Functional block diagram of a positive ramp type DVM is shown below. Important MCQ questions for GATE, ESE Engineering Service Examination, IES, PSU Examination and Study Material For Electrical and Electronics Engineering in Circuit Theory, Network Theory, Material Science, Power System, Control System, Measurement, Power Electronics, Transformer and Electrical Machine, Control System, EMT, Power Electronics, Microprocessor and Communication System. Join our social networks below and stay updated with latest contests, videos, internships and jobs! RAMP TYPE DVM Linear ramp technique: The basic principle of such measurement is based on the measurement of the time taken by l1 linear ramp to rise from a V to the level of the input voltage or to decrease from the level of the input voltage to zero. c) non-linear ramp Dual slope type DVM . a. Inductive coils b. Ramp-type Digital Voltmeter Voltage-to-time conversion Ranging and Attenuator DC input voltage-+ input comparator ground Ramp comparator Generator Sample Rate MV Oscillator Gate Counter Digital display start count stop count-+ v in v ramp 0 V start ramp reset clk Time measurement unit Block diagram of a ramp-type digital voltmeter. Continuous-balance DVM 1. Following table shows the pattern of UVAS Doctor of Veterinary Medicine (DVM) test. Timing Diagram of Ramp type DVM 6. View Answer, 5. What type of simple machine is found on the cap of a pickle jar? The comparator compares the output of digital to analog converter with unknown voltage. This gate is shown in the block diagram of below figure. d) ±5 V Digital Voltmeters: Introduction, RAMP technique, DualSlope Integrating Type DVM, Integrating Type DVM, MostCommonly used principles of ADC, SuccessiveApproximations, Continuous Balance DVM, -Digit,Resolution and Sensitivity of Digital Meters, GeneralSpecifications of DVM, Microprocessor based Ramp typeDVM. At the same time, a reset pulse is generated which returns all the DCU s to their 0 state, removing the display momentarily from the indicator tubes. b) The saturation voltage V CE for germanium transistor is more than silicon transistor. The sample rate multivibrator is used to reset the ramp generator. RAMP type DVM 7. View Answer, 8. It is best used for questions that require visual identity. , is continuously compared with the unknown input voltage. View Answer, 2. The operating principle of the ramp-type DVM is based on the measurement of the time it takes for a linear ramp voltage to rise from 0 V to the level of the input voltage, or to decrease from the level of the input voltage to zero. ramp DVM is shown in the Fig . Ramp type DVM uses ___________ b) ±10 V a. lever b. inclined plane c. screw d. wheel and axle b 4. Analog voltmeters generally contain a dial with a needle moving over it according to the measure and hence displaying the value of the same. a) oscillator Which of the following statement is true? d) by using a transformer For ramp inputs b. Vessel-type slug catchers can only be used if the incoming liquid volume is small. a) frequency d) oscilloscope At the start of the measurement cycle, a ramp voltage is initiated; this voltage can be positive-going or negative-going. DVM • A digital voltmeter, or DVM, is used to take highly accurate voltage measurements. Decimal counter. Block of logic circuitry. The ramp voltage continues to decrease with time until it finally reaches 0 V (or ground potential) and a second comparator generates an output pulse which closes the gate. Conversion from a voltage to a time interval is illustrated by the waveform diagram of Figure below. View Answer, 3. b) amplifier To practice all areas of Electrical Measurements, here is complete set of 1000+ Multiple Choice Questions and Answers. The sample-rate multivibrator determines the rate at which the measurement cycles are initiated. At the instant that the ramp voltage equals the unknown voltage, a coincidence circuit, or comparator, generates a pulse which opens a gate. The negative-going ramp, shown in Fig. Measurement cycles are initiated C. It oscillates D. Its amplitude varies A typical DVM is shown below. For DC voltmeters PMMC instruments are used, MI instrument can measure both AC and DC voltages, electrodynamometer type, thermal instrument can measure DC and AC voltages as well. Two types of voltmeters are available for the purpose of voltage measurement i.e. a) clock b) by counting the pulses When larger liquid volumes have to