Technical Specifications of Digital Multimeter-EEWORLD

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The application requirements of various digital multimeters are different. For example, technicians need to use a benchtop digital multimeter to check the power supply of the logic circuit to confirm whether the output is around 5V. Other technicians need to test key circuits, check precision components, make precise adjustments to products, confirm whether the products meet relevant industrial standards, or make measurements in non-standard environments outside the laboratory. At this time, it is necessary to carefully evaluate the indicators of the digital multimeter used.

When evaluating whether a benchtop multimeter is suitable for an application and whether the readings of a digital multimeter are accurate, it is critical to have a deep understanding of the specifications of a digital multimeter. This article discusses the specifications of a digital multimeter and some ideas beyond the technical specifications. It explains the different components of the digital multimeter specifications and tells us how to apply them.

Technical specifications of digital multimeter

Regardless of the DMM we use to make measurements, we are taking a gamble. We are betting that the instrument we are using will give us the true value. Fortunately, the odds are in our favor, as a decent DMM will indeed provide measurement readings that are nearly identical to the true value.

Technical indicators are the specific embodiment of instrument performance. They should objectively list the performance of the instrument under specific usage conditions.

From this definition we can know the characteristics of a rigorously defined technical indicator.

Complete—The specification includes all uncertainty factors that affect the measurement results, including some operating limitations, such as temperature and humidity, altitude, vibration, etc.

Clear - Technical indicators should be as direct and understandable as possible.

Objectivity - Technical indicators should be objective and not mislead sales.

Good technical indicators should be as clear as a medical examination form or a bank statement. Manufacturers must be fully confident of the technical indicators of their customized products. As a user, you should also believe that the information you get from the technical indicators is accurate and complete.

In the technical data sheet, you can see the uncertainty specification and the correction values for the uncertainty. You can also see the operating limitations, such as environmental factors. This makes the uncertainty specification realistic and reliable. These correction values are expressed in words (such as humidity effects) or as reference to international standards (such as vibration and shock factors).

Summarize

This article introduces the technical specifications of digital multimeters. The next section will introduce where the uncertainties come from.

Reference address：Technical Specifications of Digital Multimeter

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