DQRID : D120214.2
Start DateStart TimeEnd DateEnd Time
07/29/2011065802/13/20122247
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Subject:
TWP/TSI/C2 - Control board failure
DataStreams:twptsiskyimageC2.a1, twptsicldmaskC2.a1, twptsiskycoverC2.b1, twptsimovieC2.a1
Description:
The indicated dome temperature and heat sink temperature were unreasonably high. The 
control board and serial adaptor were replaced and the instrument was shipped to Darwin for 
repair where the following was performed: 
- changed out 12V battery, 
- changed out faulty TT8 processor s/n 939476 with spare s/n 939476, 
- installed new model Lantronix EDS1100 serial to ethernet adapter,  
- modified board to adapter data connection to suit new adapter, 
- changed out two faulty temperature sensors (heatsink and dome), 
- changed out corroded heatsink fan and faulty wiring, 
- replaced damaged heater wiring, 
- removed corrosion and re-painted camera bracket, 
- waxed and polished dome mirror and whole instrument body.
Suggestions: 
Use only data in which the shadowband is properly masking the sun.
Measurements:twptsiskycoverC2.b1:
  • Pixel count: number total opaque(count.opaque)
  • Pixel count: number total in zenith circle(region.zenith.count)
  • Pixel count: number total in horizon area(region.horizon.count)
  • Pixel count: number opaque in horizon area(region.horizon.count.opaque)
  • Pixel count: number total thin(count.thin)
  • Pixel count: number total in sun circle(region.sun.count)
  • Pixel count: number opaque in sun circle(region.sun.count.opaque)
  • Pixel count: number opaque in zenith circle(region.zenith.count.opaque)
  • Pixel count: number below horizon in image(count.sub.horz)
  • Pixel count: number thin in horizon area(region.horizon.count.thin)
  • Pixel count: number total indeterminant(count.unknown)
  • Pixel count: number total in processed circle(count.sky)
  • Relative \'strength\' of direct sun(sun.strength)
  • Pixel count: number thin in zenith circle(region.zenith.count.thin)
  • Percentage thin cloud(percent.thin)
  • Pixel count: camera and sun strip mask(count.mask)
  • Pixel count: number total between horizon and processed circle(count.sub.proczen)
  • Pixel count: box, outside mirror area(count.box)
  • Sunshine meter(sunny)
  • Pixel count: number thin in sun circle(region.sun.count.thin)
  • Percent opaque cloud(percent.opaque)
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twptsimovieC2.a1:
  • (MPEG data stream - documentation not yet available)
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twptsiskyimageC2.a1:
  • null(JPEG data stream - documentation not yet available)
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twptsicldmaskC2.a1:
  • PNG data stream - documentation not supported(png)
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