Insider Look: Teardown of Keithley 2015 THD Multimeter

Table of Contents:

1. Introduction
2. Overview of the Keithley 20115 THD Multimeter
3. Key Features and Specifications
4. Advantages and Disadvantages of the Keithley 20115 THD Multimeter
5. How the Total Harmonic Distortion Measurement Works
6. Using the Keithley 20115 THD Multimeter
   • Connecting to a PC
   • Selecting Measurement Settings
   • Performing THD Measurements
7. Understanding Total Harmonic Distortion
   • What is Total Harmonic Distortion?
   • Why is THD Measurement Important?
   • Applications of THD Measurement
8. Comparison with Other Multimeters in the Market
9. Tips for Maintenance and Care of the Keithley 20115 THD Multimeter
10. Conclusion

Article:

Keithley 20115 THD Multimeter: A Comprehensive Review

The Keithley 20115 THD Multimeter is a classic, yet still Current, model that offers precise and accurate measurement capabilities. With 6 and a half digits and a classic green vacuum fluorescent display, this multimeter is known for its reliability and precision. In this article, we will explore the key features and specifications of the Keithley 20115 THD Multimeter, discuss the advantages and disadvantages of using this device, and Delve into the concept of Total Harmonic Distortion (THD) in Detail.

Introduction

Multimeters are essential tools for any electrical engineer or technician, enabling them to measure various parameters such as voltage, current, and resistance. The Keithley 20115 THD Multimeter stands out from the crowd due to its unique capability of performing THD automated system measurements. In this article, we will take a close look at this versatile instrument, understanding its functionality and examining its potential applications.

Overview of the Keithley 20115 THD Multimeter

The Keithley 20115 THD Multimeter was designed and first sold around 1998, making it a 15-year-old model. However, it continues to be a popular choice due to its precise measurements and reliable performance. This multimeter is not just an ordinary device; it is equipped with a low-noise function generator that allows for automated system measurements, especially in the area of Total Harmonic Distortion (THD) analysis. The THD feature sets it apart from other multimeters on the market, making it a preferred choice for those working in audio frequency range systems.

Key Features and Specifications

The Keithley 20115 THD Multimeter boasts several key features that make it an excellent choice for professionals in the field:

• 6 and a half digits display for precise measurement accuracy.
• Classic green vacuum fluorescent display for easy readability.
• Low noise function generator for automated THD measurements.
• BNC output connectors for the low distortion function generator.
• Support for four-wire ohms measurement for accurate resistance measurements.
• Multiple range options for current measurements.
• Fast updating and high update rate for quick measurements.
• Filter options for optimized data acquisition.
• Connectivity options via GPIB, RS-232, and step and scan capability.

These features combine to offer professionals a versatile and reliable device with precise measurement capabilities. Whether it is for testing audio systems or conducting complex electronic experiments, the Keithley 20115 THD Multimeter is equipped to handle a wide range of measurement tasks.

Advantages and Disadvantages of the Keithley 20115 THD Multimeter

Like any device, the Keithley 20115 THD Multimeter has its pros and cons. Understanding these can help professionals make an informed decision when selecting a multimeter for their specific needs.

Advantages:

• Precise and accurate measurements with 6 and a half digits display.
• Low noise function generator for automated THD measurements.
• Versatile connectivity options for easy integration into systems.
• Compact and Durable design for long-lasting performance.
• Excellent value for money, especially when compared to newer models.

Disadvantages:

• Limited functionality compared to more modern multimeters.
• Less range options for certain measurements, such as current.
• Lack of microamps range for current measurements.
• Outdated design and user interface.

Despite these drawbacks, the Keithley 20115 THD Multimeter remains a reliable and capable instrument for professionals in need of precise measurements, especially in the field of THD analysis.

How the Total Harmonic Distortion Measurement Works

Total Harmonic Distortion (THD) is a key parameter in audio frequency systems as it measures the amount of distortion present in a signal. The Keithley 20115 THD Multimeter offers automated THD system measurements, making it a valuable tool for audio professionals and engineers. The multimeter uses its low noise function generator to generate an input signal and then measures the distortion in the output signal using its high precision ADC.

Using the Keithley 20115 THD Multimeter

To make full use of the Keithley 20115 THD Multimeter's capabilities, it is essential to understand its operation and settings. Connecting the multimeter to a PC allows for better control and analysis of the measurements. Once connected, users can select the desired measurement settings, such as the number of digits, update rate, and filter options. Performing THD measurements involves connecting the device to the system under test, selecting the appropriate input range, and initiating the measurement.

Understanding Total Harmonic Distortion

Total Harmonic Distortion is a crucial parameter in audio systems as it affects the quality of the signal. By accurately measuring THD, professionals can ensure that audio systems perform optimally and produce high-quality sound. This section will delve into the concept of THD, its importance, and its applications in various fields.

Comparison with Other Multimeters in the Market

While the Keithley 20115 THD Multimeter is a reliable and accurate instrument, it is essential to compare it with other multimeters available in the market. By understanding the different features and functionalities, professionals can make an informed choice when selecting a multimeter that best suits their specific requirements.

Tips for Maintenance and Care of the Keithley 20115 THD Multimeter

To ensure the longevity and optimal performance of the Keithley 20115 THD Multimeter, it is crucial to follow proper maintenance and care practices. This section will provide valuable tips and guidelines to keep the instrument in excellent working condition.

Conclusion

The Keithley 20115 THD Multimeter is a versatile and reliable instrument that offers precise measurements, especially in the area of Total Harmonic Distortion analysis. Despite being an older model, it continues to be a popular choice due to its accuracy and affordability. By understanding its key features, operation, and applications, professionals can harness the potential of this instrument for a wide range of measurement tasks.

Highlights:

• The Keithley 20115 THD Multimeter offers precise measurements with its 6 and a half digits display.
• It features a low noise function generator for automated THD measurements.
• The multimeter's compact design and versatility make it an excellent choice for professionals in various fields.
• Total Harmonic Distortion (THD) measurement is a key capability of this device, with applications in audio systems.
• While it has some limitations compared to newer models, the Keithley 20115 THD Multimeter provides excellent value for money.