Contrec 515 Add/Subtract Flow Computer (FA03)

Name: Contrec 515 Add/Subtract Flow Computer (FA03)
Brand: Contrec
SKU: 515–FA03
Availability: InStock

SKU: 515–FA03 Category: Digital Indicators Tag: Contrec 515 Series

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The Contrec Model 515 (Application FA03) is a high-accuracy, industrial-grade add/subtract flow computer engineered specifically for comprehensive energy measurement and thermal calculation loops. Tailored to handle dual-channel architectures, this advanced computing instrument performs precision addition or subtraction on two independent frequency or analog flow inputs to supply an accurate resultant rate and accumulative total. The system is perfectly suited for collecting re-transmitted signals from other field flow computers or interfacing directly with raw pulse and millivolt sensors. Housed in a ruggedized, weather-tight enclosure featuring a backlit LCD display and an alphanumeric front panel, it ensures secure local monitoring under harsh process plant conditions. With flexible freely assignable alarms, a software-adjustable 8-24V DC transducer power output, 4-20mA analog loop retransmission, and dual-port RS-232/RS-485 Modbus RTU serial communication, the Contrec 515 FA03 provides a highly integrated telemetry hub for large-scale industrial energy monitoring networks.

Key Product Features

Dual-Channel Energy Computation: Tailored for thermal units of measure, performing real-time mathematical addition or subtraction on two active flow channels.
Highly Adaptable Front-End: Programmable to accept a wide range of frequency signals (millivolt, reed switch, Namur proximity, open collector) or scaled analog signals with non-linear filtering.
Onboard Transducer Supply: Eliminates auxiliary field wiring by providing an adjustable 8-24V DC sensor excitation voltage directly accessible via front-panel controls.
Robust Audit Trail Logging: Features a built-in Real Time Clock (RTC) data logger capable of storing over 1,000 continuous entries of totals, rates, and diagnostic events.
Flexible Control Alarm Matrix: Equipped with freely assignable high or low level alarms and a programmable pulse output with scaling and customizable width resolution.

Data Logging Matrix: Real-Time Clock (RTC) event log memory block capturing over 1,000 entries for thorough audit tracking.

Contrec Model 515 FA03 Technical Specifications
● POWER SECTION
Power Supply Inputs	115 Vac ±15% standard (Optional: 230 Vac ±15% configuration) 12 to 28 Vdc external line loop power
Transducer Power Output	Adjustable 8 to 24 Vdc excitation output voltage regulated via software controls; maximum continuous current capacity up to 50mA.
Memory & Data Security	Non-volatile flash memory permanently preserves accumulative totals, hardware constants, and system configurations during full power blackouts.
● INPUT SECTION
Frequency Pulse Inputs	Two independent input channels supporting a 0Hz to 10kHz frequency range. Compatible Inputs: Millivolt signals, reed switches, Namur proximity sensors, and logic pulse trains.
Analog Loop Inputs	Two independent 4 to 20 mA active current loops. Signal Filtering: Configurable non-linear correction curves, linear scaling, and low-flow cutoff points.
Main Menu Variables	Default tracking parameters: Total 1 (MWh), Flowrate 1 (MW), Total 2 (MWh), Flowrate 2 (MW), Resulting Total (MWh), and Resulting Flowrate (MW).
● OUTPUT SECTION
Analog Loop Retransmission	Fully isolated 4 to 20 mA DC current loop retransmission output channel with programmable scaling.
Digital Pulse Retransmission	Open collector transistor output featuring software-defined volumetric scaling factor and adjustable pulse width duration.
Serial Infrastructure	RS-232 Port: Dedicated link optimized for direct PC terminal calibration or local ticket receipt printing. RS-485 Port (Optional): Multi-drop serial bus supporting robust long-distance plant networking. Supported Protocols: Modbus RTU, Ticket Printer, and Contrec command-line protocols.
Fascia Operator Interface	Backlit alphanumeric LCD screen showing real-time concurrent totals, differential energy results, user-programmed tags, and secondary language options.
● PERFORMANCE
Calculation Accuracy	Better than ±0.01% of reading for all internal mathematical energy equations.
Analog Transmittance Precision	Better than ±0.05% of full scale range under reference conditions.
● PHYSICAL
Mechanical Housing Layout	Molded field-mounting enclosure utilizing high-rigidity impact polymers (Optional flush panel mount, pipe track mount, or deployment within a heavy Ex410 explosion-proof housing).
Tactile Operator Array	Robust, weather-sealed elastomeric keyboard layout providing precise tactile user input feedback.
● STANDARDS CONFORMITY
Environmental Safeguarding	Standard IP65 weatherproof frontal fascia protection. *Note: Conformal PCB coating (Option C) is available to protect internal circuits from harsh humidity and ambient chemical corrosion.