Foxboro 873RS-AIYFNZ-7 873RS Electrochemical Resistivity Analyzer
Manufacturer: Foxboro
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Part Number: 873RS-AIYFNZ-7
Condition：New with Original Package
Product Type: Electrochemical Analyzers
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Foxboro 873RS-AIYFNZ-7 873RS Electrochemical Resistivity Analyzer
The Foxboro 873RS-AIYFNZ-7, also cataloged as the 873RS Electrochemical Resistivity Analyzer, operates as a dedicated hardware component for continuous liquid resistivity measurement within ultrapure water monitoring systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 873RS-AIYFNZ-7 |
| Brand | Foxboro |
| Origin | USA |
| Weight | 4.5 kg |
| Dimensions | 350 x 260 x 180 mm |
| Operating Temp | -20 to +60 deg C |
| Power Consumption | 115/230 VAC line power, 50/60 Hz |
| Analyzer Type | Electrochemical Resistivity Analyzer |
| Measurement Range | 0.1 to 20 Mohm-cm |
| Signal Output | 4-20 mA DC |
| Display Type | Front-panel LCD |
| Enclosure Rating | NEMA 4X / IEC rated housing |
| Humidity Range | 5% to 95% RH non-condensing |
4-20 mA HART Loop Protocol and Channel-to-Channel Isolation
The Foxboro 873RS-AIYFNZ-7 converts low-level sensor potential inputs into standardized continuous signals, maintaining 4-20 mA HART loop protocol compatibility across supervisory control networks. Integrated automatic temperature compensation algorithm routines normalize raw sensor conductivity inputs to standard 25 deg C baselines. Built-in channel-to-channel isolation eliminates ground loop interference between field sensors and remote DCS receiver cards, preserving high-resolution analog signal transmission across high-impedance water treatment loops.
Frequently Asked Questions
Q: How does the internal temperature compensation function during ultrapure water monitoring?
A: The analyzer uses internal temperature compensation algorithms tied to sensor RTD inputs, normalizing raw resistance values to standard 25 deg C reference baselines across the 0.1 to 20 Mohm-cm span.
Q: What mechanisms protect the 4-20 mA DC analog output from plant electrical noise?
A: Built-in channel-to-channel isolation decouples the sensor input terminals from the 4-20 mA DC output loop, preventing ground loop potential differences between field sensors and control room I/O modules.
Q: How is primary AC operating voltage configured on the terminal assembly?
A: Internal transformer jumpers configure the unit for either 115 VAC or 230 VAC line power at 50/60 Hz, terminating at labeled power input screw terminals.
Field Installation Guidelines
- Enclosure Mounting: Secure the NEMA 4X housing into panel cutouts or onto vertical pipe stands using dedicated mounting hardware, providing sufficient clearance for enclosure door swing.
- Conduit Separation: Route high-voltage AC mains supply cables and 4-20 mA DC signal cables through independent conduit entries to prevent electromagnetic interference.
- Sensor Wiring Integrity: Wire two-electrode sensor leads directly to assigned terminal blocks, verifying that sensor cable shield wires connect cleanly to the enclosure earth ground bus bar.
- Grounding Protocols: Connect a low-impedance ground conductor from the primary protective earth lug to the plant master ground reference point before powering the device.