NI Digital Multimeters Getting Started Guide
26
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Additional Recommendations for the NI PCI-4070
The cooling capability of most industrial and personal computers is less than the cooling capability of a
PXI chassis. The NI PCI-4060 and the NI PCI/PCIe-4065 dissipate low enough power that additional
cooling is not needed in most computers. The NI PCI-4070 dissipates higher power, and NI strongly
recommends NI PCI-4070 users implement the following precautions to maximize the cooling
capability of the computer:
•
Install an additional 80 mm, 32 cubic ft/min (CFM) fan that forces air towards the NI PCI-4070.
Most computer chassis contain one or two mounting locations for this type of fan. These fans are
inexpensive and readily available at most computer supply stores.
Note
If the hard drive mounts vertically in front of the fan mounting location(s) in the computer
chassis, you must move the hard drive to a horizontal 3.5 in. drive bay or to another suitable location
that does not obstruct the fan mounting location(s).
•
Add additional fans, such as PCI fan cards and chassis fans, to increase the air circulation inside
the computer.
USB System Considerations
The NI USB-4065 conforms to USB 2.0 specifications and is 1.1 compliant. The NI USB-4065 is a high
powered USB device that supports both Hi-Speed and full-speed USB protocol. For more information
about power requirements, refer to the
NI 4065 Specifications
.
Appendix C: Fuse Replacement
This appendix explains how to replace the fuse in the NI 4060, NI 4065, NI 407
x
, and
NI CSM-10A/200mA.
Caution
For protection against fire, replace the fuse only with fuses of the same type and rating.
Refer to Table 1 for fuse types.
Note
The NI 4050 does
not
have a user-replacable fuse.
Table 1.
Appropriate Fuses for the NI 4060, NI 4065, NI 407
x,
and Current Shunt Modules
DMM
Fuse Rating
Fuse Type
Manufacturer
NI 4060
F 500 mA 250 V
Fast-Acting
Schurter
F 500 mA 250 V
Fast-Acting
Littelfuse
NI 4070/4072
F 1.25 A 250 V
Fast-Acting
Littelfuse
NI 4065, NI 4071
F 3.15 A 250 V
Fast-Acting
Littelfuse
NI CSM-10A
F 12.5 A 250 V
Fast-Acting
Schurter
NI CSM-200mA
F 500 mA 250 V
Fast-Acting
Schurter
