© National Instruments Corporation 25 NI Digital Multimeters Getting Started Guide
Appendix B: Chassis Recommendations and System Considerations
This appendix specifies the recommended chassis components and conditions for a system that includes
National Instruments DMMs.
PXI Chassis Recommendations
The NI PXI-4060/4065 and NI PXI-407x are designed to operate in any PXI-compliant chassis.
Temperature on these DMMs can vary with slot position in the chassis. Complete the following
recommendations to minimize this temperature variation and ensure normal operating conditions for
these DMMs:
• Perform routine maintenance of the chassis cooling fan filters, including cleaning. Such
maintenance ensures continuous cooling effectiveness, keeps dust off the components of the PXI
DMMs, and ensures accurate high-resistance measurements. NI recommends cleaning the chassis
fan filters at a maximum interval of six months and keeping the chassis environment clean to
minimize dust that enters the chassis. For more information about cleaning the chassis fan filters,
refer to your chassis documentation.
• Install PXI filler panels in all empty slots.
• Verify the PXI chassis fans that provide forced air remain unobstructed and can allow for proper
cooling of the PXI chassis, devices, and controller.
PXI Express Chassis
Some PXI Express chassis provide hybrid slots. A hybrid slot can accept either PXI Express modules
or PXI Express compatible modules, but not standard PXI modules.
To determine if your chassis contains hybrid slots, refer to your chassis documentation. For more
information about hybrid slots, visit
ni.com/support, and enter PXI Express FAQ in the Search
field.
Refer to the PXI Express Compatibility section of the NI Digital Multimeters Help, located at Start»
All Programs»National Instruments»NI-DMM»Documentation»NI Digital Multimeters Help,
to determine if your DMM is PXI or PXI Express compatible and for more information about
PXI Express compatibility.
PCI Chassis Recommendations
The NI PCI-4060, NI PCI-4065, and NI PCI-4070 are designed to operate in any ATX-compliant
industrial or personal computer. Complete the following recommendations to ensure normal operating
conditions for these DMMs:
Caution For optimal electromagnetic compatibility (EMC) performance and input protection,
you must install the front panel screw.
• Verify the PCI front panel brackets on the NI PCI-4060, NI PCI-4065, and NI PCI-4070 have
a firm, direct, metal-to-metal mounting connection for proper grounding. Some computer
manufacturers use a securing lever made of plastic; such a lever is unacceptable for safety reasons,
and you must remove it. Also, you must screw down the PCI devices. If the computer chassis does
not allow you to meet these requirements, you must use a different computer chassis.
• Install all covers for the industrial chassis or personal computer.
• Install PCI filler panels in all unused PCI slots.
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