To: Edgar Castro

From: Jon Hagen

Date: June 4,1999

Subject: Weather Station

To get the weather instrumentation (wind, humidity, temperature, rain) back into operation, it seems that we should discard the special computer which is undocumented and not maintainable. The various sensors, however, are individually documented and seem to work. These sensors can be connected to a dedicated data-to-ethernet module such as the one used by Donna to monitor the compressors. It can then be connected to the same ethernet used for low speed monitor and control.

Meanwhile, the wind gage can be connected to a dedicated read-out unit in the control room.

This can use the weather station fiber link.

Upstairs: sine-wave to limiter to one-shot to fiber transmitter.

Downstairs: fiber to tachometer (op-amp filter) to digital panel meter. Include peak hold

circuitry (counter and dac).