Programmable temperature controller targets medical diagnostic equipment

April 13, 2016 // By Julien Happich
Laird's SR-54 bi-polar programmable temperature controller can be incorporated into a thermoelectric assembly (TEA) to add integrated, customizable and precise temperature control for medical diagnostic equipment.

Temperature stability is vital in medical diagnostic equipment including ultrasound, MRI, PET, CT, and X-ray machines. Even small fluctuations in the operating temperature of these machines can significantly affect the image quality and resolution. Likewise, analytical instruments such as spectrometers, particle analysers and chromatography equipment can produce flawed data when operating outside operating temperature ranges.
The bi-directional SR-54 Series is microcontroller based device with built-in monitoring and closed loop feedback control intelligence.

It can easily be programmed to identify a problematic fan, thermoelectric module, over-temperature thermostat and temperature sensor failure, all of which are critical to maximizing medical and lab equipment uptime. The controller can accommodate up to three NTC thermistors and can control temperature to within ± 0.15°C under steady state conditions. Input power accommodates a supply voltage ranging from 16 to 60 VDC and output power supports TEMs and three DC fans with a maximum available current of 20A. Additional outputs provide an LED feature that displays the health of the TEA.

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