Safety Guidelines For Hazardous Locations - National Instruments NI 9375 Getting Started Manual

circuits. Such voltage measurements include signal levels, special
equipment, limited-energy parts of equipment, circuits powered
by regulated low-voltage sources, and electronics.

Safety Guidelines for Hazardous Locations

The NI 9375 is suitable for use in Class I, Division 2, Groups A,
B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4
and Ex nA IIC T4 hazardous locations; and nonhazardous
locations only. Follow these guidelines if you are installing the
NI 9375 in a potentially explosive environment. Not following
these guidelines may result in serious injury or death.
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Do not connect the NI 9375 to signals or use
Caution
for measurements within Measurement Categories II,
III, or IV.
Measurement Categories CAT I and CAT O are
Note
equivalent. These test and measurement circuits are not
intended for direct connection to the MAINS building
installations of Measurement Categories CAT II,
CAT III, or CAT IV.