Digital frequency meter frequency measurement high. Nasas jet propulsion laboratory, pasadena, california the software of a commercially available digital radio receiver has been modified to make the receiver function as a twochannel lownoise phase meter. The model 6000a phase meter replaces the very popular model 6000. Digital panel meters avf meter manufacturer from pune. Built in capability for balanced loads view graphs and generate reports. Datakom da0303 digital ammeter panel 3 phase, 170275v power supply voltage testers. A measuring system with three multipliers is required for 4wire three phase systems of unbalanced load with neutral conductor n. One single phase energy meter, one single phase load, stop watch and connecting wires. In other words, the algorithm can process a serial signal using only two consecutive data points. New digital phase meter concept and its application. Simple digital phasemeasuring algorithm for lownoise. To study the construction and working of single phase energy meter and to find out energy consumed in 30 minutes.
It counts the number events occurring within the oscillations during a given interval of time. This algorithm can be easily applied to realtime signal processing. Using the latest digital techniques and optimally designed analog front end, the model 6000a outperforms any other phase meter on the market today. Technical specifications for three phase energy meter the equipment covered by these broad specifications shall conform to the requirements stated in latest editions of relevant indian iec standards and. It gives a digital output number independent of the input frequency or. Implementation of a singlephase electronic watthour meter using msp430afe2xx rev. The energy is the total power consumed and utilised by the load at a particular interval of time. It is used in domestic and industrial ac circuit for measuring the power consumption. The unit automatically selects the proper range for both amplitude and phase. The actual zerocrossing time is indicated by the open squares. A phase shift is a time difference between two signals of the same frequency.
Each phase is 120 degrees out of phase with the others. The signal waveform is converted to trigger pulses and applied continuously to an and gate, as shown in fig. The function of recording or registering mechanism is to record continuously a number on the dial which is proportional to the revolutions made by the moving system. Meter bases shall include a neutral conductor except multigang. By using appropriate transducers, it is also possible to measure high currents and voltages with the 3phasecurrent meter. Abstractthis paper describes a simple digital phase meter using the dualslope principle. Manufacturer of phase rotations meter ac meter voltage detector htc, 3 phase rotation meter htc offered by sunshine instruments, coimbatore, tamil nadu. The principle of operation of digital frequency meter is given by. Pdf this paper presents a simple yet effective method to determine the phase angle difference across any load connected to the supply. Phasemeter definition of phasemeter by merriamwebster. The focus meter was designed to be a lowcost, solidstate, kwhonly meter as an alternative metering and amr platform to the induction meter.
Type of display like analog or digital electric meter. Programmable triple displays digital ac single phase power. Pdf a single phase microcontroller based energy meter. A phasemeter measures the relative phase of two electronic signals.
Digital meters munhean industrial electrical solutions. At the discretion of the company, units returned under this warranty shall be either repaired or replaced at no cost to the customer. The filtered sine wave is then converted to a square wave. Datakom da0303 digital ammeter panel 3 phase, 170275v. Purpose the user manual contains all the information required for application of the meters for. A measuring system with three multipliers is required for 4wire threephase systems of unbalanced load with neutral conductor n. Low latency output for laser phaselockingarmlocking. A digital phase meter is described which is capable of operating from arbitrarily low frequencies to 10 khz, for which the lower limit depends essentially upon the. The fluke 9040 is a rotary field indicator and can provide clear indication of the 3 phase via an lcd display and the phase rotation direction to determine correct connections. A pulse of 1 s is applied to the other terminal, and the number of pulses counted during this period indicates the frequency. The meter platform will measure energy accurately over varying environmental conditions.
Pdf development of a digital phase angle meter researchgate. With included power log software fluke 345 power quality clamp meter with a bright color display to analyze the harmonic spectrum, a lowpass filter to remove high frequency noise, and a high emc immunity design, the fluke 345 is ideal for. The fluke 9040 is effective for measuring phase rotation in all areas where three phase supplies are used to feed motors, drives and electrical systems. Digital 3phase ac electric lcd voltage meter multifunction voltage current meter voltmeter ammeter smart instrument. Three phase whole current trivector energy meter er300p. The gima series offers accurate, highspeed, continuous measurements irrespective of harmonics and waveform interruptions. Energy meter is an instrument which measures electrical energy. As the preset period gets completed, the value in the counter. First, the signals must be shaped to a square waveform without any change in their phase positions, by the use of a zero crossing detector. Here we discuss the construction and working principle of induction type energy meter. This paper presents a single phase electrical energy meter based on a microcontroller from microchip technology inc. Type of metering point like grid, secondary transmission, primary and local distribution. A single phase meter is used in alternating current systems.
Implementation of a singlephase electronic watthour. Digital phase meter circuit intermetall, division of ditti. End applications like domestic, commercial and industrial. Electrical energy meters principles and applications.
