The National Instruments USB-4065, part number 196824D-01L, is a 6.5 digit digital multimeter with USB connectivity. It provides precision measurement of voltage, current, resistance, and diode characteristics. The USB-4065 is used in laboratory measurement, calibration, production test, and automated data acquisition where accurate electrical measurement is required.
Digital multimeters are fundamental test instruments. The USB-4065 brings precision measurement to a USB form factor. Engineers can integrate it with a computer and other test equipment. This supports compact automated test systems and bench measurement setups.
Precision Measurement Functions
The USB-4065 provides DC voltage, AC voltage, DC current, AC current, resistance, and diode measurement. The 6.5 digit resolution supports fine measurement of small changes. Engineers should select range and integration time for the required accuracy and speed.
Proper wiring and shielding help maintain measurement quality. Test leads and fixtures should be suitable for the signal level. For low current and high resistance measurements, leakage and noise should be controlled.
USB Connectivity
The multimeter connects to a host computer over USB. USB connectivity simplifies setup and allows use with laptops and desktop computers. Engineers should verify driver compatibility and software support.
For bench use, the USB-4065 can be connected to a fixed workstation. For portable use, it can be used with a laptop.
Software and Automation
The USB-4065 is controlled through NI software and standard programming environments. Engineers can configure measurement functions, ranges, and triggers. Software can sequence tests, apply limits, and store results.
For calibration and production test, automation reduces operator error and improves repeatability. Documentation of test configurations and calibration schedules supports reliable operation.
Applications
The USB-4065 is suited to calibration laboratories, component validation, power supply testing, and production verification. It supports precision electrical measurement in a compact USB system.
Installation and Maintenance
Installation requires connecting the multimeter to the host computer and proper test leads. Test connections should be shielded where appropriate. The instrument should be placed in a location with adequate ventilation.
Maintenance includes calibration, connector inspection, and verification of measurement settings. Documentation helps troubleshooting and repeatability.
Summary
The National Instruments USB-4065 Digital Multimeter provides 6.5 digit precision measurement for voltage, current, resistance, and diodes with USB connectivity. It supports laboratory, calibration, and automated test applications. The USB-4065 is a practical DMM for engineers who need modular precision measurement.
