Electronics and Firmware Redesign for PolyScience General Purpose Water Baths
25 Jul 2020
PolyScience has worked with DMC to develop custom control electronics and user interface for its General Purpose Water Bath upgrade.
The company’s popular General Purpose Water Bath was redesigned with modern features while maintaining the core functionality that has made it so successful. New features include a full-colour display with more comprehensive error handling and alarms and updated control electronics.
DMC designed the upgraded system around a Cortex-M0+ microcontroller. Open-source graphics library LittlevGL was used to efficiently operate the display. It can easily scale from large to small projects, enabling the creation of rich graphics. LittlevGL also provided many useful UI elements out-of-the-box that permitted rapid UI changes. Switching to a full-colour graphical display also gave the end customer multi-language support and a more intuitive interface for controlling and configuring the device.
The existing control algorithm was implemented to ensure the final product achieved the same reliability and performance while adding additional diagnostic and tuning capabilities for the future. DMC upgraded the control electronics to modern, widely available components and additional circuitry was added to enhance the way faults and alarms were displayed and handled.
Features of the redesigned General Purpose Water Bath include:
Simultaneous display of actual and setpoint temperature
Programmable presets for frequently used temperatures
Primary and automatic safety thermostats
Modern user interface with a full-colour display
Informative error messages and improved error handling
Support for multiple languages
Optimised design for modern features using low-cost components
Cost-optimised PCB design for volume production
STM32 Arm Cortex-M0+ microcontroller
Control of line-voltage AC loads
Full-colour TFT display
LittlevGL graphics library
For more information visit the Polyscience website HERE.