4
|
ni.com
|
Getting Started with the NI PCIe-8233
Do
not
operate the device in an explosive atmosphere or where
flammable gases or fumes may be present. Operate the device only
at or below the pollution degree stated in the specifications.
Pollution consists of any foreign matter—solid, liquid, or
gas—that may reduce dielectric strength or surface resistivity. The
following is a description of pollution degrees.
•
Pollution Degree 1—No pollution or only dry, nonconductive
pollution occurs. The pollution has no effect.
•
Pollution Degree 2—Normally only nonconductive pollution
occurs. Occasionally, nonconductive pollution becomes
conductive because of condensation.
•
Pollution Degree 3—Conductive pollution or dry,
nonconductive pollution occurs. Nonconductive pollution
becomes conductive because of condensation.
Clean the device and accessories by brushing off light dust with a
soft, nonmetallic brush. Remove other contaminants with a stiff,
nonmetallic brush. The unit
must
be completely dry and free from
contaminants before returning it to service.