Foxboro 870ITEC-AYFNZ Electrodeless Conductivity Transmitter

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The Foxboro 870ITEC-AYFNZ is a 2-wire intelligent electrochemical transmitter engineered for continuous electrodeless conductivity and liquid concentration monitoring. Equipped with a 4–20 mA output, a 2-inch pipe mounting kit, and FM Class I, Div 2 nonincendive approvals, this unit processes signals from 871EC or 871FT toroidal sensors across harsh acid, caustic, and chemical solution streams.

Maintaining a 870ITEC-AYFNZ as a New Surplus capital spare eliminates multi-week factory lead times during severe chemical corrosion or electrical surge outages. Buying genuine New Surplus guarantees pristine internal signal conditioning electronics, uncompromised NEMA 4X door seals, and full sensor drive stability without the component fatigue risks found in secondhand or refurbished units.

870ITEC-AYFNZ

870ITEC-AYFNZ

Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

1. Verify the process area safety classification matches FM Class I, Division 2 limits before removing enclosure covers.
2. Wear an anti-static wrist strap connected to earth ground during field wiring.
3. Secure the 2-inch pipe mounting bracket (-Y option) to a rigid vertical or horizontal pipe using the supplied U-bolts.
4. Note down the configured cell factor (C_f), temperature compensation type, and concentration curve settings from the old transmitter.

Stage 2: Removal

1. Isolate loop power to the field transmitter and verify zero terminal voltage.
2. Open the hinged front enclosure door and disconnect the 2-wire loop power terminals and the multi-pin 871EC sensor cable connector.
3. Loosen the pipe mounting hardware and carefully remove the transmitter housing from the 2-inch pipe.

Stage 3: Installation (Clone & Seat)

1. Mount the replacement 870ITEC-AYFNZ enclosure onto the 2-inch pipe frame and torque mounting bolts securely.
2. Pass the loop power leads and 871EC sensor cable through the bottom conduit entries using NEMA 4X liquid-tight fittings.
3. Connect field wires to terminal lugs (observe correct polarity for the 4–20 mA loop) and plug in the sensor assembly.

Stage 4: Power-On & Testing

1. Apply 24 V DC loop power and confirm the LCD initializes displaying live measurement values.
2. Access the front keypad menu to verify or input cell constants, sensor type, and 4–20 mA range setpoints (0 mA and 100 mA scale points).
3. Perform a zero-calibration test in air or with a loop-check calibration resistor to validate 4–20 mA current loop accuracy back to the DCS.

Firmware/Software Versions & Upgrade Notes

• Configuration Interface: The -A model variant features a local human-machine interface (HMI) with display and keypad for full local configuration, calibration, and diagnostics.
• Compatibility Notice: The 870ITEC-AYFNZ requires electrodeless (toroidal) sensors (such as Foxboro 871EC or 871FT series). It is NOT compatible with contacting conductivity probes (871CC/871CR) or pH/ORP sensors (871PH). Ensure the software sensor selection matches the attached sensor cell geometry.
• Parameter Loss Prevention: Calibration and menu parameter settings are stored in non-volatile EEPROM memory. Power cycles will not erase calibration curves; however, writing incorrect cell factors during replacement will cause significant concentration measurement errors.

Frequently Asked Questions (FAQ)

What does the model code breakdown “870ITEC-AYFNZ” signify?

• 870ITEC: Intelligent Electrochemical Transmitter for Electrodeless Conductivity
• -A: Analog Output Only (Configurable 4–20 mA, No digital fieldbus)
• Y: Pipe Mounting Enclosure (DN 50 / 2-inch Pipe)
• FNZ: FM Nonincendive Approval (Class I, II, III; Division 2)

Is this Foxboro 870ITEC-AYFNZ transmitter genuine and completely unused?

Yes. We exclusively supply Brand New Surplus units in original factory packaging. These transmitters originate from cancelled plant expansion projects, carry zero installation marks, and undergo complete functional verification before shipment.

Why choose New Surplus over a cheaper refurbished transmitter?

Refurbished field transmitters often suffer from degraded internal power supply components and compromised environmental seals caused by long-term chemical vapor exposure. Investing 20% to 30% more in a New Surplus 870ITEC unit ensures full NEMA 4X enclosure integrity and 100% measurement accuracy in aggressive plant environments.

Can I calibrate this unit without specialized digital field communicators?

Yes. Model selection -A includes a built-in LCD display and front-panel keypad, allowing complete menu-driven calibration, cell factor adjustments, temperature compensation scaling, and diagnostic testing directly at the device without requiring external handheld configurators.

What electrodeless sensors can I connect to this unit?

The 870ITEC-AYFNZ interfaces directly with Foxboro 871EC and 871FT series electrodeless sensors. Pre-programmed chemical concentration curves (such as H_2SO_4, NaOH, HCl, NaCl) are built into the software for direct percent-concentration reporting.

What warranty is provided with this New Surplus transmitter?

All New Surplus Foxboro 870ITEC-AYFNZ transmitters include a full 1-year replacement warranty, verified serial numbers, and a complete pre-shipment Quality Control report.