Emerson 1056-02-25-38-HT Liquid Analyzer Transmitter

1. Product Model Breakdown (Ordering Code)

The string 1056-02-25-38-HT specifies the exact hardware and software configuration of the unit:

2. Product Specifications

• Enclosure: Polycarbonate, NEMA 4X / IP65 (Weatherproof/Corrosion resistant).

• Display: Large, monochromatic graphic LCD with backlighting (128 x 96 pixels).

• Ambient Temperature: 0 to 55 °C (32 to 131 °F).

• Outputs: Dual 4-20 mA isolated outputs + HART digital signal.

• Relays: Four (4) SPDT alarm relays; rated at 5 Amps at 115/230 VAC.

• Dimensions: 155 x 155 x 131 mm (Standard 1/2 DIN cutout).

• Measurement Range (DO): 0 to 20 ppm (mg/L) or 0 to 250% saturation (sensor dependent).

3. Product Advantages

• Multi-Parameter Flexibility: Although configured for Dissolved Oxygen, the modular design allows for field-swapping of sensor boards (pH/ORP, Conductivity, Chlorine, etc.).

• Ease of Use: Features "Quick Start" programming and auto-recognition of sensor boards to reduce setup time.

• Smart Diagnostics: Provides continuous monitoring of sensor health and transmitter self-diagnostics.

• Advanced Display: A large, customizable screen allows the operator to view process variables and diagnostics at a glance.

• HART Communication: Enables remote configuration and easy integration into asset management systems (like AMS Device Manager).

4. Product Applications

This transmitter is widely used in industries requiring precise liquid quality control:

• Water & Wastewater: Aeration tanks (dissolved oxygen control), effluent monitoring.

• Power Industry: Boiler feed water monitoring.

• Chemical Processing: Reaction control and safety monitoring.

• Food & Beverage: Fermentation processes and Clean-in-Place (CIP) systems.

• Pharmaceuticals: Pure water monitoring and sterile fermentation.

5. Cautions & Maintenance (Notice)

• Power Supply: Ensure you are using 24 VDC power. Connecting this model (Code 02) to 110/220 VAC will cause permanent damage.

• Wiring: Use shielded twisted-pair wiring for 4-20mA signals to prevent electromagnetic interference.

• Sensor Calibration: Regular calibration of the Dissolved Oxygen sensor is required for accuracy, especially if the process temperature fluctuates significantly.

• Mounting: Ensure the panel gasket is correctly seated to maintain the IP65/NEMA 4X rating in wet environments.

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