Pulse interpolation is used in much the same way as for dual chronometry, above, except that the mut and the height sensor are the two sources of pulses. With all background correction systems, there is a small time delay between the. Accuracy of sinc interpolation can be seen in frequency domain by comparing kernel spectrum to ilpf spectrum. Hyperpulse background correction the hyperpulse background corrector, one of the fastest systems available, has been further improved by pulse interpolation.
Implementation of doubletiming pulse interpolation applied to. What flowmeter calibration techniques do litre meter use. Chapter 4proving systems section 6pulse interpolation. Onboard storage 1 gb for audittrail, event and primary data logging in each module. Sep, 2015 this we achieve by double chronometry pulse interpolation while proving the master meter w. The module senses a series of pulses that represent a known fluid volume in a proving loop. The rrcfilter shall interpolate by 2, and its output shall be interpolated by 8, resulting in a total interpolation of 16. To determine the transitions for each pulse, pulseperiod estimates the state. The maxiflex meter prover module is used in meter proving systems for petroleum measurement the mx mp module uses pulse interpolation a method of double chronometry for increasing the resolution of flow metering pulses when proving meters. While only the dual chronometry method is illustrated in the api manual of petroleum measurement standards, this does not preclude the use of other methods, as long as they meet the criteria and test. If pulseperiod does not find two positivepolarity transitions, p is empty. This allows for more accurate interpolation of transient signals such as gf and hsa 3000 signals.
An electronic circuitry was built to activatedeactivate counters gates, and to collect pulses. Dual chronometry pulse interpolation english to french. The controller being operably connected to a module. All of our software is designed by pulse instruments for optimum flexibility and control. Double chronometry for api meter proving as described in api mpms. This interrupt is used in the pulse accumulation between the detectors as well as the pulse interpolation calculations. Time counter a is started when displacer or flag 24 trips. We offer emarketing, sales, service, project management, inventory and financials. Pulse business software delivers innovative cloudbased business solutions to suit small, medium and corporate businesses.
Double chronometry pulse interpolation uses a high frequency master oscillator which increments time very precisely e. Implementation of doubletiming pulse interpolation applied. Options include dual solid state relays for local alarm or control and an isolated 420 ma or 10v selectable analog output, effectively providing a linearized analog transmitter output that tracks the reading that would be transmitted digitally. Unhaltable, normal, period, error, maintenance, positive and. Litre meter have developed a simple program that enables quick monitoring of.
There are different types of prover arrangements in the market 3,57. There are currently 3 main approaches to pulse interpolation. The complimentary flowxpress software allows for virtually unlimited. The machine requires the use of an operating computer that is capable of dual chronometry pulse interpolation. Builtin redundancy for dual power supply, dual ethernet and software. Unlimited number of period and batch totals and flow and time weighted averages.
Hello, im supposed to design a transmit chain with a rootraised cosine pulse shaping filter followed by some interpolation stages. Automated pneumatic spring plenum pressure control. Pulse contour cardiac output relies on a good quality of arterial trace. The use of the dynamic density values provides for a more accurate. Full support for redundancy builtin, for power supply, ethernet, and in the software. Dynamic fluid measurement sfc3 liquid pulse manual quick start 16 date. Pulse interpolation, though a mathematical technique, relies on the underlying and contributing uncertainty of the prover detector signal. Prover support with unidirectional, bidirectional, compact prover, master meter, with dual chronometry and pulse interpolation with a resolution of 100ns. Smith meter turbine meters utilizing the smith meter. Svps require the use of an operating computer that is capable of dual chronometry pulse interpolation. Pulse interpolation is used in much the same way as for dual. P pulseperiodx returns a vector, p, containing the difference between the midreference level instants of the initial transition of each positivepolarity pulse and the next positivegoing transition in the bilevel waveform, x. Compact, unidirectional, bidirectional, master meter, dual chronometry, pulse interpolation.
This we achieve by double chronometry pulse interpolation while proving the master meter w. B2 others applied for, truproof is the most advanced dual chronometric, pulse interpolation proving technique in the world today. M factors computed by the software to the system and enjoy another. Determining parameters for images amplification by pulses. Interpolation kernel can be pregenerated in subsample intervals and stored in a table. S pulsesepx returns the differences, s, between the midreference level instants of the final negativegoing transitions of every positivepolarity pulse and the next positivegoing transition. The pulse generator thyristor block is controlled by the alpha angle reference signal and by the synchronization signal wt.
Pulse interpolation function standards compliance performs all logic necessary to perform automated meter proving, and performs pulse interpolation using the double chronometry method in accordance with the manual of petroleum measurement standards chapter 4 proving systems. Some requirements and limitations of pulse interpolation techniques. Mar 25, 2004 utilizing dynamic density values with the dual chronometry pulse interpolation standard equation of api 2540 takes into account the effects that changing pressure and temperature of the fluid and the material of the conduit 16 itself will have on the calculated flow volume. Performs pulse interpolation calculations in real time. Data acquisition and control software were written using vb. The module being operably connected to a flow meter.
