Figure 8. Voltage Drop Across a Diode
+
–
HI
LO
HI
LO
Requirements for Cables and Probes
The DMM shipping kit contains a pair of test probes with safety banana plugs. These probes
meet international safety requirements, including UL 3111 and IEC-1010-1, for the full range
of applications supported by the DMM.
Caution
Before using any probes or accessories, ensure that they meet applicable
safety requirements for the signal levels you may encounter.
Connect the test probes to the banana plug connectors on the DMM front panel using safety
banana plugs. The shrouds around the banana plugs prevent you from contacting potentially
hazardous voltages connected to the test probes. You can also connect the cable to standard,
unshrouded banana plug probes or accessories. Use unshrouded probes or accessories only
when the voltages are less than 30 Vrms and 42 Vpk, or 60 VDC.
Caution
(NI 4081 users) To prevent possible safety hazards, the maximum voltage
between any of the inputs and the ground of the PXI Express chassis is 500 VDC or
500 Vrms (sine wave), except between the HI terminal and ground, where the
maximum voltage is 1,000 VDC or700 Vrms (sine wave). The maximum current the
NI 4081 can measure through the current inputs is ±3 ADC or 3 Arms.
Caution
(NI 4080/4082 users) To prevent possible safety hazards, the maximum
voltage between any of the inputs and the ground of the computer is 300 VDC or
300 Vrms. The maximum current the NI 4080/4082 can measure through the current
inputs is ±1 ADC or 1 Arms.
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NI PXIe-4080/4081/4082 Getting Started Guide
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