Calibration and proving rigs for liquid flowmeters

CALIBRATION and PROVING RIGS for LIQUID FLOW METERS

CALIBRATION and PROVING RIGS for LIQUID FLOW METERS

Overview

We at Energoflow AG have designed and developed compact and effective Calibration and Proving Rigs for Liquid Flow Meters. 

TECHNICAL FEATURES

Parameter Proving Rigs for Liquids
Capacity
(m 3 /h)		 40,80,180,600
DN of calibrated flowmeters DN
(20, 25, 32, 40, 50, 80, 100, 150, 200, 250, 300)
Type of calibrated flowmeters Ultrasonic,Electromagnetic,
Vane, Coriolis
Relative Accuracy ±0,05%;
±0,15 %
Measurement,method Comparison
with standard flowmeter,
weighing method
Operating environment water/liquid,
hydrocarbons
Quantity of reference flowmeters 2,3,4
Accuracy of temperature measurement ± 0,15%
Accuracy of pressure measurement ± 0,15%
The principle of the functioning of the rig is as follows:
By switching on one or more fans a flow of the medium is generated in the piping of the rig. The flow-rate and pressure of the medium is regulated by controlling the pump, the fan and a diaphragm valve. The flow thus generated is measured by the reference flow meter as well as the flow meter being verified or calibrated. Reference pressure and temperature transmitters are used for determining the working conditions. The accumulated pulse quantity over a number of cycles is recorded and the total measured volume at standard temperature and pressure is calculated for both the flow meters. 

The comparison of the results gives a reliable measurement of the accuracy of the meter under verification. Different reference flow meters are used for different ranges of measurement which also improves the accuracy and reliability of the results.
Designed for automated testing, grading and calibration of meters, flow meters and mass meters of liquid using two measurement methods:
  • method of comparison with standard flow meter (mode 1);
  • method of static weighing (mode 2).
In mode 1 counters and flow meters with relative accuracy of volumetric flow-rate and volume measurement ±0,3 % and more are tested or calibrated.

In mode 2 the flow meters including mass meters with relative accuracy ±0,05% and more are tested and calibrated.
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