ProMinent DULCOMETER diaLog DACb Water Analysis Controller

Overview

The ProMinent DULCOMETER diaLog DACb is described by ProMinent as a compact all-rounder for water analysis. It closes the control loop between DULCOTEST sensors and ProMinent metering pumps, and its measuring and control channels can be configured individually, so one controller family covers industrial and process water, drinking water and swimming pool water. Each channel can be assigned any of the common measured variables, which the flyer lists as pH, ORP, chlorine, chlorine dioxide, chlorite, bromine, conductivity, peracetic acid, hydrogen peroxide, ozone, dissolved oxygen and fluoride.

Seven Star LLC supplies the ProMinent DULCOMETER diaLog DACb to water utilities, power and desalination plants, hospitality groups and industrial sites in the Sultanate of Oman and across the GCC. Engineering support in Muscat allows the measuring module, function package and fieldbus option to be confirmed against the sensors and pumps already installed, so a retrofit does not stall on a missing input card.

Control Principle of the ProMinent DULCOMETER diaLog DACb

A sensor connected to the controller delivers a signal that the DACb converts to a measured value, corrects for temperature or pH where required, and compares with the setpoint. A P or PID controller then drives a pulse-frequency output to a metering pump, a relay for a solenoid valve, or an analogue output. The ProMinent DULCOMETER diaLog DACb offers two or three bidirectional controls, so a single channel can dose acid and alkali to hold a pH value, while another channel handles disinfectant.

Interference variable processing allows simple control of water parameters in flowing water by feeding the flow signal into the control algorithm, either as a 0/4 to 20 mA signal or from a contact water meter at 1 to 500 Hz. The setpoint can also be adapted to changed process conditions by remote control with the mA signal of a PLC, or through the fieldbus option for more demanding requirements. Time-based monitoring of control variables helps avoid incorrect metering.

Engineering Design of the ProMinent DULCOMETER diaLog DACb

The ProMinent DULCOMETER diaLog DACb uses a combination housing of PC with flameproofing equipment, measuring 250 x 220 x 122 mm and weighing 1.3 kg. It can be mounted on a wall, on a pillar or in a control panel, with IP 66 and IP 67 (NEMA 4X) protection when wall-mounted and IP 54 at a control cabinet door. Ambient temperature is 0 to 50 °C, and CE and MET approvals are stated, the latter corresponding to UL as per IEC 61010.

Measuring is organised in modules: module VA provides one mV/temperature input and one mA sensor input, module AA two mA inputs, module VV two mV/temperature inputs, and module L3 two conductivity and temperature inputs. Function packages 2, 3 and 4 add a third measuring and control channel, a third analogue output and additional digital inputs. Software functions can be upgraded later with an activation key or firmware update, and the controller is LAN-capable with an integrated web server for remote access.

Key Features of the ProMinent DULCOMETER diaLog DACb

The manufacturer highlights these benefits for the ProMinent DULCOMETER diaLog DACb.

• Two measuring and control channels are included in the basic configuration, with a third available through the function packages.
• All common measured variables can be set per channel and changed later, which protects investment when process conditions change.
• Ethernet connectivity with an integrated web server provides control from anywhere, and field bus options include PROFIBUS DP, Modbus RTU and PROFINET.
• Adjustable operating states, such as day and night mode, allow the controller to be tuned to different process situations.
• Four digital inputs handle sample water fault detection, level switches, pause and parameter-set switch-over.
• Two analogue outputs of 0/4 to 20 mA, two pulse-frequency outputs and two programmable relays are available as standard.
• A 24 V DC protective low voltage supply is possible, for example by means of a solar system or in the wet area of waterworks.
• Calibration and event data are logged, parameter sets can be saved and transferred on an SD card, and 24 operating languages are available.

Industrial Applications

The manufacturer lists measurement and control of water parameters in industrial and process water plants, monitoring of potable water, measurement of pH and disinfection parameters in food and beverage, hygiene parameters in swimming pools, and monitoring of chlorine dioxide in legionella control systems for schools, hotels and hospitals. Cooling water treatment in energy generation and in data centres is also described by ProMinent as a field where its dosing and analysis technology is used.

For Oman and the wider Gulf these roles correspond to potable water booster stations, reverse osmosis permeate monitoring, district cooling circuits, hotel and resort water systems, and effluent neutralisation at industrial estates. Seven Star LLC supplies the ProMinent DULCOMETER diaLog DACb with sensors and metering pumps from the same programme, backed by engineering support in Muscat.

Technical Specifications

The table lists published values for the ProMinent DULCOMETER diaLog DACb; the exact measured variables depend on the measuring modules and function packages ordered.

Request a Quote for ProMinent DULCOMETER diaLog DACb

To request a quotation for the ProMinent DULCOMETER diaLog DACb, send the Seven Star LLC instrumentation team your measured variables, sensor types, pump models and fieldbus requirement. We will confirm the measuring modules and function packages, advise on stock and lead time for Oman and the GCC, and provide the product flyer with technical data. Related analysers such as the Rosemount 499ACL free chlorine sensor, the ABB AWT pH/ORP transmitter and the ABB AW401 residual chlorine monitor can be quoted alongside it.