The IEM server resides in a room that is climate controlled by a dedicated heat exchanger. This page presents daily plots of logged temperatures. There are four one-wire sensors measuring ambient temperature. The arrangement of these sensors has changed over the years. The current temperature observation points are:

  • In Air Handler: Located at 5 feet above the floor at the intake of the heat exchanger.
  • Out Air Handler: Located below the sub floor where the cooled air departs the heat exchanger.
  • In Rack: Located on the front door of the rack at about 1 meter height.
  • Out Rack: Located at the back of the rack at about 1 meter height.

Note that the archive begins 24 Jul 2003.

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Time Series

Interesting Data Traces

  • 16 May 2008
    Agronomy building looses chilled water supply, the heat exchanger later gets backed up on local 'cooler' water.
  • 14 Jun 2010
    ISU Campus takes a power bump knocking out various utilities.
  • 11 Aug 2010
    Flooding impacts ISU campus and the chilled water is shut off for a while.
  • 24 Jun 2013
    Chilled water is turned off for an hour to check metering.
  • 9 Aug 2016
    Fan bracket is repaired on heat exchanger.