Meter shall be suitable for 25 percent warmer than the fluid operating temperature and for 25 percent higher than either the fluid’s operating pressure or 25 percent higher than the piping system’s safety valve set pressure, whichever is higher. Meter flanges shall be Class 300 or higher, if required by the piping system’s temperature and pressure Class. Meter shall be suitable for installation in ambient conditions ranging from -29 to 60 degrees C (-20 to 140 degrees F). Provide meter data head. Meters have digital readout of pressure-compensated flow rate and totalization located at transmitter and transmit flow rate and totalization digital signals to the Site Data Aggregation Device// and recorders//. Provide programmable microprocessor electronics with on-board programming. Output signals shall be immune to ambient temperature swings. Processor shall include continuous self-diagnostic routines that identify electronics problems and provide a warning. Electronics shall be replaceable in the field without affecting metering accuracy. Provide power supply as recommended by meter manufacturer. Mount electronics in a NEMA 4 enclosure separate from meter body in position accessible from platform or floor without the use of a portable ladder. Power supply to meter and transmitter shall be 120V/60Hz. Provide a Class 2 control voltage transformer for 24 VDC power to meter as needed. Provide an internal battery, provided for 24-month retention of RAM contents when all other power sources are removed. Performance: Transmitted signal from flowmeter and its transmitter shall have a total (rms) accuracy plus or minus 1.5 percent of flow rate. Flowmeter accuracy shall be no more than plus or minus 1 percent of span for gasses and plus or minus 0.7 percent of span for liquids. Flowmeter repeatability shall be no more than 0.2 percent of actual flow rate. Meter shall be designed to minimize vibration effect and to provide elimination of this effect. Minimum turndown ratio shall be 20:1 for gasses and liquids. Maximum fluid pressure drop shall be as scheduled.
Meter shall be suitable for 25 percent warmer than the fluid operating temperature and for 25 percent higher than either the fluid’s operating pressure or 25 percent higher than the piping system’s safety valve set pressure, whichever is higher. Meter flanges shall be Class 300 or higher, if required by the piping system’s temperature and pressure Class. Meter shall be suitable for installation in ambient conditions ranging from -29 to 60 degrees C (-20 to 140 degrees F). Provide meter data head. Meters have digital readout of pressure-compensated flow rate and totalization located at transmitter and transmit flow rate and totalization digital signals to the Site Data Aggregation Device// and recorders//. Provide programmable microprocessor electronics with on-board programming. Output signals shall be immune to ambient temperature swings. Processor shall include continuous self-diagnostic routines that identify electronics problems and provide a warning. Electronics shall be replaceable in the field without affecting metering accuracy. Provide power supply as recommended by meter manufacturer. Mount electronics in a NEMA 4 enclosure separate from meter body in position accessible from platform or floor without the use of a portable ladder. Power supply to meter and transmitter shall be 120V/60Hz. Provide a Class 2 control voltage transformer for 24 VDC power to meter as needed. Provide an internal battery, provided for 24-month retention of RAM contents when all other power sources are removed. Performance: Transmitted signal from flowmeter and its transmitter shall have a total (rms) accuracy plus or minus 1.5 percent of flow rate. Flowmeter accuracy shall be no more than plus or minus 1 percent of span for gasses and plus or minus 0.7 percent of span for liquids. Flowmeter repeatability shall be no more than 0.2 percent of actual flow rate. Meter shall be designed to minimize vibration effect and to provide elimination of this effect. Minimum turndown ratio shall be 20:1 for gasses and liquids. Maximum fluid pressure drop shall be as scheduled.
VA%2025%2010%2010.docx