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NI Digital Multimeters Getting Started Guide
- Last Updated2023-08-28
- Manual: NI Digital Multimeters Getting Started Guide
DC and AC Coupling
The DMM offers two different modes for measuring AC voltage: AC Volts AC Volts DC Coupled Note The NI 4065 only offers the AC Volts mode for measuring AC voltage. AC Volts Mode AC Volts mode uses a coupling capacitor
- 1 minute read
- Last Updated2023-05-10
- Manual: NI Digital Multimeters
DC Noise Rejection
DC noise rejection is a configurable noise reduction feature available for DMM DC measurements. Each DC reading the DMM returns is actually an average of multiple high-speed samples. By adjusting the relative weighting of those samples, you can adjust the
- 3 minute(s) read
- Last Updated2023-05-10
- Manual: NI Digital Multimeters
DC Voltage
The DMM can measure signals in the sub-microvolt range. To take accurate low-voltage measurements with confidence, consider the following factors: thermal voltages, selectable input resistance, and input bias current. Selectable Input Resistance You can select the DCV input resistance to
- 2 minute(s) read
- Last Updated2023-05-10
- Manual: NI Digital Multimeters
2-Wire Resistance Measurements
You can use the 2-wire method to get accurate measurements above 100 kΩ. For lower resistance values, such as 100 Ω, the interconnecting cabling can add significant resistance that can greatly affect your measurement. Copper has a temperature coefficient in
- 3 minute(s) read
- Last Updated2023-05-10
- Manual: NI Digital Multimeters
Fuse Replacement
This section explains how to replace the fuse in the NI 4065. Caution For protection against fire, replace the fuse only with fuses of the same type and rating. Refer to the following table for fuse types. DMM Fuse Rating
- 2 minute(s) read
- Last Updated2023-08-16
- Manual: NI Digital Multimeters
Diode
The DMM can excite a DUT with a constant current source and read the resulting voltage drop using a 10 V DC range. Diode mode is useful for testing p-n junctions, LEDs, and zener diodes. The default current excitation is
- 1 minute read
- Last Updated2023-05-10
- Manual: NI Digital Multimeters
Input Protection
The current-measuring circuit is protected with a fuse rated at F 3.15 A 250 V. The NI 4065 and NI 4071 can measure up to 3 A DC or 3 A rms with up to 4.2 A peak current (sine
- 1 minute read
- Last Updated2023-05-10
- Manual: NI Digital Multimeters
System Considerations for Resistance Measurements
When measuring resistance in a system, it is important to consider the effects of cable resistance. It is also important to notice that interactions between scanning multiple resistances and system cabling can present time-dependent problems. These problems can be avoided
- 2 minute(s) read
- Last Updated2023-05-10
- Manual: NI Digital Multimeters
Temperature Measurements
The DMM can measure temperature using common temperature transducers. The three most commonly used transducers for temperature are thermocouples, thermistors, and resistance temperature detectors (RTDs). The following table illustrates some of the capabilities and limitations of these sensors. Use this
- 2 minute(s) read
- Last Updated2023-05-10
- Manual: NI Digital Multimeters