This meter is used for commercial metering and for metering of small industrial loads. Manufacturer of digital panel meters avf meter, energy meter, multifunction meter and power analyzer and vif meter offered by darade corporation, pune, maharashtra. Digital filter phase fluctuations from independent clocks. Epa10 122 491 discloses a digital phase meter circuit for determining the phase difference between the edge of a pulse of a first clock signal and the edge of a pulse of a second clock signal in the sampling interval of two pulses of the second clock signal. Digital phase meter the simplest technique to measure the phase difference between two signals employs two flipflops. The simpson gima series digital power meters provide a single source of instrumentation for all measurement and metering requirements. The signals to be fed must be of the same frequency. As a result, we have found it necessary to discontinue the 2250 and 2251 phase angle voltmeters which you may have previously purchased. It is used everywhere, no matter how big or small consumption it is. Metsepm1200 pm1200 power meter with energy and demand with communication. Digital receiver phase meter a commercial digital receiver is modified into a twochannel phase meter.
Utilities are one of the electrical departments, which install these instruments at every place like homes, industries, organizations, commercial buildings to charge for the electricity consumption by loads such as lights, fans, refrigerator. Over the past several years, nai has worked hard to manage component issues, but has now encountered multiple component obsolescence issues which cannot be managed. Hastings warrants the catalog number 6702 digital voltage phase meter to be free from manufacturing defects, for a period of one year from the date of purchase to the original owner. The 3phasepower meter pcend10 was designed for panelmounting in 92 x 92 mm panel cutouts.
We sometimes need to know how much phase shift is present. The input signal of each input is filtered to minimize the harmonic distortion that may be present. Energy meter or watthour meter is an electrical instrument that measures the amount of electrical energy used by the consumers. The two square waves are compared by the logic circuit. Digital meter leading manufacturer of av33 1 phase voltamp meter, amp19n multispan digital panel meter, av33 digital laboratory meter, avf19n multispan digital avf meter, avf19n vaf meter and avh 14n digital vaf meter from rajkot. The easy, allinone phasing voltmeter with numerous applications. The meter which is used for measuring the power of three phase supply is known as the three phase energy meter. Metsepm1200 pm1200 power meter with energy and demand. View and download mastech ms2203 user manual online. Digital meter av33 1 phase voltamp meter manufacturer. Technical like three phases, single phase, ht, lt and accuracy class meters. Energy meters are the basic part to measure the power consumption. Each gima unit can be used as a singlephase or a threephase meter. The total energy is the sum of the reading of both the elements.
Alpha meter il424001s 8 4 wire delta meters circuit closing device 1 2 3 n 3 2 1 n form 10s form 8s application 3 phase, 4 wire delta, 3 cts, no pts 20e01 wiring is different than a traditional form 8 meter form 10a form 8a application 3 phase, 4 wire delta, 3 cts, no pts 23e01 1 2 3 n 3 2 1 n wiring is different than a traditional form 8. Hpl energy meter hpl energy meter latest price, dealers. It gives a digital output number independent of the input frequency or the clock. Among digital phase meters, the conventional digital phase meter, made from a gated counter as shown in fig. The meter which is used for measuring the energy utilises by the electric load is known as the energy meter. A singlephase meter is used in alternating current systems. An electric meter or energy meter is a device that. Abstracta microcomputercontrolled measuring instrument for phase angle measurement in low frequency range is described. The 3phasepower meter pcend10 is able to perform current, voltage and power measurements in 3phase systems. Er300p is a trivector meter which integrates several functions and replaces various equipment for metering energy parameters.
Electric service and digital meter installation requirements. Battery general description threephase digital power clamp meter is a handheld aptitude meter with power measurement, it is incorporated current meter and power measurement. A simple digital phase meter using the dualslope principle is described. For more field useful purpose, rs485 digital output is a necessary equipped. The threewattmeter method can also be used in the absence of a neutral conductor if an artificial neutral is available.
Arm based smart single phase energy meter with automatic bill generation and sms alert, rohit upadhyay, a. The model 175a digital phase angle meter operates by measuring the elapsed time between the zero crossover of input 2 versus input 1. For multiple meter bases, all services except single family under one roof, meter bases must be clearly and permanently marked with ele. It measures volts, amps, frequency, active power, apparent power, reactive power, active energy, reactive energy, power factor, amp demand, apparent power demand, active power demand, maximum amp demand, maximum apparent power demand, maximum active power demand, and thd on voltages and currents. Singlephase dinrail kwh energy meters drk1ppo240 singlephase 230v 15a direct connected, pulse output this innovative two din module kwh energy meter measures the real consumption of active energy to class 2 accuracy with a resolution of 0. Phase rotations meter ac meter voltage detector htc. This electronic meter does not possess any rotating parts, and the. Phase measurement using wave amplitude standardization for both analog and digital measurements. Meter bases for commercial services and 320 singlephase residential services shall be provided with lever bypass handles. The meter is based on reliable, field proven digital multiplication measurement technique. Digital frequency meter is a general purpose instrument that displays the frequency of a periodic electrical signal to an accuracy of three decimal places. The three phase meter is constructed by connecting the two single phase meter through the shaft. In this paper we present a digital phase meter that is capable of measuring phases from signals with multiple heterodyne frequencies.
A digital meter relay consisting of a digital panel meter with a comparison function using digital switches has been developed. Overview of the lisa phasemeter daniel shaddock, brent ware, peter halverson, robert spero and bill klipstein. A phase detector is a mixerlike circuit that puts out a signal that is proportional to the phase difference between two input signals of the same frequency. Gravitational wave information is contained in the phase of this beat note.
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