What is master meter prover?
The master meter is used for automatic periodic verification of the duty meters. To verify the master meter itself, a ball prover or small volume prover can be used, or the meter can be returned to a calibration facility, or a mobile prover can be applied to the master meter.
How does a prover work?
Provers work by passing a known volume of air through a meter while monitoring the gas meters register, index, or internal displacement. The prover then displays a proof, a value expressed as a percent which compares the volume of air passed with the volume of air measured to determine the meters accuracy.
What is a prover?
What is a Prover? A prover is an automated system that provides on-site calibration to ensure flow meters in service for fiscal and custody transfer applications maintain sustainable measurement performance as well as remain in compliance with industry standards.
What is K-factor in flow measurement?
The “K-Factor” of a water meter is the manufacturer’s way of describing liquid flow through their meter. A K-factor of “100” means that there are 100 “pulses” produced for each gallon of water.
How do you calculate meter factor?
The meter factor is obtained by dividing the prover test volume by the indicated volume of the meter. Once the meter factor is determined it is used as a volume correction in the calculation for net standard volume of a receipt or delivery of liquids.
What is a prover sphere?
Seamless, inflatable meter proving and pipeline spheres eliminate concerns over seam splitting or delaminating. The unique manufacturing process permits valve bodies to be firmly embedded in the wall of the pipeline sphere to prevent leakage around the valve.
What is a ball prover?
A sphere prover, also called a ball prover or pipe prover, operates on the principle of the repeatable displacement of a known volume of liquid from a calibrated section of pipe between two detectors. Displacement of the volume of liquid is achieved by an oversized sphere/ball traveling through the pipe.
What is a prover tank?
Proving Tanks (Tank Provers)
Proving Tanks are precision open volumetric calibrating measures. They enable on site calibration of liquid Flow Meters, Master Meters & vehicle tanks with high degree of accuracy & reliability.
What is a small volume prover?
The Small Volume Prover (SVP) is a unidirectional captive displacement prover. It offers an uncertainty better than API recommendation of 0.02%. It is the best choice for proving liquid Coriolis, Ultrasonic, Positive Displacement, and Turbine meters.
How do you calculate k flow rate?
The K-factor is the frequency divided by the flow rate => [1/s] / [g/s] = 1/g. Knowing the K-factor for each calibration point, the factory determines the best fitting K-factor for that particular flowmeter. Calibration points are determined by averaging all K-factors.
What is difference between K-factor and meter factor?
The meter base K-factor is used in the flow computer’s calculation of the quantity of liquid delivered, so it must be considered during the testing of a meter. The proving K-factor (PKF) is used to calculate the correct meter factor based on the pulses it receives while a known amount of liquid passes through the SVP.
What is the K-factor formula?
Mathematically, K = (180×BA) / (π×θ×T) − (Rᵢ/T) .
How does a small volume prover work?
Small Volume Prover by Honeywell Enraf – YouTube
What is meter factor in flow measurement?
Meter factor means a ratio obtained by dividing the measured volume of liquid that passed through a prover or master meter during the proving by the measured volume of liquid that passed through the line meter during the proving, corrected to base pressure and temperature.
What is double chronometry?
Double chronometry.
A pulse interpolation method used in small volume provers to provide for fractional meter pulse counting. (NIST HB 105-7) Generally, double chronometry uses a component that increments time very precisely and operates two counters.
How does a piston prover work?
What is K in flow rate?
What is K-factor in calibration?
K-Factors are calibration values (pulses per unit of volume) used to convert flow sensor output frequencies to flow rates. This calculation tool helps you to determine the correct K-Factor for your flow sensor.
What is a good K-factor?
A good K-factor is one that is higher than one, even fractionally. This indicates viral growth and that your K-factor surpasses your churn rate. A K-factor of one indicates stability as your app isn’t growing or declining. Conversely, a K-factor below one reveals that your app’s virality is in exponential decline.
What is a normal K-factor?
The K-factor is usually somewhere between 0.3 and 0.5.
What is pulse interpolation?
Pulse interpolation techniques are commonly used to increase resolution and to diminish uncertainty during a proving run by estimating the fractional part of meter pulses within the time interval of the calibration.
How is flow meter factor calculated?
What is a 95 uncertainty level?
The statement of uncertainty is reported with a coverage factor of k=2, which indicates approximate 95% confidence (it’s actually 95.4%). On a practical level, this means that if you were to make 100 measurements, you could be confident that (at least) 95 of them would be accurate to within the stated uncertainty.
What is a normal K factor?