DT300Series

Density Transmitters - Technology

Functional Description

Accuracy ±0.0004 g/cm³ (±0.1 °Brix);
Temperature compensation;
Range 0 g/cm³ - 10 g/cm³;
Standard industrial and sanitary process connection;
Digital LCD indicator;
Direct density or concentration readout in engineering units such as g/cm³, kg/m3, Specific Gravity, °Brix, °Baume, °Plato, °INPM, °GL, °API, % Solids, % Concentration, etc;
Suitable for dynamic and static liquids;
Two wire loop powered;
Several different wetted materials;
Single integrated unit without moving parts;
Factory calibration and Self calibration;
In field re-calibration:
- No standard reference required;
- No lab calibration required;
- No process shutdown.
Continuous/Self diagnostics;
Weather proof, explosion proof and intrinsically safe;
The control strategy is built from direct instantiation and deletion of function blocks;
Configuration and Parameterization all through open and interoperable configuration tools available in the market, e.g., based on PC or PCMCIA Cards or operations by the local adjustment switches (should be used with a LCD display);
Use of the Analog Input function;
Totally digital; including sensor, electronics and communication;
Configurable Local Adjustment (Foundation fieldbusTM and PROFIBUS PA);
Easy firmware upgrade (via Flash Memory Interface) for Foundation fieldbusTM and PROFIBUS PA;
Easy maintenance;
Three technology options: HART®, Foundation fieldbusTM, PROFIBUS PA.

DT301 - HART^® - 4 a 20 mA

Multi-drop operation mode;
Supports DTM and EDDL.

DT302 - Foundation fieldbus™

17 different types of function blocks for control strategies and advanced diagnostics;
Up to 20 function blocks;
Two analog inputs: density and concentration or temperature;
Execution of up to 31 external links (19 Publisher and 12 Subscriber);
12 mA consumption;
Dynamic block instantiation improves interchangeability;
Foundation fieldbusTM registered and ITK approved;
MVC (Multivariable Container) enabled.

DT303 - PROFIBUS PA

12mA consumption;
Three Function blocks for analog inputs: density, concentration and temperature;
Integrated to Simatic PDM;
Supports DTM and EDDL;
Profile 3.0 improves interchangeability.

The DT300 Series Intelligent Density Transmitter is an instrument developed for the continuous, online measurement of liquid density and concentration, directly in the industrial process.

Its pioneer technology consists of a capacitive type differential pressure sensor coupled to a pair of pressure repeaters immersed in the process. A temperature sensor located between the two pressure repeaters is used to compensate the temperature variations in the process fluid.

A dedicated software, by means of an algorithm, calculates the fluid density.

Depending on the industrial process, density may be expressed in g/cm3, Kg/m3, lb/ft3, Specific Gravity, Brix degree, Gay-Lussac degree, Baumé degree, Plato degree, INPM degree, API degree, Solids %, Concentration %, etc.

Designed for process control applications, these 2-wire transmitters generate a signal proportional to the concentration/density. Digital communication for remote calibration and monitoring is also provided.

Block Diagram

DT300 Series are available in three different technologies: HART® (DT301), Foundation fieldbusTM (DT302) and PROFIBUS PA (DT303). These instruments can be configured with Smar software and other manufacturers’ configuration tools.

Local adjustment is available in DT302 and DT303. For these models is possible to configure concentration adjust, self-calibration, direct density or concentration readout in engineering units and other control functions using the magnetic screwdriver. Smar has developed Asset View, which is a user-friendly Web Tool that can be accessed anywhere and anytime using an Internet browser. It is designed for management and diagnostics of field devices to ensure reactive, preventive, predictive and proactive maintenance.

DT301 (HART® protocol) can be configured by:

HI331 BLUETOOTH for android devices (App DEVCODROID) and Windows PC;
Other manufacturers' configuration tools based on DD (Device Description) or DTM (Device Type Manager).

DT302 utilizes the Foundation fieldbusTM H1 protocol, an open technology that allows any H1 enabled configuration tool to configure this device.
Syscon302 (System Configuration Tool) is a software tool used to configure, maintain and operate the field devices. Syscon offers efficient and friendly interaction with the user, using Windows NT version 4.0 or later, Windows 2000 and Windows XP.

Configuration tools such as AMSTM and HHT375 can configure DT302 devices. DD (Device Description) and CF (Capability File) files can be downloaded at either the Smar or Fieldbus Foundation website.
DT302 supports complex strategies configurations due to the high capacity and variety of dynamic instantiable function blocks.

Seventeen different types of function blocks are supported, and up to 20 function blocks can be running simultaneously. Maintenance procedures with Asset View diagnostics and status information from Foundation fieldbusTM result in a safer plant with longer availability.

DT303 (PROFIBUS PA protocol) can be configured using Simatic PDM and by the FDT (Field Device Tool) and DTM (Device Type Manager) concept tools, such as FieldCareTM and PACTwareTM. It can also be integrated by any PROFIBUS System using the GSD file.

PROFIBUS PA also has quality and diagnostic information, improving plant management and maintenance.