User manual

Toolbox 32 User Manual 1.47d www.cse-semaphore.com/mykingfisher
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Appendix - Calibrating RTU Modules
RT-1 Resistance Temperature Module
The RT-1 module is a resistance/temperature module designed to be used with up to four Pt100
resistance/temperature devices. These devices typically have a resistance of 100 ohms at 0 degrees Celsius
but tend to vary slightly in resistance value. The RT-1 module caters for these variances and for the
tolerances of its internal components by allowing the user to calibrate the module by setting two different
resistance / temperature setpoints. The hardware overview for this module is shown below.
Figure: Hardware Overview For The RT-1 Module
The RT-1 Module operates by scaling the resistance range of the Pt100 to the temperature range of -150 to
400ºC. Once the module is calibrated, it uses its complete 0-100% range (0-32760) to represent the
standard temperature range (-150 to 400ºC)
Calibrating The RT-1 Module
Each channel of the RT-1 module can be calibrated by selecting the channel calibration button in the
hardware overview. When the channel button is selected the window below is displayed.
Figure: RT-1 Channel Calibration Window