DONGGUAN LONROY EQUIPMENT CO LTD
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ASTM D 150 Permittivity Tester Ceramics Composites Dielectric Constant Meter
1.Description:
The LRTD high-frequency insulation material dielectric constant and dielectric loss testing system consists of a testing device (clamping fixture), a high-frequency Q-meter, data acquisition and tanδ automatic measurement control (software module incorporated into LRTD), and an inductor. It is designed and manufactured in accordance with the national standards GB/T 5594.4-2015 "Test methods for performance of structural ceramic materials of electronic components - Part 4: Test methods for dielectric constant and dielectric loss tangent value", GB/T 1693-2007 "Determination of dielectric constant and dielectric loss tangent value of vulcanized rubber", GB/T 1409-2006, GB/T 1693-2007, American standard ASTM D150, and International Electrotechnical Commission IEC 60250. The system provides the best solution for automatic measurement of the high-frequency dielectric loss tangent value (tanδ) and dielectric constant (ε) of insulation materials. The testing device in this instrument is composed of a flat capacitor, which is generally used to clamp the tested sample and is equipped with a Q-meter as an indicating instrument. The dielectric loss tangent value of the insulation material is calculated by the change in Q value and the scale reading of thickness when the tested sample is placed in the flat capacitor and when it is not placed. Using the LRTD digital Q-meter enables automatic calculation of dielectric constant (ε) and dielectric loss (tanδ).
2.Configuration:
Includes 1 LRTD-C test host, 1 sample fixture, and 1 set of inductors (10 pieces). Optional liquid cup is available for testing liquid materials.
3.Technical Parameter
System composition of the LRTD dielectric constant/loss test system:
Main unit: High-frequency Q-meter
| Feature Category | Parameter | Specification / Value | Notes |
| Source | Signal Source Type | DDS Digitally Synthesized Signal | |
| Frequency Range | 100 kHz - 160 MHz | ||
| Frequency Coverage Ratio | 16000:1 | ||
| Frequency Accuracy | 3 × 10⁻⁵ ±1 count (6 significant digits) | ||
| Sampling | Sampling Accuracy | 12-BIT | Ensures Q stability & low Df material testing stability |
| Q Measurement | Q Measurement Range | 1 - 1000 | Auto/Manual Range |
| Q Resolution | 0.1 (4 significant digits) | ||
| Q Measurement Error | < 5% | ||
| Inductance (L) Measurement | L Measurement Range | 1 nH - 140 mH | Resolution 0.1 nH (4 significant digits) |
| L Measurement Error | < 3% | ||
| Tuning Capacitor | Main Capacitance Range | 17 pF - 240 pF | High-precision silver-plated monolithic structure |
| Capacitance Auto-Search | Yes | With stepper motor | |
| Direct C Measurement Range | 1 pF ~ 25 nF | ||
| Tuning Capacitor Error | ±1 pF or < 1% | ||
| Tuning Capacitor Resolution | 0.1 pF | ||
| Resonance | Resonance Point Search | Auto Scan | |
| Q Features | Q Pass/Fail Preset Range | 5 - 1000 | Audible/Visual Indication |
| Q Range Switching | Auto/Manual | ||
| Display (LCD) | Displayed Parameters | F, L, C, Q, Lt, Ct, tn, Σr | F=Freq, L=Ind, C=Cap, Q=Quality Factor, Lt/Ct=tuned, tn=?, Σr=Series R? |
| Unique Features | Auto Residual Inductance Deduction | Yes | Residual inductance & lead inductance (Unique) |
| Large Capacitance Direct Display | Yes | Up to 25 nF (Unique) | |
| Material Testing | Dissipation Factor (Df) Accuracy | 0.01% (1/10,000) | |
| Permittivity (εᵣ) Accuracy | 0.1% (1/1,000) | ||
| Material Thickness Range | 0.1 mm - 10 mm | ||
| Permittivity Display | Directly on LCD | ||
| Dissipation Factor Display | Directly on LCD | ||
| Permittivity Test Frequency Range | 100 kHz - 100 MHz |
Dielectric constant εr and dielectric loss factor tanδ testing device:
| Feature | Specification | Notes | |
| Solid Samples | Measurement Diameter | Ø 38 mm | |
| Thickness Range | Adjustable, < 15 mm | Typical range | |
| Electrode Plates | Customizable | (Optional customization) |
Inductors
| No. | Inductance (L) | Accuracy | Q Factor ≥ | Approx. Distributed Capacitance (C<sub>d</sub>) | Resonance Frequency Range (MHz) | Recommended Frequency for Permittivity Test |
| 1 | 0.1 μH | ±0.05 μH | 200 | 5 pF | 31 - 103 | 50 MHz |
| 2 | 0.5 μH | ±0.05 μH | 200 | 5 pF | 14.8 - 46.6 | 15 MHz |
| 3 | 2.5 μH | ±5% | 200 | 5 pF | 6.8 - 21.4 | 10 MHz |
| 4 | 10 μH | ±5% | 200 | 6 pF | 3.4 - 10.55 | 5 MHz |
| 5 | 50 μH | ±5% | 200 | 6 pF | 1.5 - 4.55 | 1.5 MHz |
| 6 | 100 μH | ±5% | 200 | 6 pF | 1.06 - 3.20 | 1 MHz |
| 7 | 1 mH | ±5% | 150 | 8 pF | 0.34 - 1.02 | 0.5 MHz |
| 8 | 5 mH | ±5% | 130 | 8 pF | 0.148 - 0.39 | 0.25 MHz |
| 9 | 10 mH | ±5% | 90 | 8 pF | 0.107 - 0.32 | 0.1 MHz |
| 10 | 14 nH | ±5% | 100 | 5 pF | ~100 MHz | 100 MHz |