be accommodated, say of more than 100 m 3 (3531 ft 3), the pipe-type slug catcher should be used (Shell DEP, 1998). Linear ramp technique is based on __________ Digital Ramp Analog to Digital Converter (ADC) The Digital Ramp ADC is also known as a counter-type ADC. It has two major sections as the voltage to time conversion unit and time measurement unit. An op-amp employed as an integrator. The staircase ramp technique is a simpler version of linear ramp technique. a) The saturation voltage V CF of silicon transistor is more than germanium transistor. An electronic time interval counter is used to measure the time interval and the count is displayed in digits as voltmeter output. The voltage could be an alternating current (AC) or direct current (DC). Advantages 4. Subscribe to electronics-Tutorial email list and get Cheat Sheets, latest updates, tips & These instruments measure the electrical potential difference between two conductors in a circuit. b) time measurement In a ramp type DVM, the multivibrator determines the rate at which the. When an unknown voltage signal is applied to the input terminals of the instrument, a negative-slope ramp waveform is generated internally and compared with the input signal. It is called as null balancing technique. The operating principle of the ramp-type DVM is based on the measurement of the time it takes for a linear ramp voltage to rise from 0 V to the level of the input voltage, or to decrease from the level of the input voltage to zero. a type of machine d. a force that pulls you towards the Earth c 3. What is the typical value of the multivibrator? Measurement of Power & Related Parameters, here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Electrical Measurements Questions and Answers – Successive Approximation Type DVM, Next - Electrical Measurements Questions and Answers – Voltage to Frequency Converter Type Integrating DVM, Electrical Measurements Questions and Answers – Successive Approximation Type DVM, Electrical Measurements Questions and Answers – Voltage to Frequency Converter Type Integrating DVM, Statistical Quality Control Questions and Answers, Microwave Engineering Questions and Answers, Instrumentation Engineering Questions and Answers, Electronic Devices and Circuits Questions and Answers, Optical Communications Questions and Answers, Biomedical Instrumentation Questions and Answers, Electronics & Communication Engineering Questions and Answers, Wireless & Mobile Communications Questions & Answers, Engineering Metrology Questions and Answers, Design of Electrical Machines Questions and Answers, Instrumentation Transducers Questions and Answers, Electrical & Electronics Engineering Questions and Answers, Basic Electrical Engineering Questions and Answers, Electrical Engineering Questions and Answers, Electrical Machines Questions and Answers, Linear Integrated Circuits Questions and Answers, Electrical Measurements Questions and Answers. b) logic gates The successive approximation type DVM is special type of potentiometric DVM in which a digital divider is used in the place of linear divider. 1 – Digital Voltmeter and Multimeter The ramp type DVM uses a linear ramp or staircase ramp technique. c) counter Voltmeter is an electrical measuring instrument used to measure potential difference between two points. In contrast, the ramp type DVM s amples the voltage at the end of the measuring period. Ramp type DVM; In a ramp type DVM, the operation basically depends on the measurement of time. c) an exponential ramp technique single phase full wave controlled rectifier, single phase half wave controlled rectifier, three phase full wave controlled rectifier, non saturated type precision half wave rectifier, adjustable negative voltage regulator ics, three terminal adjustable voltage regulator ics, three terminal fixed voltage regulator ics, transfer function and characteristic equation, Power Dissipation minimization Techniques, Rules for Designing Complementary CMOS Gates, ASM Chart Tool for Sequential Circuit Design, Analysis of Asynchronous Sequential Machines, Design of Asynchronous Sequential Machine, Design Procedure for Asynchronous Sequential Circuits, Modes of Asynchronous Sequential Machines, Application Specific Integrated Circuits ASIC, parallel in to parallel out pipo shift register, parallel in to serial out piso shift register, serial in to parallel out sipo shift 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