Chapter 1
Introduction
©
National Instruments Corporation
1-5
Safety Information
The following section contains important safety information that you
must
follow during installation and use of the product.
Do
not
operate the product in a manner not specified in this document.
Misuse of the product can result in a hazard. You can compromise the
safety protection built into the product if the product is damaged in any
way. If the product is damaged, return it to NI for repair.
If the product is rated for use with hazardous voltages (>30 V
rms
, 42.4 V
pk
,
or 60 V
DC
), you may need to connect a safety earth-ground wire according
to the installation instructions. Refer to Appendix A,
, for
maximum voltage ratings.
Do
not
substitute parts or modify the product. Use the product only with the
chassis, modules, accessories, and cables specified in the installation
instructions. You
must
have all covers and filler panels installed during
operation of the product.
Do
not
operate the product in an explosive atmosphere or where there may
be flammable gases or fumes. Operate the product only at or below the
pollution degree stated in Appendix A,
. Pollution is foreign
matter in a solid, liquid, or gaseous state that can produce a reduction of
dielectric strength or surface resistivity. The following is a description of
pollution degrees:
•
Pollution Degree 1 means no pollution or only dry, nonconductive
pollution occurs. The pollution has no influence.
•
Pollution Degree 2 means that only nonconductive pollution occurs in
most cases. Occasionally, however, a temporary conductivity caused
by condensation must be expected.
•
Pollution Degree 3 means that conductive pollution occurs, or dry,
nonconductive pollution occurs, which becomes conductive due to
condensation.
Clean the product with a soft nonmetallic brush. The product
must
be
completely dry and free from contaminants before returning it to service.
You
must
insulate signal connections for the maximum voltage for which
the product is rated. Do
not
exceed the maximum ratings for the product.
Remove power from signal lines before connection to or disconnection
from the product.
