1056-01-21-31-AN | Rosemount | 1056 Dual Channel Transmitter

The Rosemount 1056-01-21-31-AN is a sophisticated dual-channel multi-parameter transmitter designed for demanding liquid analysis. This specific configuration is optimized for Dual Toroidal Conductivity measurements, allowing for simultaneous monitoring of two separate process lines or the calculation of differential conductivity in high-concentration chemical applications.

Technical Specifications

Measurement Capability

• Toroidal (Inductive) Method: Ideal for high-conductivity liquids, slurries, or corrosive chemicals that would foul or coat standard contact electrodes.

• Dual Display: The large, high-contrast LCD displays both measurements simultaneously with user-defined units.

• Auto-Configuration: The transmitter automatically recognizes the measurement boards upon power-up.

Installation & Wiring Guidelines

• Mounting Options: The 1056 is versatile and can be mounted via panel-mount (1/2 DIN), pipe-mount, or surface-mount. Ensure the rear cable glands are tightened to maintain the NEMA 4X seal.

• Power Connection: This unit is configured for 01 (AC Power). Internal jumpers or terminal selection must be checked to match your local supply of 115 VAC or 230 VAC.

• Sensor Compatibility: This model requires Toroidal sensors (e.g., Rosemount 222, 225, or 228 series). Ensure the sensor cable is properly shielded and routed away from high-power VFD or motor cables.

• Analog Outputs: The dual 4-20 mA outputs are isolated. They can be mapped to represent Conductivity 1, Conductivity 2, or the temperature of either process.

Frequently Asked Questions (FAQs)

Why choose Toroidal conductivity over Contacting conductivity?

Toroidal sensors are "non-contacting." They use induction to measure conductivity, making them nearly maintenance-free in applications that involve heavy oils, fibrous slurries, or high-acid/base concentrations that would corrode standard sensors.

Does this model include alarm relays?

No. The "01" power option in this specific product code indicates "no relays." If your application requires local high/low alarm triggers, you must utilize the 4-20 mA signals to an external PLC or DCS, or select a different hardware configuration.

How do I calibrate the dual channels?

Calibration is performed through the front-panel membrane keypad. You can perform a "Zero" calibration in air and a "Standard" calibration using a solution of known conductivity or by comparing it to a grab sample.

Is the display visible in direct sunlight?

Yes, the 1056 features a high-contrast, black-on-white LCD that is designed for high visibility in both indoor industrial lighting and outdoor daylight conditions.