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.
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.
- 10 Apr 2019
Lightning strike knocks out chilled water and then power surge knocks out a few servers.