Cooling Vents - Tektronix Keithley 2651A Reference Manual

Section 2: General operation
10. OUTPUT connector (40 V, 50 A maximum)

Cooling vents

The Model 2651A has top and side intake vents and a rear exhaust vent. The rear exhaust vent and
either the top or both side intake vents must be unobstructed to properly dissipate heat.
Excessive heat could damage the Model 2651A and degrade its performance. Only operate the
Model 2651A in an environment where the ambient temperature does not exceed 50 °C.
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.
To prevent damaging heat build-up and ensure specified performance, use the
following guidelines.
The rear exhaust vent and either the top or both side intake vents must be unobstructed to
properly dissipate heat. 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.
If high power dissipation equipment is rack mounted next to the Model 2651A, it could cause
excessive heating. To produce specified Model 2651A accuracies, maintain the specified
ambient temperature around the surfaces of the Model 2651A. In rack configurations with
convection cooling only, proper cooling practice 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.
You can add space panels above and below the Model 2651A to help provide adequate
airflow.
2-8
Model 2651A High Power System SourceMeter® Instrument Reference Manual
This connector provides HI/LO connection points for currents. Connections are
as follows:
LO = Input/Output LO
HI = Input/Output HI
2651A-901-01 Rev. C October 2021