What is BS EN 12405-3 - flow computer for gas meters about?
BS EN 12405 discusses gas meters. BS EN 12405-3 is the third part of BS EN 12405 multi-series and discusses flow computer for gas meters. BS EN 12405-3 European Standard specifies the requirements and tests for the construction, performance, safety, and conformity of flow computers (FCs) used to meet the metrological and technical requirements of a high accuracy volume conversion device.
They are used to determine the volume of fuel gases, including those of the first and second families according to EN 437. BS EN 12405-3, only flow computers that are intended to operate with ultrasonic meters according to ISO 17089-1 or gas turbine meters conforming to EN 12261 are considered. BS EN 12405-3 only classification classes E2 and M1 are considered for the flow computer calculator.
Who is BS EN 12405-3 - flow computer for gas meters for?
BS EN 12405-3 on flow computer for gas meters is useful for:
- Gas flow meter manufacturers
- Meter manufacturers
- Utility providers
- Quality control personnel
Why should you use BS EN 12405-3 - flow computer for gas meters?
A high accuracy volume conversion device can be needed depending on the intended use. BS EN 12405-3 is established to meet severe requirements concerning the accuracy and related functions.
BS EN 12405-3 provides you with the functions although these functions can be physically located in different components (e.g., calibration curve programmed in the measuring equipment itself or in the calculator).
BS EN 12405-3 provides you with four main categories of functions to achieve data processing:
- Sensor signal Acquisition functions: to process signals from physical quantity provided by sensors and transducers to measurands
- Sensor functions: to convert measurands to correct measurements, mostly based upon calibration results and filtering procedures
- Metering functions: to calculate derived values such as volume, calorific value, compression factor, etc. based upon international standards and formulas and to take care of the supervision and monitoring for the purpose of high accuracy and substitution values
- Long Term Data Storage functions: to keep all relevant information necessary to construct or reconstruct calculated values
