Honeywell 51196814-200 Differential Pressure Transmitter

Configured for precise gas pressure differential sensing in industrial control platforms, the Honeywell 51196814-200 (51196814-200 Differential Pressure Transmitter) provides direct physical/electrical execution of pressure-to-analog signal conversion.

Hardware Specifications

Process Control and DCS Instrumentation Characteristics

• 4-20 mA HART loop protocol: The transmitter interface is designed for integration into standard control loops, allowing for the transmission of primary pressure variables to DCS controllers like Experion PKS. It ensures that the current loop signal remains compliant with industry-standard HART communication requirements.
• Channel-to-channel isolation: The electrical design features isolation between the sensing element and the output termination, preventing ground-induced measurement drift. This isolation is necessary to maintain signal fidelity when transmitters are mounted on metallic structures at varying ground potentials.
• Cold junction compensation (CJC): While primarily a pressure device, the internal signal processing electronics are calibrated to maintain stability across the specified 0 to 50 deg C operating range, ensuring that ambient temperature fluctuations do not introduce errors in the pressure reading.
• FOUNDATION Fieldbus / Profibus PA connectivity: The unit serves as a high-precision node in automated process networks, providing deterministic updates of differential pressure values to the host controller interface for real-time flow and level monitoring.

Frequently Asked Questions

Q: Is this transmitter suitable for conductive or corrosive process media?

A: No. The 51196814-200 is rated exclusively for air, non-conductive, and non-corrosive gases. Exposure to liquids or aggressive chemical vapors will damage the sensing diaphragm and compromise the transmitter's accuracy and integrity.

Q: Can the transmitter be calibrated in the field?

A: Field calibration is supported via the device's pluggable terminal strip and compatible configuration tools. Ensure that the transmitter is isolated from process pressure before initiating any zero-point or span adjustments to avoid safety risks.

Field Installation Guidelines

• Mounting: Secure the transmitter to a vibration-free surface using the provided mounting holes. For flow applications, orient the device to prevent the accumulation of condensation in the pressure sensing ports.
• Grounding: Terminate the transmitter chassis to the cabinet earth bus to maintain the effectiveness of the IP65-rated polycarbonate enclosure and minimize electromagnetic noise coupling into the output signal.
• Wiring: Use shielded, twisted-pair cabling for the 4-20 mA output loop. Keep the cable runs separated from high-voltage AC or VFD cables by at least 150 mm to prevent inductive noise injection into the low-current measurement signal.