Jon: The key benefit is its versatility, but it’s also simple to integrate, is data secure and fast to upgrade in the field.
What makes the AWT420 versatile is its use of interchangeable communications and sensor modules. This means the transmitter can be upgraded as required without having to purchase additional units. For communications it supports modules for HART, Profibus or Foundation Fieldbus and ABB’s digital EZLink. The sensors supported include the latest digital sensors from ABB for pH/ORP, dissolved oxygen and turbidity, as well as analogue sensors for the same parameters including conductivity.
The transmitter’s dual channel design means users can opt for either analogue or digital sensors or a mixture of the two, providing the convenience and associated cost savings of using a single device for multiple measurements. Integrated PID also enables the transmitter to provide direct or reverse acting control. In pH applications, this function can also be used to provide dual acid/base control.
- Easy to use and to set up
Each pluggable module is factory-calibrated and can be removed and exchanged via the transmitter’s hinged door, allowing fast upgrading in the field. The transmitter has an intuitive interface, with easy navigation and Windows™-style scrolling menus, so it’s simple to set-up and use. The one-button calibration routine also eliminates the need for specialist commissioning expertise.
The AWT420 incorporates lots of features enabling quick and easy access to measurement, diagnostic and audit data. The full-colour TFT display means sensor data can be quickly located and viewed in-situ via the device’s display or saved onto an internal SD card for analysis using ABB’s DataManager Pro tool. The inclusion of BluetoothTM technology also enables operators to obtain up-to-the-minute information and technical support via a smartphone using ABB’s EZLink connect app. Through the app, users can access sensor information, maintain and support documentation and proactively manage sensors remotely.