National Instruments Compact FieldPoint cFP-1808 Quick Start Manual page 18

Do not operate Compact FieldPoint products in an explosive atmosphere or where
there may be flammable gases or fumes. If you need to operate Compact
FieldPoint products in such an environment, the Compact FieldPoint products
must be in a suitably rated enclosure.
If you need to clean a Compact FieldPoint product, use a soft nonmetallic brush.
The product must be completely dry and free from contaminants before you return
it to service.
Operate the product only at or below Pollution Degree 2. 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 which becomes conductive due to
condensation.
Caution
for which the Compact FieldPoint product is rated. Do not exceed the
maximum ratings for the product. Do not install wiring while the
product is live with electrical signals. Do not remove or add connector
blocks when power is connected to the Compact FieldPoint system.
Avoid contact between your body and the connector block signal wiring
when hot-swapping modules.
© National Instruments Corporation
You must insulate signal connections for the maximum voltage
17 cFP-1808 Quick Start Guide