ProMinent DULCOMETER diaLog C Single-Channel Water Controller

Overview

The ProMinent DULCOMETER diaLog C is a single-channel controller for water analysis that can work either as a transmitter or as a two-sided PID controller. In the second role it controls the measured variable in both directions, raising or lowering it to the setpoint, which is the classic requirement for pH correction with acid and alkali, and equally for disinfectant control where an overshoot has to be corrected. ProMinent positions it as an instrument for industrial and process water treatment and as a universal controller for all of its common measured variables, with a keypad operating concept and a multi-colour LED display.

Seven Star LLC supplies the ProMinent DULCOMETER diaLog C to water treatment contractors, utilities, hospitality operators and industrial plants in the Sultanate of Oman and the GCC. Quotations are prepared from Muscat with lead time confirmed, which helps maintenance teams who need a single-channel controller to replace or complement an existing dosing loop without redesigning the whole panel.

Control Principle of the ProMinent DULCOMETER diaLog C

The controller reads a sensor through an optional measuring module, takes into account the influence of temperature on the measurement, and compares the result with the setpoint. Temperature can be handled automatically through a temperature sensor or manually by entering a fixed value, which matters for variables that depend strongly on temperature. The ProMinent DULCOMETER diaLog C then drives two pulse-frequency outputs, so two metering pumps can be controlled at the same time, typically one for each direction of correction.

An interference variable such as flow can be added or multiplied into the control through a digital input. A typical example is pH control in flow neutralisation systems, where the dosing should follow the water flow rather than react only after the pH has drifted. The controller therefore responds dynamically to external influences and adjusts the dosing accordingly. The integrated output relay can be used as an alarm, a limit switch or to control motor-driven metering pumps or solenoid valves.

Engineering Design of the ProMinent DULCOMETER diaLog C

The ProMinent DULCOMETER diaLog C is housed in a combination housing that can be mounted on a wall or pillar with IP 66 and IP 67 protection, or installed in a control panel as a 1/4 DIN unit with IP 54. External dimensions are 164 x 164 x 128 mm. The operating temperature range is −10 to 60 °C, storage is −20 to 70 °C, relative humidity may reach 90 percent, and the stated maximum sound pressure level is 27 dB(A).

Inputs are modular: an optional measuring module supplies one mV and temperature input, one serial input or one mA input, and two contact inputs are galvanically isolated. Outputs comprise a power relay for 24 V DC to 230 V AC, an isolated 4 to 20 mA current output, two Optomos outputs and a digital output for the BAMa sensor bypass fitting. Supply is 100 to 240 V at 50/60 Hz with a power uptake of 14 W, and the communication interface is Modbus RTU.

Key Features of the ProMinent DULCOMETER diaLog C

The manufacturer lists these benefits, which describe the ProMinent DULCOMETER diaLog C in service.

• Precise control of one measured variable in both directions around a setpoint, with a P or PID characteristic.
• Two pulse-frequency outputs allow flexible, efficient metering with two pumps working together.
• Intelligent disturbance variable processing keeps the process stable when flow or load changes.
• A versatile output relay supports alarms, limit values and the control of motor-driven pumps or solenoid valves.
• A clearly structured multilingual menu allows commissioning and operation without prior technical knowledge.
• A calibration wizard guides the user through pH calibration step by step.
• Communication options simplify configuration, data transmission and remote maintenance.
• Wall, pillar and control-panel mounting make it adaptable to skids, cabinets and open plant rooms.

Industrial Applications

ProMinent describes the ProMinent DULCOMETER diaLog C for measurement and control of water parameters in treatment plants for industrial and process water, for monitoring individual parameters of drinking water, for hygiene parameters and for universal individual measurement and control of all common ProMinent measured variables. Low-turbidity measurement with the DULCOEYE LT sensor is also listed among the intended uses.

In practice, a single-channel two-sided controller suits skid-mounted pH neutralisation at industrial effluent stations, final chlorine control on potable water lines, and permeate or process water checks in plants around Sohar, Salalah and Muscat. Seven Star LLC supplies the controller together with the matching ProMinent sensors and dosing pumps, supported by engineering assistance in Muscat.

Technical Specifications

The table gives the published data for the ProMinent DULCOMETER diaLog C; sensor and measuring-module choices determine the measured variables available.

Request a Quote for ProMinent DULCOMETER diaLog C

To request a quotation for the ProMinent DULCOMETER diaLog C, send the Seven Star LLC instrumentation team your measured variable, sensor type, pump models and installation style. We will confirm the measuring module, advise on stock and lead time for Oman and the GCC, and provide the product flyer with technical data. Neighbouring instruments such as the ABB AX430 conductivity transmitter, the ABB AWT pH/ORP transmitter and the Applied Analytics OMA chlorine analyzer can be quoted in the same enquiry.