The principle behind this equipment is simple, it takes the value of input voltages and measures the time to take input voltage to reach zero volts or vice versa. Dual slope type DVM Basic Hand-held Multimeter, Bench type Digital Multimeters, Comparison of Analog and Digital Multimeters, Digital LCR meters. • The voltage to frequency (VIF) converter functions as a feedback control system which governs the rate of pulse generation in proportion to the magnitude of input voltage. (8) (ii) Draw the block diagram of digital frequency meter and explain. • The operating principle of a ramp type digital voltmeter is to measure the time that a linear ramp voltage takes to change from level of input voltage to zero voltage (or vice versa). Explain the working operation of Ramp type ADC 2. Must be placed in parallel. Operation principle The voltage could be an alternating current (AC) or direct current (DC). Looks like you’ve clipped this slide to already. (b) (i) With necessary diagrams explain Ramp type digital voltmeter. A typical DVM is shown below. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Digital voltmeter 1. The staircase ramp technique is a simpler version of linear ramp technique. 2nd slide Ramp Technique The operating principle is to measure the time that a linear ramp takes to change the input level to the ground level, or viceversa. AC voltages can … - Title: PEUKUR TEGANGAN Author: Toshiba Last modified by: toshiba Created Date: 11/17/2007 9:21:16 AM Document presentation format: On-screen Show (4:3) Title: PEUKUR TEGANGAN Author: Toshiba Last modified by: toshiba Created Date: 11/17/2007 9:21:16 AM Document presentation format: On-screen … Digital Voltmeter by S D Ruikar 2. It measures the input voltage after converting the analog voltage to digital voltage and displays it in number format using a convertor. One input to the input comparator is from the input, If the ramp signal is more than input voltage there will be no output but if the input voltage is greater than the ramp signal then a is generated which will open the gate. Successive-approximation DVM. Kedua adalah voltmeter jenis digital tipe penggabungan atau intergrasi (integrating DVM). It eliminates observational errors like parallax or approximations completely. • This time interval is measured with an electronic time interval counter and the count is displayed as a number of digits on electronic indicating tubes of the output readout of the voltmeter. Digital Voltmeter is a voltage sensitive device. Analog voltmeters generally contain a dial with a needle moving over it according to the measure and hence displaying the value of the same. Learning how to use those meters and using them to measure the current, voltage, and resistance of an electric circuit. Flash Type ADC is based on the principle of comparing analog input voltage with a set of reference voltages. Rectifier type voltmeter, electrostatic type and also digital voltmeter (DVM) can measure both AC and DC voltages. The principle and working of the Ramp type ADC is explained in a simplified manner in this post. This time period is measured with an electronic time-internal counter and the count is displayed as a number of digits on a display. To convert the analog input voltage into a digital signal of n-bit output, (2 n – 1) comparators are required. Disadvantages: It is the slowest ADC among all. Digital Voltmeter - Part II. There two types of digital multimeters (DMM): scalable digital multimeter and auto-ranging digital multimeter as shown in Figure 1. On the basis of A/D conversion method used digital voltmeters can be classified as: Ramp type digital voltmeter Integrating type voltmeter Jenis digital masih dikelompokkan lagi ke dalam 4 jenis, yakni, pertama, Voltmeter digital tipe tanjak atau ramp type DVM . No public clipboards found for this slide, Student at gitam institute of technology,gitam university. It is used in the design of digital voltmeter. The voltage could be an alternating current (AC) or direct current (DC). Timing Diagram of Ramp type DVM 6. Two types of voltmeters are available for the purpose of voltage measurement i.e. Now when the gate gets opened, clock, comparator will compare the ramp signal and ground and output is given. For n bit dual slop type of ADC, Vr = ( 2 n /N ) * Va Total time for conversion of input Va is expressed as follows: Total Time = (2 n + N)* T CLK. The dual-slope type of AtoD conversion is a very popular method for digital voltmeter applications. When current carrying conductor placed in a magnetic field, a mechanical force acts on the conductor, if it is attached to a moving system, with the coil movement, the pointer moves over the scale. Voltmeter is an electrical measuring instrument used to measure potential difference between two points. Types of Meters. The merits and demerits of the Ramp type ADC is also listed at the end of the post. Continuous-balance DVM . Some time is taken by the circuit between opening and closing of the gate can be given by T, now.Jun 20, 2013. ramp type digital voltmeter block diagram It has no.Draw the labelled block diagram of ramp type DVM. When working with the scalable digital multimeter you need to have an idea of the value of voltage, current, or resistance that you are attempting to measure. 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