E-mail: service@1001718.com
E-mail: service@1001718.com
2016-05-10
In the quality inspection and R&D verification of electronic transformers and passive components, the integration of multi-parameter accuracy, testing efficiency, and system compatibility directly determines detection reliability. The Tonghui TH2818X Series, encompassing models like TH2818XA and TH2818XC, stands as a dedicated solution for low-voltage parameter measurement, combining a 20Hz-300kHz frequency range, 0.05% basic measurement accuracy, and programmable pin scanning capabilities. Unlike general-purpose LCR meters, the Tonghui TH2818X Series is engineered with transformer-specific testing requirements in mind, featuring hardware architectures and software algorithms tailored to industrial scenarioses. This article, drawing on official datasheets and technical specifications , analyzes the TH2818X Series from three core perspectives: comprehensive measurement capabilities, automated testing efficiency, and calibration-driven reliability, elucidating its technical value in practical applications.
The Tonghui TH2818X Series distinguishes itself through a parameter measurement system optimized for transformers and passive components, covering a broad spectrum of critical electrical indicators. All models in the TH2818X Series support measurement of |Z|, C, L, R, DCR, turn-ratio, phase, and leakage inductance, with LCRZ and DCR parameters achieving 0.05% basic accuracy, and turn-ratio measurement accuracy reaching 0.5% . For instance, when testing leakage inductance of network transformers, the TH2818X Series delivers a resolution of 0.00001μH, enabling the detection of subtle variations caused by winding craftsmanship.
Frequency and signal level flexibility enhances the TH2818X Series’ adaptability to diverse testing scenarioses. The series offers a frequency range of 20Hz to 300kHz with 10mHz resolution and 0.01% frequency accuracy , allowing precise matching to component operating frequencies—50Hz for low-voltage power transformers and over 100kHz for high-frequency communication transformers. Signal levels are adjustable from 5mV to 2V for standard LCR tests and extended to 5mV-4V for turn-ratio measurements, with 10mV-1V automatic level control (ALC) ensuring signal stability and preventing parameter drift in temperature-sensitive coils .
The turn-ratio measurement technology of the Tonghui TH2818X Series addresses challenges posed by low-coupling transformers. By calculating turn-ratio through inductance comparison between primary and secondary windings, the series reduces errors from magnetic flux leakage compared to traditional voltage-ratio methods . Supporting a wide display range of 1:0.01 to 100:1, the TH2818X Series accommodates transformers used in power supplies, telecommunications, and consumer electronics .
The programmable pin scanning system is a defining feature of the Tonghui TH2818X Series, significantly improving testing efficiency for multi-pin devices. Models like TH2818XA are equipped with 20 independent programmable pin channels, enabling custom pin combination testing and automatic winding switching via Scanner interfaces and dedicated fixtures . In testing 16-pin network transformers, the TH2818X Series completes all pin short-circuit checks and winding parameter measurements in 30 seconds—down from 2 minutes with manual operation .
Four-terminal measurement technology enhances the accuracy of pin-related tests in the TH2818X Series. By separating excitation and measurement circuits, this architecture eliminates errors from test lead resistance, delivering high precision for DC resistance (DCR) measurements across a 1mΩ-99.9999MΩ range . Laboratory data shows the TH2818X Series achieves a measurement error of only ±0.001mΩ for 10mΩ resistors, outperforming traditional two-wire methods . The series also supports both manual and pneumatic component fixing, adapting to low and high-volume production lines .
Storage and recall functions further boost the TH2818X Series’ efficiency in multi-model testing. The series can store up to 20 LCR setting files and 40 transformer scanning profiles , allowing quick parameter switching without reprogramming. A transformer manufacturer reported that the TH2818X Series reduced changeover time from 15 minutes to 2 minutes between product models, increasing overall testing efficiency by over 70% .
The Tonghui TH2818X Series maintains measurement integrity through a three-dimensional calibration system encompassing open, short, and load corrections . Open calibration eliminates stray capacitance and leakage resistance interference, reducing stray capacitance effects to below 0.01pF at 300kHz . Short calibration compensates for distributed inductance and series resistance in test leads, cutting lead inductance errors from 5μH to 0.05μH when using 1-meter cables .
Built-in DC bias sources and noise suppression technologies enhance the TH2818X Series’ stability in complex environments. All models feature internal 0V, 1.5V, and 2V DC bias sources with 1% accuracy, and support optional ±10V (±100mA) external bias current sources . Advanced digital sampling and low-noise amplification circuits boost signal-to-noise ratio above 80dB , ensuring stable measurements of weak parameters like small capacitances and leakage inductance in component-dense workshops.
System compatibility and data management capabilities align the TH2818X Series with modern industrial workflows. Standard RS232C interfaces and optional GPIB/USB ports enable seamless integration with automated production lines . The TH2818XC, for example, comes with standard test fixtures including TH26005B 4-terminal clamps, facilitating immediate deployment . Built-in comparators with 10-bin sorting and counting functions also support real-time quality classification .
The Tonghui TH2818X Series establishes a robust testing solution for electronic transformers and passive components through its comprehensive measurement capabilities, automated efficiency, and calibration reliability. By covering a wide range of critical parameters, supporting programmable pin scanning, and integrating multi-dimensional calibration, the TH2818X Series addresses the dual demands of precision and productivity in both laboratory and production environments. Models like TH2818XA and TH2818XC cater to varied application needs, from combined LCR and transformer testing to streamlined automatic inspection . As electronic components trend toward miniaturization and high-frequency operation, the Tonghui TH2818X Series’ flexible frequency range, accurate measurement, and system compatibility position it as a practical choice for industries including telecommunications, consumer electronics, and power supplies. Its design philosophy, centered on user-centric functionality and technical rigor, underscores its value in industrial testing workflows.
|
||||
|
||||
 |
3183402039