Understand the principles and working methods of the DC digital display voltmeter and ammeter system.

A DC digital display meter system is an instrument used to measure DC electrical signals, converting current or voltage values into digital form for display. Here is the principle and working method of a DC digital display meter system:

Principle: The principle of a DC digital display meter system can be broadly divided into two parts: signal acquisition and digital display. In terms of signal acquisition, the system collects the DC voltage or current signal to be measured through sensors, circuits, and other components, converting it into a corresponding analog voltage signal. This analog voltage signal is then converted into digital form by an analog-to-digital converter (A/D converter), ultimately displayed on a digital display.

Working Method: The working method of a DC digital display meter system mainly involves the following steps:

1. Signal Acquisition: The system captures DC voltage or current signals from the circuit under test through sensors or terminal blocks.

2. Signal Conditioning: After signal acquisition, signal conditioning may be required, such as filtering, amplifying, or attenuating the signal, to ensure signal quality and accuracy.

3. Analog-to-Digital Conversion: The conditioned analog voltage signal is then processed by an analog-to-digital converter (A/D converter) to convert it into digital binary data.

4. Digital Display: Finally, the digitized voltage or current value is displayed in digital form on a digital display. Digital displays commonly use LED or LCD technology to visually present voltage or current values.

5. Function Expansion: Some advanced DC digital display meter systems may also have extended functions such as data storage, data transmission, and alarm functions to meet more testing requirements.

Through these working methods, the DC digital display meter system can display the DC voltage or current value of the circuit under test in real-time and accurately, providing important test data support for engineers and technicians. Additionally, DC digital display meter systems are characterized by simple operation, high precision, and good stability, making them widely used in laboratories, industrial production, and other fields.