Overrange/Underrange

NI Digital Multimeters

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Overrange/Underrange

This section describes the overrange and/or underrange conditions, as applicable, for each National Instruments DMM.

NI 4070/4071/4072

FunctionOverrange1Underrange2
DC Functions:

Voltage, Current, Resistance, and Diode 		All ranges, except 300 V and 1 A (NI 4070/4072) or 1000 V and 3 A (NI 4071):
  • Occurs above 105% of the range.
  • Above 105%, NI-DMM returns NaN3 (except for the 100 MΩ range on the NI 4070/4072) and the IVI overrange warning.
  • For the 100 MΩ range on the NI 4070/4072, measurements between the 105 MΩ and 1.05 GΩ ranges have a typical accuracy of 5%, although NI-DMM returns the IVI overrange warning. For measurements above 1.05 GΩ, NI-DMM returns NaN3 and the IVI overrange warning instead of the reading.


300 V and 1 A ranges (NI 4070/4072) or 1000 V and 3 A ranges (NI 4071):
  • Occurs above 105% of the range.
  • Above 105%, NI-DMM returns readings (not NaN3) and the IVI overrange warning, even though the readings are not guaranteed within specifications.
 Not applicable
AC Functions:

Voltage and Current 		All ranges, except 300 V and 1 A (NI 4070/4072) or 700 V and 3 A (NI 4071):
  • Occurs above 105% of the range.
  • Above 105%, NI-DMM returns readings (not NaN3) and the IVI overrange warning, even though the readings are not guaranteed within specifications.
  • At significantly higher than 105%, NI-DMM returns a NaN3 and the IVI overrange warning.


300 V and 1 A ranges (NI 4070/4072) or 700 V and 3 A ranges (NI 4071):
  • Occurs above 105% of the range.
  • Above 105%, NI-DMM returns readings (not NaN3) and the IVI overrange warning, even though the readings are not guaranteed within specifications.
 Not applicable
Frequency/Period Not applicable
  • Occurs when the signal amplitude is below 5% of the voltage range4.
  • Below 5%, NI-DMM returns –Inf and the NI-DMM underrange warning.
Capacitance (NI 4072 only)
  • Occurs above 110% of the range.
  • Above 110%, NI-DMM returns readings (non NaN3) 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 4072 only)
  • Occurs above 110% of the range.
  • Above 110%, NI-DMM returns NaN3 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 National Instruments IVI Help at ni.com/manuals for the IVI overrange warning code.
2Refer to the Error and Warning Codes section for the NI-DMM underrange warning code.
3 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).
4Frequency voltage range is a property with the same allowed values as for the AC voltage ranges. Refer to Frequency/Period and Frequency Voltage Range for more information.

NI 4065

FunctionOverrange1
DC Functions:

Voltage, Current, Resistance, and Diode 		All ranges, except 300 V and 3 A:
  • Occurs above 105% of the range.
  • Above 105%, NI-DMM returns NaN3 (except for the 100 MΩ range on the NI 4065) and the IVI overrange warning.
  • For the 100 MΩ range on the NI 4065, measurements between the 105 MΩ and 1.05 GΩ ranges have a typical accuracy of 5%, although NI-DMM returns the IVI overrange warning. For measurements above 1.05 GΩ, NI-DMM returns NaN3 and the IVI overrange warning instead of the reading.


300 V and 3 A ranges:
  • Occurs above 100% of the range.
  • Above 100%, NI-DMM returns readings (not NaN3) and the IVI overrange warning, even though the readings are not guaranteed within specifications.
AC Functions:

Voltage and Current 		All ranges, except 300 V and 3 A:
  • Occurs above 105% of the range.
  • Above 105%, NI-DMM returns NaN3 and the IVI overrange warning.


300 V and 3 A ranges:
  • Occurs above 100% of the range.
  • Above 100%, NI-DMM returns readings (not NaN3) and the IVI overrange warning, even though the readings are not guaranteed within specifications.
1Refer to the National Instruments IVI Help at ni.com/manuals for the IVI overrange warning code.
3 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).

NI 4060

Function Range Overrange (V)1 Overrange (%)1
DC and AC Voltage 250 V 300 V 120%
25 V 27 V 108%
2 V 2.2 V 110%
200 mV 220 mV 110%
20 mV 22 mV 110%
DC and AC Current 20 mA 22 mA 110%
200 mA 220 mA 110%
Resistance (2- and 4-Wire) Extended >2 MΩ None 100%
2 MΩ None 100%
200 kΩ None 100%
20 kΩ None 100%
2 kΩ None 100%
200 Ω None 100%
Diode 2 V 2.2 V 110%
1NI-DMM returns NaN and the IVI overrange warning when measurement values exceed the overrange limits on the NI 4060. Refer to the National Instruments IVI Help at ni.com/manuals for the IVI overrange warning code.

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).

NI 4050

Function Range Overrange (V)1 Overrange (%)1
DC and AC Voltage 250 V None 100%
25 V 27 V 108%
2 V 2.2 V 110%
200 mV 220 mV 110%
20 mV 22 mV 110%
DC and AC Current 20 mA 22 mA 110%
200 mA 220 mA 110%
Resistance (2- and 4-Wire) Extended >2 MΩ None 100%
2 MΩ None 100%
200 kΩ None 100%
20 kΩ None 100%
2 kΩ None 100%
200 Ω None 100%
Diode 2 V 2.2 V 110%
1NI-DMM returns NaN and the IVI overrange warning when measurement values exceed the overrange limits on the NI 4050. Refer to the National Instruments IVI Help at ni.com/manuals for the IVI overrange warning code.

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).
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