This section describes the overrange and/or underrange conditions, as applicable, for the PXIe‑4080/4081/4082.

Function Overrange1 Underrange
DC Functions:Voltage, Current, Resistance, and Diode
  • Above 105%, NI-DMM returns NaN2 (except for the 100 MΩ range on the NI 4080/4082) and the IVI overrange warning.
  • For the 100 MΩ range on the NI 4080/4082, measurements between 105 MΩ and 1.05 GΩ return the IVI overrange warning. For measurements above 1.05 GΩ, NI-DMM returns NaN2 and the IVI overrange warning instead of the reading.
Not applicable
AC Functions:Voltage and Current
  • Above 105%, NI-DMM returns readings (not NaN2) and the IVI overrange warning, even though the readings are not guaranteed within specifications.
  • At significantly higher than 105%, NI-DMM returns a NaN2 and the IVI overrange warning.
Not applicable
Frequency/Period Not applicable
  • Below 5%, NI-DMM returns –Inf and the NI-DMM underrange warning.
Capacitance (NI 4082 only)
  • Above 110%, NI-DMM returns readings (not NaN2) and the IVI overrange warning, even though the readings are not guaranteed within specifications.
  • Occurs below 5% of the range, except in the 300 pF range. The 300 pF range does not have underrange.
  • Below 5%, NI-DMM returns –Inf and the NI-DMM underrange warning.
Inductance (NI 4082 only)
  • Above 110%, NI-DMM returns NaN2 and the IVI overrange warning.
  • Can occur below ≤1% of range for the 10 mH, 100 mH, 1 H, and 5 H ranges when the signal is too weak for the measurement to occur.
  • In such cases, NI-DMM returns 0 H and the NI-DMM underrange warning.

1Refer to the NI IVI Driver Help at ni.com/docs for the IVI overrange warning code.

2 NaN is a digital display value for a floating-point representation of "Not a Number," as defined by the IEEE standard for binary floating point arithmetic. NaN is typically the result of an undefined operation, such as log(-1).