©
National Instruments Corporation
3
SCXI-1356 Shielded Cable Installation Guide
safety protection built into the product if the product is damaged in any
way. If the product is damaged, return it to National Instruments for repair.
Do
not
substitute parts or modify the product except as described in this
document. 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 the
section. Pollution is foreign
matter in a solid, liquid, or gaseous state that can reduce 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 that becomes conductive due to
condensation.
Clean the product with a soft nonmetallic brush. Make sure that the product
is 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 connecting them to or
disconnecting them from the product.
Operate this product only at or below the installation category stated in the
section.
The following is a description of installation categories:
•
Installation category I is for measurements performed on circuits not
directly connected to MAINS
1
. This category is a signal level such as
voltages on a printed wire board (PWB) on the secondary of an
isolation transformer.
Examples of installation category I are measurements on circuits not
derived from MAINS and specially protected (internal)
MAINS-derived circuits.
1
MAINS is defined as the electricity supply system to which the equipment concerned is designed to be connected either for
powering the equipment or for measurement purposes.
