to connect the alternators in parallel or put an alternator in parallel with the infinite bus. ... idea of the faster or slower machine to make adjustments in speed of alternators for synchronising.

Description : Give ranges of low and high resistances.

Last Answer : 1) Ranges of low resistance: Less than 1 ohm.  2) Ranges of high resistance: Greater than 0.1 Mega ohm.

Description : State the meaning of energy meter constant K. State its unit.

Last Answer : Meaning of Energy Meter Constant (K): Energy Meter Constant is the no. of revolutions made by disc in meter per unit (kWh) consumption of energy. Unit of energy meter constant K is rev/kWH

Description : Define electrical energy. State its unit.

Last Answer : Electrical Energy: Electrical energy is defined as the work done in moving electrical charge in electrical field. OR The total power delivered or consumed by electrical load over specific unit time ... unit of electrical energy is the joule (or watt-second) OR Kilowatt-hour ( kWH ).

Description : What is a Digital-to-Analog Converter (DAC) in Arduino?

Last Answer : A Digital-to-Analog Converter (DAC) in Arduino is a component that converts digital signals into analog signals, such as to control the output voltage to a motor or a speaker.

Description : What is an Analog-to-Digital Converter (ADC) in Arduino?

Last Answer : An Analog-to-Digital Converter (ADC) in Arduino is a component that converts analog signals, such as temperature or light, into digital signals that can be processed by the microcontroller.

Description : What is the difference between analog and digital signals in Arduino?

Last Answer : Analog signals in Arduino are continuous and can have any value within a range, while digital signals are discrete and can only have two states: on or off.

Description : What's the difference between digital and analog audio?

Last Answer : Not exactly. I know the difference, but it's hard to explain. Ok imagine that you have a glass of water. The more water you put in, the more water there is in the glass. It could be around 200ml ... want to be traditional and keep that good old days feeling. Yes, there is magic in analogue too.

Description : Did you had a hard time during the transition from analog to digital tv earlier tonight?

Last Answer : I have a digital TV. But channels vanished and I had to rescan to pick them back up. I have cable too.

Description : TCP helps in converting the digital signal to analog signal and vice_versa. -Technology

Last Answer : False The process of converting digital signal into analog signal is called modulation and is done by a modem.

Description : The digital signals to analog signals are carried out by ………., so that data can travel over telephone lines. -Technology

Last Answer : The digital signals to analog signals are carried out by MODEMso that data can travel over telephone lines.