Designing a Portable Data Acquisition Unit: Increasing Efficiency and Maximizing Productivity by Use of Standards Dustyn Iwamoto Home Institution: Honolulu.

Designing a Portable Data Acquisition Unit:Increasing Efficiency and Maximizing Productivity by

Use of Standards

Dustyn IwamotoHome Institution: Honolulu Community College

CfAO Akamai Internship 2007Advisor: Lucio Ramos

Subaru Telescope, NAOJ

Outline

• Background

• Special Considerations

• Main Problem

• Solution

• Implementation

• Questions?

Background

Project : Design a portable troubleshooting unit that can be used at the summit and base of operations.

Special Considerations

•Elevation and Temperature

•Almost 14,000 ft

•Below 10 degrees Celsius (50°F)

•Agilent Equipment Ratings

•10,000 ft

•23 Degrees Celsius (73.4°F)

Summit Base

•Benchmark (known good)

•Compare w/ faulty

•Normal operation

Main Problem

• Connector– No Standard– Durability– Secure Connection– Ease of use

Solution

• Mil-Spec 3111– Durable– Bayonet Lock– Variety of pin designs

Proposed Standard

• Mil-Spec 3111 connectors• Pros

– Durable, easy to use– Increased troubleshooting efficiency– One connector per module as opposed to 5 serial connectors

• Cons– Expensive to implement– Difficult to wire

ImplementationPin Color

Hi HH BlackLo GG BrownHi FF RedLo EE OrangeHi DD YellowLo CC GreenHi BB BlueLo AA PurpleHi z GreyLo y White

ChannelWire#1

1

2

3

4

5

Conclusion

• Built (1 of 2) portable data acquisition units

• Designed and proposed a standard that has been implemented at Subaru.

Acknowledgements

• Lucio Ramos– Mentor

• James & Ki’aina– System Adiministrators

• Jennifer Takaki• Subaru Staff

Funding provided through the Center for Adaptive Optics, a National Science Foundation Science and Technology Center (STC), AST-987683