© National Instruments
|
2-3
Figure 2-2.
NI PXIe-1082DC Vents
Chassis Ambient Temperature Definition
The chassis fan control system uses intake air temperature as the input for controlling fan speeds
when in Auto Fan Speed mode. Because of this, the chassis ambient temperature is defined as
the temperature that exists just outside of the fan intake vents on the rear of the chassis. Note that
this temperature may be higher than ambient room temperature depending on the surrounding
equipment and/or blockages present. It is the user’s responsibility to ensure that this ambient
temperature does not exceed the rated ambient temperature as stated in Appendix A,
. If the temperature exceeds the stated spec the power switch LED will blink green,
Power Inhibit Switch LED Indicator
section of this chapter.
Setting Fan Speed
The fan-speed selector switch is on the rear panel of the NI PXIe-1082DC chassis. Refer to
Figure 1-2,
Rear View of the NI PXIe-1082DC Chassis
, to locate the fan-speed selector switch.
Select
High
for maximum cooling performance or
Auto
for improved acoustic performance.
When set to
Auto
, the fan speed is determined by chassis intake air temperature.
Rack Mounting
Rack mount applications require the optional rack mount kits available from National
Instruments. Refer to the instructions supplied with the rack mount kits to install your
NI PXIe-1082DC chassis in an instrument rack. Refer to Figure A-3,
.
1
Primary Air Exhaust Vent
2
Secondary Air Intake/Exhaust Vents
2
1
NI PXIe-1082DC
