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I3. The converter electronics shall be wall mounted adjacent to the flow tube and shall be <br /> provided in a NEMA 4 rated enclosure. The converter shall be microprocessor <br /> controlled, utilizing digital signal processing with automatic zero correction to provide <br /> a linear 4-20 mA signal proportional to flow rate. Rangeability shall be field adjustable <br /> over a 100 to 1 range. Field adjustable signal dampening shall be provided. Low flow <br /> cutoff shall be provided to eliminate flow transients when no flow is present in the pipe. <br /> The converter shall have self diagnostics which constantly check for proper operation. <br /> 1 If a failure occurs, a fault indication shall be provided to notify the operator of a problem. <br /> The converter shall contain a self test mode to allow the operator to manually simulate <br /> the output 4-20 mA signal to any value between 0% and 100% to check out any driven <br /> devices in the loop. The converter shall be rated to operate in a ambient temperature <br /> range from 14 to 122 °F. <br /> 4. The meter, converter, and components shall be designed for operation from a power <br /> source of 24 VDC, with a power consumption of less than 20 watts. <br /> 5. Additional special cabling, mounting hardware, and devices necessary to complete the <br /> installation shall be provided by the manufacturer at no additional cost to the Owner. <br /> f 6. The meter shall be hydraulically calibrated at a facility located in the United States and <br /> the calibration shall be traceable to the National Bureau of Standards. A certified copy <br /> of the calibration test results shall be submitted to the Owner prior to shipment of the <br /> meter. <br /> 7. The accuracy of the complete metering system including flow tube and converter <br /> electronics shall be 1% of rate over the range settings of 3 to 31 feet per second. <br /> Variations in temperature,voltage, and frequency within the ranges listed herein shall not <br /> affect the accuracy in excess of 0.5% of flow rate. <br /> 8. The flow meter shall be a Sparling Tiger-Mag model 655 with converter unit or <br /> approved equal. <br /> r <br /> r <br /> ELECTRICAL <br /> 16000 - 27 <br />