Specifications: Model: DFA Digital Flow Analyzer Manufacturer: Fisher (Emerson) Enclosure Rating: Typically NEMA 4X (IP66/IP67 equivalent) for harsh environments. Ambient Temperature Range: Standard: -40° to 85°C (-40° to 185°F) Process Temperature Range: Dependent on sensor and primary element; can range from cryogenic to over 400°C (750°F). Process Pressure Range: Dependent on sensor and flange rating; commonly up to ANSI Class 600, 900, or 1500. Display: High-contrast, backlit LCD graphical display. Power Supply: Loop-Powered (for HART): 4-20 mA DC, typically 16-42 V DC. Line-Powered (for Fieldbus/PROFIBUS): As required by the specific communication protocol. Measurement Performance (Varies by Technology): Differential Pressure (DP) based models (with orifice plate, etc.): Accuracy: Typically ±0.5% to ±1.0% of rate, depending on the flow element and calibration. Turndown: Up to 10:1 with characterized DP flow elements. Magnetic (Mag) based models: Accuracy: Typically ±0.2% to ±0.5% of rate. Turndown: Can be as high as 1000:1. Vortex based models: Accuracy: Typically ±0.75% to ±1.0% of rate. Turndown: Typically up to 20:1. Inputs / Outputs: Primary Input: Signal from the integrated flow sensor (DP, frequency, etc.). Analog Inputs (Optional): For additional process variables like temperature and pressure for compensation. Communication: Standard: 4-20 mA HART (Loop-powered models). Digital Options: Foundation Fieldbus H1, PROFIBUS PA. Discrete Outputs (Optional): Can be used for alarms, batch control, or pulsing a totalizer. Discrete Inputs (Optional): For external reset or control commands.