National Instruments NI 9426

Isolation

Channel-to-channel.................... None

Channel-to-earth ground

Continuous........................... 60 VDC,

Measurement Category I

Withstand............................. 1,000 Vrms, 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 9426 to signals or use for

measurements within Measurement CategoriesII,

III, orIV.