Overrange/Underrange

NI Digital Multimeters

previous page next page

Overrange/Underrange

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

NI 4070/4071/4072

Function	Overrange¹	Underrange²
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

Function	Overrange¹
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).

Function

Overrange¹

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%
DC and AC Current	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%
DC and AC Current	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).

previous page start next page