917 X Display Temperature Offset Michael Chai Levi
- Slides: 5
917 X Display Temperature Offset Michael Chai Levi Haupt Chris Roberts 1 11/25/2020 Company Confidential
Introduction Problem: • Depending on selection of probe temperature difference between reference probe and display is generated. Objective: • Develop method to reduce temperature difference between reference probe and display probe. 2 11/25/2020 Company Confidential
Thermal Circuit R 1 Conduction through block K of Block 175 Ddisplayto. IDblock R 2 0. 0889 0. 000508 Convection of air gap between block and insert 4. 23 E-05 Thermal Conductivity of air (Kair) R 3 DIDblockto. ODinsert 0. 0022098 Conduction through insert K of Insert DODinsert. IDinsert R 4 0. 0022098 Convection of air gap between insert and probe Conduction through probe 0. 00635 25 DODprobe. IDprobe 0. 000254 Thermal Conductivity of air (Kair) 4. 23 E-05 2. 75 E+00 DIDprobe. Platinum 0. 0000254 RTotal 4. 82 E-01 q. Total 1 TDisplay 149. 5189 3 11/25/2020 Display Probe 0. 00254 K of Probe Convection of air gap inside probe 4. 23 E-05 2. 75 E+00 DIisnert. ODprobe R 6 0. 386715 175 Thermal Conductivity of air (Kair) R 5 Reference Probe Company Confidential
Surface Contact Calculator Link to Calculator http: //cocoe. sourceforge. net/ Click on “The Project Page” 4 11/25/2020 Company Confidential
Results • Problem is too complex to use simplified thermal circuit (. 5 °C difference) • Experimentation needed for accurate results (Calibration) • Recommended Solution: Calibration for each insert orientation 5 11/25/2020 Company Confidential
