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NI 9235/9236 30 ni.com
Isolation
Channel-to-channel ....................None
Channel-to-earth ground
Continuous...........................60 VDC,
Measurement Category I
Withstand .............................1,000 V
rms
, verified by a 5 s
dielectric withstand test
Measurement Category I is for measurements performed on
circuits not directly connected to the electrical distribution system
referred to as MAINS voltage. MAINS is a hazardous live electrical
supply system that powers equipment. This category is for
measurements of voltages from specially protected secondary
circuits. Such voltage measurements include signal levels, special
equipment, limited-energy parts of equipment, circuits powered by
regulated low-voltage sources, and electronics.
Caution Do not connect the NI 9235/9236 to signals or
use for measurements within Measurement Categories II,
III, or IV.