Cooling Vents - Keithley 2651A Reference Manual

Model 2651A High Power System SourceMeter® Instrument Reference Manual

Cooling vents

The Model 2651A has top and side intake vents and a rear exhaust vent. Either the top or both side
intake vents, as well as the rear exhaust vent, must be unobstructed to properly dissipate heat. Do
not place a container of liquid (water or coffee for instance) on the top cover. If it spills, the liquid may
enter the case through the vents and cause severe damage.
Excessive heat could damage the Model 2651A and degrade its performance. The Model 2651A
must be operating in an environment where the ambient temperature does not exceed 50° C.
To prevent damaging heat build-up and ensure specified performance:
Either the top or both side intake vents, as well as the rear exhaust vent, must be kept free of any
obstructions. Even partial blockage could impair proper cooling.
DO NOT position any devices adjacent to the Model 2651A that force air (heated or unheated) toward
its cooling vents or surfaces. This additional airflow could compromise accuracy.
When rack mounting the Model 2651A, make sure there is adequate airflow around both sides to
ensure proper cooling. Adequate airflow enables air temperatures within approximately one inch of
the Model 2651A surfaces to remain within specified limits under all operating conditions.
Rack mounting high power dissipation equipment adjacent to the Model 2651A could cause
excessive heating to occur. To produce specified Model 2651A accuracies, maintain the specified
ambient temperature around the surfaces of the Model 2651A. Proper cooling practice, in rack
configurations with convection cooling only, places the hottest non-precision equipment (for example,
the power supply) at the top of the rack away from and above precision equipment (such as the
Model 2651A). Mount precision equipment as low as possible in the rack, where temperatures are
coolest. Adding space panels below the Model 2651A will help provide adequate airflow.
2651A-901-01 Rev. A / March 2011
CAUTION
Section 2: General operation
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