Standar Teknik Pengukuran Gas (Gas Metering Standards and Codes)

OIML R-140: Measuring Systems for Gaseous Fuel

Scope of Application
Terminology
Description
Units of Measurement and Abbreviations
Metrological Requirements
Technical Requirements for Measuring Systems
Technical Requirements for Meters, Metering Modules and Ancillary Devices
Technical Requirements for Electronic Devices
Metrological Control
Energy Measurement

Preliminary Information on the Scope

Legal metrological control:

         1. Only to meters (OIML R 137-1)
         2. Only to some individual parts of the measuring system
         3. To the complete measuring system

Scope of application for gaseous fuel

      1. with a designed maximum flowrate Qmax equal to
        or greater than 100 m3/h at base conditions and
        for operating pressures equal to or greater than
        200 kpa absolute
        2. not fitted with diaphragm gas meters

Measuring System and Its Constituents

Meter: Instrument intended to measure, memorize and display the volume or mass of gas passing through the flow measuring device at metering conditions (the display may be a remote indicating device)
Flow Measuring Device: part of the meter that converts the volume or mass flow of the gas to be measured into signals for the calculator (including sensors and transducer)
Sensor: element of a measuring instrument or measuring chain that is directly affected by the measurand
Measuring Transducer: device that provides and output quantity having a determined relationship to the input quantity
Ancillary Devices: repeating indicating device, printing device, memory device, totalizing indicating device, conversion device
Additional Devices: filter, flow conditioner, branch or by pass line, valves, pressure reduction device, sampling systems, piping, etc.

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