Gas & Steam Flow Computer
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Gas & Steam Flow Computer Model 415 Features y Displays mass flow, corrected volume and energy flow y Accepts 4-20mA and frequency flow inputs y Temperature and pressure compensation y Dual ranged DP transmitter inputs y Operates from 14-28V dc or ac mains y Simplified programming y Data logging output Overview The 415 Steam and Gas Flow Computer incorporates the following compensation equations for gas and vapours: y Ideal Gas Law using temperature and pressure correction, but where compressibility correction is not required. y General Gases where compressibility is calculated using the Redlich-Kwong1 state equation. This equation is suitable for gases which have known properties, and information on common industrial gases is provided in the operating manual. equation to calculate super compressibility. y Steam Equations for both saturated and superheated steam. Mass and energy flow rates are calculated using standard equations to determine the specific weight and enthalpy of steam. The backlit alphanumeric display simplifies programming and provides a clear indication of all parameters, as well as engineering units. The 415 is fully programmable and all operating parameters are entered via the front panel keypad. The instrument is available with direct RTD input (415R) or with 4-20mA temperature input (415A). Both accept a 4-20mA pressure input. Wide range of flowmeter inputs Inputs from a wide range of flowmeters are accepted, including vortex, turbine, orifice plate, averaging pitot tubes, wedges and target flowmeters. Also, where two differential pressure transmitters are used across an orifice or similar device, to increase the measured flow range, both DP transmitter inputs are accepted and scaled separately with automatic crossover.

Gas & Steam Flow Computer Model 415 A scaled output, suitable for driving remote totalisers, is a standard feature. Options include an isolated 4-20mA retransmission, high and low flow alarms and an RS232/422 output which will operate on either the mass, corrected volume or energy outputs, depending on which value is programmed as the default display. RS232/422 output enables data logger operation The RS232/422 option will output all parameters displayed and has the unique ability to print flow rates and totals at programmable time intervals. This enables the 415 to function as a data...

2 line x 20 character (5.5mm high) alphanumeric backlit LCD. Keypad Sealed membrane keypad with four keys. Transducer Supply 8-24V dc field adjustable, 65mA max. Power Requirements dc Supply: 14 to 28V dc, 300mA typical (no options). ac Supply: ac mains set internally to 95-135V ac or 190-260V ac. Operating Temperature 0 to 55°C. Facia Sealing IP65 (Nema 4X) watertight. Approvals Electrical Interference Enclosure ETL (US) approved to UL508 and CSA. CE Compliance. CENELEC, FM, CSA and SAA approved enclosures available for hazardous areas. Both RS232 and RS422 are provided. (Note: When using...

Uses 1967 IFC Formulation (ASME) equations to calculate specific weight and enthalpy of steam. Types Saturated and Superheated. Temperature Range 20°C (68°F) to 800°C (1472°F) Uses NX-19 equation to calculate super compressibility Fpv. Temperature Range -40°C (-40°F) to 115°C (240°F). Pressure Range 101.325 kPa abs (14.69 psia) to 34,380 kPa abs (4985 psia). Specific Gravity Range 0.554 to 1.000. Carbon Dioxide 0 to 15% mole. Nitrogen 0 to 15% mole. 1 2 (RTD has a more limited range.) Pressure Range 1 kPa abs (1 psia) to 100,000 kPa abs (10,000 psia). When measuring saturated steam, it is...