Dual pulse input totalizer modbus or laurel ascii protocol. The maxiflex meter prover module is used in meter proving systems for petroleum measurement the mx mp module uses pulse interpolation a method of doublechronometry for increasing the resolution of flow metering pulses when proving meters. Double chronometry pulse interpolation requires a high frequency master oscillator which. This problem can be resolved by using pulse interpolation based on pulse chronometry techniques, similar to those described in api mpms chapter 4. Double chronometry for api meter proving as described in api mpms chapter 4. Potential users are cautioned that use of the technique absent the requisite accuracy can produce misleading results. May 20, 2008 double chronometry pulse interpolation uses a high frequency master oscillator which increments time very precisely e. These comparisons do, however, suggest that these three pulse contour methods are not interchangeable. St500 is one of a range of new generation simulators designed to meet the requirements for checking and calibrating fiscal and custody transfer flow computer systems. The reason given by the authors is the use of different proprietary algorithms, which measure different aspects of the pulse contour waveform which is an interesting point. This master oscillator operates two counters which may be referred to herein as time counter a and time counter b. Through the use of pulse interpolation, meter proving can be accomplished with less than.
Pulse interpolation flow measurement detector radio. When used with dual pulse turbine meters, the apm can be used to create two api 5. Pulse instruments specializing in meters and controls for ph, orp, oxidation reduction potential, ec, conductivity, tds, level, flow, ise electrodes, isfet ph meters, water treatment instruments, sanitizer and many others. Pulse interpolation is calculated in compliance with api mpms chapter 4. Instrumentation with timers, counters and pulse interpolation see diagram 6. Pattern editing and control graphical waveform editor and control software for pulse instruments pi2005 patten generators, including pattern generators integrated into our test systems. Details of every prove will be recorded in the truproof micro3 microcomputer, and transferred to associated systems, such as, flowcals proveit proving software platform. Onboard storage 1 gb for audittrail, event and primary data logging in.
Pulse interpolation is a pulse counting technique used to calculate the total number of meter pulses between two detectors, including fractional pulses. Computational cost is proportional to kernel length. Separation between bilevel waveform pulses matlab pulsesep. Indication green led indicates when pulse input is on. June 2005 part 2 small volume provers history, design. Eliminates miles of field wiring during installation and the signal deterioration this generates. The pulseinterpolation method known as doublechronometry, described in this chapter, is an established technique used in proving flowmeters.
A single software command switches between the modbus and laurel ascii protocols. The wt signal is an angle varying between 0 and 2pi radians, synchronized on zero crossings of the fundamental positivesequence. Time taken to displace voume in the compact prover. Accuracy of interpolation dependent upon kernel length. A method and apparatus for utilizing a controller to monitor a flow volume in a fluid transportation system. Dual chronometry pulse interpolation provides fractional pulses for small volumes. Without pulse interpolation a prover that is 3 to 25 times larger than standard would be required to obtain a minimum of 10,000 counts per proving pass. Calibration curve up to unlimited number of points linear and polynome. We introduce the complex amplitude and the corresponding power of a gaussian pulse according to at a 0 exp t2 2t2 0.
To determine the transitions that compose each pulse, pulsesep estimates the state levels of x by a histogram method. A pulse interpolation method used in small volume provers to provide for fractional meter pulse counting. Chronometric definition of chronometric by the free. Generate pulses for twelvepulse and sixpulse thyristor. Please fill out the following form to request an evaluation copy.
Index pulse interpolation double chronometry method topics that. Metrology approvals1 include mid, oiml r117, and en12405. The module also measures the fluid density of the fluid in the proving loop. Chronometric definition of chronometric by the free dictionary. Select either windows or dos software based on step 2. Utilizing dynamic density values with the dual chronometry pulse interpolation standard equation of api 2540 takes into account the effects that changing pressure and temperature of the fluid and the material of the conduit 16 itself will have on the calculated flow volume. Time taken for the generation of pulses in the flow meter. Period of bilevel pulse matlab pulseperiod mathworks. Uses pulse interpolation dual chronometry for small volume provers svp. This allows a better reconstruction of the details including the use of the characteristics of this type of amplification in order to achieve linear phase response in the edge transitions of the high resolution image. The range combines uptodate microprocessor and direct digital synthesis technology with easy to use, menudriven lcd operation. Why then would one want to use something like this which generates x at outputs. Flowx series flow computers pt pratiwi putri sulung. All of the components including a choice of fluid reservoirs are together in one enclosure, temperature controlled, to maintain consistency.
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