Rosemount 1056‑01‑22‑38‑AN Dual‑Input Liquid Analytical Transmitter, pH/ORP Measurement 4‑20mA HART Wall‑Mount Process Analyzer

Rosemount 1056‑01‑22‑38‑AN Dual‑Channel pH‑ORP Liquid Analytical Process Transmitter

Model Code Breakdown for Rosemount 1056‑01‑22‑38‑AN

Each segment within Rosemount 1056‑01‑22‑38‑AN defines hardware configuration, measurement function, communication type and enclosure options directly sourced from official datasheet coding rules. Every digit and suffix reflects factory‑configured hardware without field modification.

Segment‑by‑segment parameter decoding

• 1056: Base model, dual‑input liquid analytical transmitter platform

• ‑01: Power configuration, 115 V AC mains power supply variant

• ‑22: Measurement board selection, dedicated pH / ORP signal input board

• ‑38: Communication option, dual isolated 4‑20 mA analog outputs plus HART protocol support

• ‑AN: Enclosure and assembly option, standard polycarbonate wall‑mount housing without extra hazardous‑area certification

Rosemount 1056‑01‑22‑38‑AN ships pre‑configured for pH‑ORP loop deployment. No additional signal board installation is required after arrival at site.

Core Measurement Performance for Industrial Liquid Analysis

Rosemount 1056‑01‑22‑38‑AN executes continuous pH range 0‑14 and ORP range ‑1500 mV to +1500 mV acquisition from compatible field sensors. Measurement accuracy reaches ±0.01 pH and ±1 mV for ORP signals, meeting standard process control requirements for water‑based fluid monitoring.

Built‑in automatic buffer recognition simplifies on‑site calibration workflows. On‑board temperature compensation corrects reading drift across 0 °C to +55 °C operating ambient range. The unit accepts signals from Rosemount 396P, 389VP and other mainstream pH‑ORP probe families for plant‑wide instrument standardization.

Electrical Outputs and Field Communication Capabilities

The 4‑20 mA isolated current outputs from Rosemount 1056‑01‑22‑38‑AN transmit scaled process variables toward DCS or PLC control systems. Each output channel features galvanic isolation to suppress ground‑loop noise common within multi‑instrument field cabinets.

Superimposed HART digital signal enables remote parameter access via 475 field communicator. Plant technicians can retrieve diagnostic status, adjust alarm set‑points and review calibration history without physical access to transmitter keypad. Data‑logging memory stores historical measurement records for process audit and troubleshooting purposes.

Mechanical Housing and On‑Site Installation Conditions

Polycarbonate wall‑mount enclosure of Rosemount 1056‑01‑22‑38‑AN suits general‑purpose non‑hazardous indoor cabinet or wall mounting locations. Conduit openings accept standard 1/2‑inch or PG13.5 cable fittings for sealed field wiring entry.

Allowable ambient humidity spans 5 %‑95 % non‑condensing. Unit weight sits near 3 kg for easy wall‑bracket fitting. Local back‑lit colour LCD displays real‑time pH value, ORP reading and sensor temperature for on‑site operator visibility.

Target Industrial Applications & Key Selection Reasons

Application Scenarios: Municipal water purification plants, industrial wastewater discharge monitoring, chemical batch process loops, cooling‑water circulating systems and beverage manufacturing liquid quality control.

Why select Rosemount 1056‑01‑22‑38‑AN: Pre‑configured pH‑ORP board removes engineering workload for new loop build‑outs; combined 4‑20 mA plus HART supports both legacy analog control and modern smart instrument workflows; proven dual‑input hardware permits expansion for second analytical sensor later; standard wall‑mount package fits most general‑purpose automation cabinet layouts.