1. High Accuracy Lab in the Private Sector Doug Cooper

2. Goals  To provide a review of time proven design concepts that can be applied to commercial grade metrology labs.  Demonstrate how these same concepts were applied to the High Accuracy Lab built for a private sector company.

3.  Specifications  Architectural Design  Mechanical Design  Control System  Certification Test Data  NCSLI Facilities Committee Contents

4. Specification  Temperature 20 º C to 24 º C Selectable  Stability *Fluctuations in measurement volume ± 0.01º C *Fluctuations in the lab ± 0.05º C  Lab Gradient 0.025º C/M  Humidity 45% RH ± 1% RH  Air velocity 0.17 M/Sec (33 FT/Minute) Maximum  Cleanliness Class 1,000  Acoustics NC 30  Inertia Block Temperature 20º C to 24º C Selectable ± 0.1º C

5. 20.164°C 19.836°C 20.090°C 19.910°C 20.138°C 19.863°C 20.000°C GRADIENTS = 0.025°C/M HORIZANTAL TEMPERATURE GRADIENTS

6. 20.164°C 19.836°C 20.072°C 19.927°C 20.138°C 19.863°C 20.000°C GRADIENTS = 0.025°C/M VERTICAL TEMPERATURE GRADIENTS

7. Architecture  Pressurized Plenum  Return Air Wall System  Perforated Ceiling  The High Accuracy Lab Design  Lighting

8. Insulated Wall False Wall Insulated Roof Pressurized Plenum Perforated Ceiling Light Supply Duct Return Duct Typical Architectural Design Concept

10. Good Lab design provides an almost continuous return air extraction without the use of grills. This design insures even air distribution throughout the entire volume of the lab and greater flexibility as user needs change over time. Insulated Wall Return Air Chase False Wall

12. PLAN VIEW

13. SECTION VIEW

16. Mechanical system  Air Handler Architecture  Refrigeration System  Filtration  Inertia Block System

17. Make up air Return air Pre filters Cooling coil Air by-pass architecture Reheat coils Fan Humidifier HEPA filters in supply duct AIR HANDLING UNIT ARCHITECTURE

21.  Air Handler Sensors  Lab Sensors  Lab Sensor Installation  Documentation Controls

22. AIR HANDLING UNIT CONTROL SYSTEM ARCHITECTURE

23. Room Sensor Locations

26. Certification  Temperature  Humidity  Air Velocity  Cleanliness  Acoustics  Lab Recovery time  Lighting  Pressure

27. =TEST SENSOR

28. This graph depicts individual test sensor stability and gradients of approximately.015 C. over an 8 hour period, which meets the gradient specification.

29. This graph depicts individual test sensor stability and gradients of less than.02 C. over an 8 hour period, which meets the gradient specification

30. This graph depicts the temperature stability at test sensor 04 of 0.005 C. over an 8 hour period, which meets test stability specifications.

31. This graph depicts the average of all test temperature sensors of.005 C. over an 8 hour period.

32. Room Sensor Locations

33. This graph depicts room sensor stability and room gradients of.05 C. over an 8 hour period, which meets the room gradient specification.

34. This graph depicts room sensor stability and room gradients of.08 C over an 8 hour period, which meets room gradient specifications.

35. This graph depicts room sensor 5 temperature stability at.01 C over an 8 hour period, which meets specification for stability.

36. This graph depicts the average of all room temperature sensors over an 8 hour period at.005 C.

37. Conclusions  Room sensors are.08º C warmer than test sensor. All sensors including instrument sensors were calibrated at the same time in a bath before the next test.  Stability specifications were achieved.  Gradient specifications were exceeded.  Acoustic specification was less than NC 30 at 80% fan speed and NC 35 at 100% fan speed at 55% to 2k hz octave bands.  All other test procedures meet specification.

38. Facilities Committee  New RP for Testing Metrology Labs  Update RP 14  Meeting – Tuesday 4:15 to 6:00, Room 150B