1. LBT Q1 2007 Engineering Review DAQ

2. 19-Apr-2007LBT Q1 2007 Engineering Review Housekeeping System Requirements Interface directly to the Agilent 34970A Interface directly to the Agilent 34970A Absolute accuracy better than 0.5° C Absolute accuracy better than 0.5° C Resolution better than 0.05°C Resolution better than 0.05°C Measurement range at least -25°C to +35°C Measurement range at least -25°C to +35°C Locations (symmetrical left and right) Locations (symmetrical left and right) C-ring extension, M3 swing arm height, front and rear C-ring extension, M3 swing arm height, front and rear C-ring extension, M2 swing arm height, front and rear C-ring extension, M2 swing arm height, front and rear Telescope rear counterweights on the C-ring outside Telescope rear counterweights on the C-ring outside

3. 19-Apr-2007LBT Q1 2007 Engineering Review Housekeeping System Basic Design RTD (Resistance Temperature Detector) RTD (Resistance Temperature Detector) 4-wire installation 4-wire installation

4. 19-Apr-2007LBT Q1 2007 Engineering Review Highlights (Q1/2007) Basic design finished Basic design finished Procured sensors for testing Procured sensors for testing Installed two test sensors Installed two test sensors Surface temperature Surface temperature Air temperature Air temperature Data collection and analysis begun Data collection and analysis begun

5. 19-Apr-2007LBT Q1 2007 Engineering Review

6. 19-Apr-2007LBT Q1 2007 Engineering Review

7. 19-Apr-2007LBT Q1 2007 Engineering Review

8. 19-Apr-2007LBT Q1 2007 Engineering Review

9. 19-Apr-2007LBT Q1 2007 Engineering Review Open Issues Technical Technical Signal noise Signal noise Shielding Shielding Sensor placement Sensor placement Fragile Fragile Avoid blocking access for maintenance Avoid blocking access for maintenance

10. 19-Apr-2007LBT Q1 2007 Engineering Review Open Issues Schedule Schedule Installation requires telescope access Installation requires telescope access Financial Financial None None Resource Resource Personnel for fabrication and installation Personnel for fabrication and installation

11. 19-Apr-2007LBT Q1 2007 Engineering Review Progress (Q1/2007) Completed basic design Completed basic design Testing Testing Installed surface temperature sensor Installed surface temperature sensor Collected two weeks of data Collected two weeks of data Installed air temperature sensor Installed air temperature sensor Currently collecting data Currently collecting data

12. 19-Apr-2007LBT Q1 2007 Engineering Review Planning (Q2/2007) Data Analysis Data Analysis Procurement of additional sensors Procurement of additional sensors Installation of additional sensors Installation of additional sensors