9 March 2004 GIFTS Blackbody Subsystem Critical Design Review Temperature Uncertainty Budget and Calibration Fred Best 9 March 2004

9 March 2004 Slide 2 Temperature Error Budget

9 March 2004 Slide 3 Blackbody Section – Side View Enclosure Tube (Aluminum) Front Cover (Alum) Multi-layer Insulation (not shown) Cavity Support/ Insulator (Noryl) Electrical Connector Mounting Base (Noryl) Circumferental Heater Thermistors 4 Temperature Measurement 2 Redundant Temp Control 1 Overtemp Blackbody Cavity (Aluminum) Chemglaze Z306 Paint

9 March 2004 Slide 4 Blackbody Temperature Calibration Configuration

9 March 2004 Slide 5 GIFTS BB Calibration Scheme

9 March 2004 Slide 6 Blackbody Temperature Calibration The Blackbody and Controller will undergo end- to-end calibration. The temperature of the Blackbody and Controller can be independently controlled. Ambient Blackbody calibrated over the range from: -40 C to 0 C. Hot Blackbody calibrated over the range from: 0 C to +40 C. For calibration the Controller will be maintained at near 0 C. {The system will be calibrated at other Controller temperatures if a temperature dependence is discovered during EM-2 testing.

9 March 2004 Slide 7 Temperature Calibration Standard Absolute Temperature Calibration of end- to-end System at Hart has Uncertainty Of +/ K (k=2) Thermometrics SP-60 Probes (2) Hart 2563 Standard Thermistor Module Hart 2564 Thermistor Scanner Module Hart 3560 Extended Communications Module Calibration Computer