Electronic components are the basic components of electronic products, and their quality and stability directly affect the performance and reliability of electronic products.

When the electronic components work, there is no internal power supply of any form, this device is called passive devices, that is, passive components, relative to the active and passive devices in electronics with internal power supply is active devices (active components).

Capacitors, inductors and resistors are the most widely used passive components in electronic circuits, which respectively correspond to the capacitive reactance, inductive reactance and impedance in the circuit, and their roles are different. As common small passive components, they have a direct impact on circuit parameters and relate to the advantages and disadvantages of electronic products. Therefore, we need to understand the characteristic parameters of each component and measure them accurately at all times.

01

Impedance testing, quality assurance for active and passive devices in electronics

Capacitance/resistance/inductance tests can be collectively referred to as impedance tests. Impedance refers to the resistance of a device or circuit to the AC current flowing through it at a given frequency, and is an important parameter for evaluating circuits, components, and materials for making components.

If you want the board to run fast, you also need to control the impedance, if the impedance does not meet the specifications, active and passive devices in electronics will not work properly.

There are many ways to measure impedance, each with its own advantages and disadvantages. Before measurement, it is necessary to first consider the requirements and conditions of measurement, such as frequency coverage, measurement range, measurement accuracy and ease of operation, and then choose the appropriate measurement method.

LCR tester is an instrument that uses AC mode to measure the parameters of passive components such as inductance (L), capacitance (C) and resistance (R). It has the characteristics of direct function and simple operation, and can meet the testing requirements of the production line quality assurance, incoming inspection and electronic maintenance industry with a low budget.

02

The market prospect of LCR tester is bright under the policy

active and passive devices in electronics testing field is the main demand side of LCR tester, the demand accounted for 90.0%.

With the rapid development of downstream industries such as information and communications, new energy vehicles, aerospace, radio frequency front-end, and commercial 5G, the test market for active and passive devices in electronics is constantly expanding in our country. The test market for active and passive devices in electronics in 2021 will reach 37.88 billion yuan, up 8.4% year on year. This trend has also ushered in a broader development space for China's LCR tester market.

According to the "2023-2028 LCR tester industry market in-depth research and investment prospects forecast Analysis Report" released by the New Thought Industry Research Center, China's LCR tester industry is driven by national policy support and market demand, and the development speed is accelerating. In 2021, China's LCR tester market size reached 55.13 billion yuan, an increase of 5.2%.

With the continuous breakthrough and innovation of research and development and production technology, it is expected that in 2022-2027, China's LCR tester market will maintain a compound annual growth rate of more than 5.0%, and by 2027, its market size will exceed 74 billion yuan. It will provide more accurate and efficient testing solutions for China's active and passive devices in electronics testing. To further promote the rapid development of active and passive devices in electronics testing industry in our country.

03

The development of modern technology has promoted the upgrading of the LCR tester

In the past, LCR testers used the bridge method to verify component performance. However, with the development of modern analog and digital technology, especially the development of high-speed operational amplifier and microprocessor technology, modern impedance measurement technology is developing towards higher accuracy, more functions, higher speed and integration and intelligence, and automatic balance bridge method has gradually become the mainstream.

The instrument using the automatic balance bridge method is also known as the digital LCR measuring instrument, which can not only measure the impedance, but also directly display the L-Q,C-D,R-D and Z-Q (quality factor Q, loss factor D) inductance capacitance value parameters.

Principle of automatic balancing bridge method

When using LCR tester to measure component parameters, the key problem is the measurement error. Its error mainly comes from two aspects, on the one hand, the internal error of the LCR tester itself, and on the other hand, the error caused by incorrect calibration, test part connection method and incorrect selection of measurement circuit model.

In order to meet the needs of users in the field of material, semiconductor and component testing and other aspects of impedance testing, Huashengchang has developed and launched a handheld DT-9935 LCR professional digital multimeter, which can accurately and stably measure various component parameters with reasonable accuracy.

04

The DT-9935 LCR tester can measure inductance, capacitance and resistance based on measurement and reference to secondary parameters (loss factor D, quality factor Q, phase Angle Θ, equivalent series and parallel resistance).

In addition, it also has an innovative automatic selection technology, just open the instrument can automatically test inductance, capacitance and resistance, consumption and Θ, the test speed of up to 5 times/second, with low power consumption, high measurement accuracy, fast speed and so on.

According to the actual conditions of the components to be tested and the difference in combination, the DT-9935LCR tester has two detection modes: series mode and parallel mode.

Ac impedance and DC resistance measurements can also be automatically selected, which means that the user can directly measure inductance, capacitance and resistance in AUTOLCR mode. The device is automatically identified and selected without the need for manual adjustment using the function.

DT-9935 LCR tester supports the measurement of AC signal level of 0.6mVRMS typ, the measurement range (when F=1KHz), the measurement range of inductance is 2000.0μH ~ 2000.0H, and the measurement range of capacitance is 2000.0pF ~ 2000.0uF. The measuring range of resistance is 20.000Ω ~ 200.00MΩ. 20000 high-definition double-layer LCD LCD display, multi-dimensional digital display, reading at a glance

The user can also be used in manual choice test frequency, depending on the type of device being tested five optional test frequency (100 hz / 120 hz / 1 KHZ / 10 KHZ / 100 KHZ), more can satisfy the actual needs. It is suitable for the measurement and screening of inductance, capacitance and resistance in laboratory, production line, maintenance point and teaching.

Impedance testing of electronic components is very important for the quality and stability of electronic products.

active and passive devices in electronics https://www.unikeyic.com/blog/list-of-passive-electronic-components-functions-and-applications.html