©
National Instruments Corp.
21
NI 9215E Operating Instructions and Specifications
Measurement Category II is for measurements performed on
circuits directly connected to the electrical distribution system.
This category refers to local-level electrical distribution, such as
that provided by a standard wall outlet, for example, 115 V for U.S.
or 230 V for Europe.
Caution
Do
not
connect the NI 9215E with screw
terminal to signals or use for measurements within
Measurement Categories III or IV.
NI 9215E with BNC Safety Voltages
Connect only voltages that are within the following limits.
AI+-to-AI–........................................ ±30 V max
Isolation
Channel-to-channel .................... None
Channel-to-earth ground
Continuous ........................... 60 VDC,
Measurement Category I,
(Double Insulation)
Withstand ............................. 1,500 V
rms
, verified by a
5 s dielectric withstand test
