ABB TB84PH2000120 pH/ORP Transmitter

Description

ABB TB84PH2000120 pH/ORP Transmitter

The ABB TB84PH2000120 belongs to the high-performance TB84PH Advantage Series family. It is an advanced, microprocessor-based 4-wire pH / ORP / pIon (Specific Ion) transmitter. It is widely used in analytical liquid processing environments to deliver highly precise water chemistry measurements.

The full model code breakdown (TB84PH-2-0-0-0-1-2-0) specifies structural and technical options, including its enclosure style, power supply, and standard programming functions.

Product Detailed Description

The TB84PH transmitter acts as the smart interface between electrochemical sensors (pH, Oxidation-Reduction Potential, or selective ion electrodes) and overarching control networks (such as a DCS or PLC).

Equipped with smart key menus and a highly visible backlit multi-variable display, this 4-wire analyzer performs real-time continuous sensor diagnostics. When paired with ABB’s Next Step Advantage sensors with a solution ground, it actively monitors the integrity and health of the reference and measuring electrodes.

Technical Parameters

Product Advantages

• Online Continuous Sensor Diagnostics: The module constantly monitors glass impedance and reference impedance. It can identify a cracked glass electrode or a fouled reference junction before it corrupts process data.
• Smart Key Interface: Eliminates the need for specialized software or remote configurators for routine calibration. The front panel layout uses tactile keys with text guides for step-by-step navigation.
• Output Hold Functionality: During a 2-point calibration or sensor cleaning, the transmitter can hold all analog and relay outputs to a pre-selected value, preventing false alarms or unintended chemical dosing in the plant.
• Dual Isolated Outputs: Allows you to dedicate Output 1 to the Primary Variable (pH/ORP) while mapping Output 2 to process temperature or a diagnostic signal.
• Ruggedized Enclosure: The robust NEMA 4X aluminum housing stands up to harsh, corrosive, and outdoor chemical processing environments.

Important Considerations & Precautions

• Sensor Shielding & Grounding: To minimize electromagnetic interference (RFI/EMI), ensure that the sensor cables run through isolated conduits and that shield wires are properly terminated to the designated terminal block pins.
• Damping Settings: If your chemical dosing loop suffers from high process noise or rapid fluctuations, utilize the transmitter’s adjustable software damping to stabilize output tracking.
• Solution Temperature Matching: For highly precise chemical tracking (especially at high or low pH limits), ensure that the solution-specific temperature compensation coefficient matches your process stream chemistry.
• High-Voltage Isolation: Always disconnect the main AC supply before opening the wiring terminal compartment to avoid electrical shock or component short-circuits.

Product Applications

The TB84PH2000120 is extensively utilized across heavy industrial water treatment and chemical loops:

• Wastewater Neutralization: Controlling acid/base dosing valves to neutralize plant effluent prior to discharge.
• Chemical & Refining Plants: Monitoring process streams, cooling tower water parameters, and scrubbing liquid loop status.
• Pulp & Paper: Regulating pH levels in bleaching and stock preparation lines.
• Power Generation: High-purity water tracking for boiler feed-water loops and condensate systems.
• Municipal Water Plants: Standard monitoring of drinking water treatment and chlorination feedback controls.

Shipping Port: Xiamen, China

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