1. 1 6/12/2015 Company Confidential 917X Display Temperature Offset Michael Chai Levi Haupt Chris Roberts

2. 2 6/12/2015 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.

3. 3 6/12/2015 Company Confidential Thermal Circuit Display Probe Reference Probe R1R1 Conduction through block 0.0889 K of Block175 D displaytoIDblock 0.000508 R2R2 Convection of air gap between block and insert4.23E-05 Thermal Conductivity of air (K air ) D IDblocktoODinsert 0.0022098 R3R3 Conduction through insert 0.386715 K of Insert175 D ODinsertIDinsert 0.0022098 R4R4 Convection of air gap between insert and probe4.23E-05 Thermal Conductivity of air (K air )2.75E+00 D IisnertODprobe 0.00254 R5R5 Conduction through probe 0.00635 K of Probe25 D ODprobeIDprobe 0.000254 R6R6 Convection of air gap inside probe 4.23E-05 Thermal Conductivity of air (K air )2.75E+00 D IDprobePlatinum 0.0000254 R Total 4.82E-01 q Total 1 T Display 149.5189

4. 4 6/12/2015 Company Confidential Surface Contact Calculator Link to Calculator http://cocoe.sourceforge.net/ Click on “The Project Page”

5. 5 6/12/2015 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