Hp 3478a: comprehensive specifications & features

The HP 3478A is a versatile and reliable digital multimeter manufactured by Hewlett Packard. It is widely used in various industries and applications due to its high accuracy and advanced features. In this article, we will delve into the specifications of the HP 3478A and explore its capabilities.

Content Index

Key Specifications

The HP 3478A offers a wide range of measurement capabilities, making it suitable for both basic and complex electrical measurements. Here are some key specifications:

  • DC Voltage Measurement: The HP 3478A can measure DC voltages from 100 microvolts to 1000 volts with a basic accuracy of 0.0035%.
  • AC Voltage Measurement: It can measure AC voltages from 100 microvolts to 750 volts with a basic accuracy of 0.15%.
  • DC Current Measurement: The HP 3478A offers DC current measurement capabilities ranging from 100 nanoamps to 3 amps with a basic accuracy of 0.03%.
  • AC Current Measurement: It can measure AC currents from 100 microamps to 3 amps with a basic accuracy of 0.4%.
  • Resistance Measurement: The HP 3478A has a resistance measurement range from 100 milliohms to 120 megaohms with a basic accuracy of 0.03%.
  • Frequency Measurement: It can measure frequencies from 10 Hz to 1 MHz with a basic accuracy of 0.01%.

Additional Features

Aside from its impressive measurement capabilities, the HP 3478A also offers several additional features that enhance its functionality:

  • Auto Ranging: The multimeter automatically selects the appropriate range for the measured parameter, simplifying the measurement process.
  • Data Logging: The HP 3478A can log measurement data into its internal memory, allowing users to retrieve and analyze the data later.
  • Math Functions: It offers various mathematical functions such as min/max/average, relative mode, and dBm measurement, enabling users to perform advanced calculations.
  • Interface Options: The HP 3478A provides interfaces for both GPIB (General Purpose Interface Bus) and RS-232, allowing seamless integration with computer systems.


The HP 3478A is widely used in various industries and applications, including:

  • Research and Development: The high accuracy and advanced features of the HP 3478A make it suitable for research and development purposes, where precise measurements are crucial.
  • Electronic Manufacturing: The multimeter's wide measurement range and data logging capabilities make it an ideal tool for electronic manufacturing, ensuring quality control and accurate testing.
  • Field Service: Its portability and versatility make the HP 3478A suitable for field service technicians who require a reliable multimeter for on-site measurements.
  • Education: The HP 3478A is commonly used in educational institutions to teach students about electrical measurements and instrumentation.

Frequently Asked Questions

Q: Can the HP 3478A measure capacitance?

A: No, the HP 3478A does not have the capability to measure capacitance. It is primarily designed for voltage, current, resistance, and frequency measurements.

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Q: What type of display does the HP 3478A have?

A: The HP 3478A features a 5-digit LED display, providing clear and easy-to-read measurement readings.

Q: Does the HP 3478A come with a calibration certificate?

A: Yes, the HP 3478A is typically sold with a calibration certificate, ensuring its accuracy and adherence to industry standards.

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The HP 3478A is a powerful digital multimeter with a wide range of measurement capabilities and advanced features. Its high accuracy and reliability make it a popular choice in various industries and applications. Whether you are involved in research and development, electronic manufacturing, field service, or education, the HP 3478A is a versatile tool that can meet your measurement needs with precision and efficiency.

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