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1.Introduction
This high-frequency test system for insulating materials is composed of S916 test fixture, high-frequency Q meter, built-in data acquisition & automatic tanδ measurement software module, and HLK-1 inductors.
It is designed and manufactured in compliance with GB/T 1409-2006, GB/T 1693-2007, ASTM D150 and IEC 60250 standards.
The system provides an optimal solution for automatic testing of high-frequency dielectric loss tangent (tanδ) and dielectric constant (ε) of insulating materials.
A parallel-plate capacitor fixture is used to clamp test samples, matched with Q meter as the reading unit. The dielectric loss tangent is calculated by formula based on Q value difference (sample loaded / unloaded) and sample thickness reading.
The digital Q meter can automatically compute and display dielectric constant (ε) and dielectric loss (tanδ).
2.System Composition
2.1 Main Unit: High Frequency Q Meter
| Function Item | Specifications |
| DDS Digital Synthesized Signal Source Frequency Range | 10KHZ–70MHz |
| Frequency Coverage Ratio of Signal Source | 7000:1 |
| Signal Source Frequency Accuracy (6 significant digits) | 3×10⁻⁵ ± 1 digit |
| Q Factor Measuring Range | 1~1000, auto / manual range switching |
| Q Factor Resolution | 4 significant digits, resolution: 0.1 |
| Q Factor Measuring Error | ＜5% |
| Inductance Measuring Range (4 significant digits, resolution: 0.1nH) | 1nH ~ 8.4H, resolution: 0.1nH |
| Inductance Measuring Error | <5% |
| Tunable Main Capacitance | 30–550pF |
| Direct Capacitance Measuring Range | 1pF ~ 2.5μF |
| Tunable Capacitance Error / Resolution | ±1 pF or ＜1% / 0.1pF |
| Resonance Point Search Function | Automatic Scanning |
| Preset Qualified Q Range | 5–1000 with audible & visual alarm prompt |
| Q Range Switch Mode | Automatic / Manual |
| Parameters Displayed on LCD Screen | F, L, C, Q, Lt, Ct, tn, etc. |
| Auto Deduction for Residual Inductance of Unit & Test Leads (Exclusive Design) | Available |
| Direct Reading for Large Capacitance (Exclusive Design) | Max measurable value: 2.5μF |
| Measurement Precision of Dielectric Loss Factor | 0.05% |
| Measurement Precision of Dielectric Constant | 0.1% |
| Testable Sample Thickness | 0.1mm – 10mm |
| USB Communication Interface | Supported |
2.2 S916 Digital Test Fixture for Dielectric Constant εr & Dissipation Factor tanδ
2.3 HLK-1 Inductor Set
| No | Inductance | Inductance% | Min.Q Factor | Distributed Capacitance | Resonance Frequency Range (MHz) | Applicable Test Frequency |
| 1 | 0.1μH | ±0.05μH | 200 | 5pF | 20~70 | 50MHz |
| 2 | 0.5μH | ±0.05μH | 200 | 5pF | 10~37 | 15MHz |
| 3 | 2.5μH | ±5% | 200 | 5pF | 4.6~17.4 | 10MHz |
| 4 | 10μH | ±5% | 200 | 6pF | 2.3~8.6 | 5MHz |
| 5 | 50μH | ±5% | 200 | 6pF | 1~3.75 | 1.5MHz |
| 6 | 115μH | ±5% | 200 | 6pF | 0.75~2.64 | 1MHz |
| 7 | 1mH | ±5% | 150 | 8pF | 0.23~0.84 | 0.5MHz |
| 8 | 5mH | ±5% | 130 | 8pF | 0.1~0.33 | 0.25MHz |
| 9 | 14mH | ±5% | 90 | 8pF | 0.072~0.26 | 0.1MHz |
© Dongguan Zhongli Instrument Technology Co., Ltd.
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