Do Not Wait for an Alarm or Failure Give your Data Center a "Health Check" using a simple hand held Infra Red (IR) Gun. This tool can provide early warning for electrical breaker overload, CRAC unit calibration issues, server air supply stratification, source of CRAC short-cycling. See the image below and use the number references for legend. The cost of the tool is between $100 and $500 the higher priced guns are recommended for the multiple features


1. Check temperature range of breakers

Check panel cover for ambient temperature, then breaker temperature range. Look for outliers hot and cold. Hot could be loose wire or overloaded circuit.

2. Check under floor for poor air flow

Floor tile temperature is a quick check for restricted air flow or range beyond CRAC.

3. Check actual temperature of delivered air (Supply air)

Concrete in front of CRAC should be around 55 degrees Fahrenheit.

4. Server in-take temperature on rack frame low

Rack frame at first server position compared to temperature at top of rack shows air temperature stratification or rack heating from conductive heat loads. Temperature range of 6 degrees is good. If more than 10 degrees, look for hot air mixing from above or behind servers. Max intake air temp greater than 90 degrees is a great risk to the server platform.

5. Server in-take (supply) temperature on rack frame high

Plus 6 to 10 degrees is the range from good to poor. (See note in 4 previous)

6. In-coming air (return air) temperature off sheet metal frame

Temperature in center of CRAC filter bank is a good indication of actual ambient mixed air returned to CRAC. Compare this temp with CRAC thermal readout for indication of short cycling or bad CRAC temp sensor.





See previous Blogs at

Data Center Toolbox for Power and Cooling

Data Center Toolbox \\"Watts per Square Foot of What\\"?

See Published articals at,289142,sid80_gci1275008,00.html;537667845;fp;4;fpid;51245




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New topics coming soon:

"Generic Data Center Racking, Cost and Space Benifits"

"Data Center Layer One and Structured Cabling Designs, Without Costly Patch Panel Installations"

"Server Power Cord Management"

"Humidity Management to "Humidify or Not Humidify"




The opinions, suggestions, management practices, room capacities, equipment placement, infrastructure capacity, power and cooling ratios are strictly the opinion and observations of the author and presenter.

The statements, conclusions, opinions, and practices shown or discussed do not in any way represent the endorsement or approval for use by Intel Corporation.

Use of any design practices or equipment discussed or identified in this presentation is at the risk of the user and should be reviewed by your own engineering staff or consultants prior to use.