The KD2878-1 testing system is engineered for research institutes, universities, quality inspection departments, and industrial manufacturers to evaluate the electrical insulating properties of various materials. It specializes in measuring capacitance ($C_p$), dielectric loss tangent ($\tan\delta$ / $D$), and relative permittivity ($\varepsilon_r$) under low-frequency electrical fields.
Solid Material Testing: Evaluating the dielectric properties and loss factors of sheets, films, and ultra-thin adhesive insulating materials (via stacking methods).
Liquid Medium Analysis: Determining the dielectric constant of chemical liquids, oils, and liquid insulation mediums using specialized interchangeable liquid test cups.
Advanced Material Research: Characterizing newly developed polymers, ceramics, and electronic components during frequency sweeps or voltage profiling.
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The KD2878-1 Low-Frequency Dielectric Constant and Dielectric Loss Tester is a high-precision, industrial-grade analytical instrument integrated with state-of-the-art measurement technologies.
The system consists of a high-performance impedance analyzer host and the S916 specialized micrometer test fixture. The host features a high-resolution $800 \times 480$ TFT color LCD touch screen that graphically monitors real-time measurements and parameter settings. Operating on an intuitive embedded control workflow, it allows users to perform full-frequency open-circuit zero calibrations, execute multi-parameter lists, and perform curve scans effortlessly.
Paired with the S916 fixture—which integrates a 0–25mm electronic digital micrometer with sub-micron resolution ($0.001\text{mm}$)—the analyzer eliminates contact gaps and thickness measurement errors, converting raw capacitance readings directly into absolute dielectric values via dedicated analysis software. With rich connectivity, including LAN, RS-232C, USB, and Handler interfaces, it seamlessly transitions from laboratory research to automated factory quality control.
Comprehensive Parameter Display: Simultaneously measures and displays parallel capacitance ($C_p$), dissipation factor ($D$), dissipation monitoring, voltage, and current values in real time.
Broad Frequency Selection: Supports adjustable test frequencies up to $1000\text{Hz}$ with a high frequency resolution of $0.001\text{Hz}$ to capture the subtle dielectric responses of materials.
Intelligent Calibration Mechanism: Features an advanced "User Calibration" menu supporting full-frequency open-circuit zero clearing to eliminate residual fixture capacitance and lead impedance.
Integrated Thickness Metrology: The S916 fixture features a built-in electronic micrometer ($0.001\text{mm}$ resolution, $\pm0.003\text{mm}$ accuracy) with a metric/imperial one-key toggle and a relative zero button, linking physical thickness ($d$) directly with electrical calculation.
Liquid Test Cup Adaptability: The lower plate of the parallel plate capacitor can be disassembled and swapped with optional 7mm or 32mm deep liquid cups for precise fluid dielectric evaluation using the capacitance-area formula:
$$\varepsilon_r = \frac{C}{\varepsilon_0} \cdot \frac{d}{S}$$Ultra-Thin & Sticky Material Handling: Outlines detailed procedures for applying foil electrodes ($D_x$) and stacking micro-thin films (e.g., stacking 30 layers for $50\mu\text{m}$ film) to prevent accuracy degradation.
Rich Component Sorting (Handler Interface): Outputs pass/fail comparator results via the Handler interface to easily set up automated components or material sorting systems.
One-Touch Screenshot & Data Export: Front-panel USB interface enables a one-key screen capture (PrtSc) directly to a flash drive, ensuring easy logging of test curves and text data.
Versatile Communications: Outfitted with standard RS-232C, USB, and optional LAN and GPIB interfaces to easily establish parallel communication and remote control with PCs.
Measurement Modes: Parallel Capacitance ($C_p$- $D$), Serial Capacitance ($C_s$- $D$), and customizable combination sweeps.
Frequency Range: Up to $1000\text{Hz}$ (Default unit: Hz)
Accuracy ($0\text{Hz} \sim 65\text{Hz}$): $<\pm0.001\text{Hz}$
Accuracy ($65\text{Hz} \sim 450\text{Hz}$): $<\pm0.01\text{Hz}$
Accuracy ($450\text{Hz} \sim 1000\text{Hz}$): $<\pm0.02\text{Hz}$
Resolution: $0.001\text{Hz}$
Micrometer Spec (S916): Range: 0–25mm | Resolution: $0.001\text{mm}$ | Indication Error: $\pm0.003\text{mm}$.
Time Counter Range: $10\text{ms} \sim 9999.999\text{s}$ | Resolution: $1\text{ms}$.
Host Display: 10.1-inch or 7-inch $800 \times 480$ TFT color LCD with 6 interactive softkeys.
Testing Terminals: 4-terminal pair configuration ($H_{cur}$, $H_{pot}$, $L_{pot}$, $L_{cur}$) to suppress electromagnetic coupling.
Binary Inputs/Outputs: 1 pair of inputs (0–250V adaptive) and 1 pair of outputs (DC 250V / 0.5A capacity) with response times $<100\mu\text{s}$.
Power Supply: AC 220V/110V switchable ($\pm15\%$ deviation allowed), $47\text{Hz} \sim 65\text{Hz}$.
Dimensions & Weight: $239\text{mm} \times 41\text{mm} \times 170\text{mm}$ | Weight: 2.5kg.
Working Environment: Operating Temp: $0^\circ\text{C} \sim 40^\circ\text{C}$ (Storage: $-20^\circ\text{C} \sim 70^\circ\text{C}$) | Humidity: $\le 80\%\text{ RH}$.
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