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| Brand | Zhonghang Dingli |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | LJD-C High-Frequency Dielectric Constant Analyzer |
| Price | USD 3,500 (FOB Beijing) |
| Brand | Zhonghangdingli |
|---|---|
| Origin | Beijing, China |
| Model | QS87 |
| Capacitance Range | 0.1Cₙ to 1000Cₙ (7-digit resolution) |
| tanδ Range | −110% to +110% |
| tanδ Accuracy | ≤ 0.2% rdg ± 1×10⁻⁵ |
| tanδ Resolution | 1×10⁻⁶ (1×10⁻⁷ with PC interface) |
| Test Voltage | 0–1000 kV (±1%, 4-digit display) |
| Frequency Range | 35–65 Hz (±1 Hz, 4-digit display) |
| Optional capacitance range extender extends ratio from 1000 | 1 to 10⁶:1 |
| Brand | Zhonghang Dingli |
|---|---|
| Origin | Beijing, China |
| Model | LJD Series Direct-Reading |
| Measurement Principle | Resonant Frequency Shift Method (Q-Meter Based) |
| Frequency Range | 10 kHz – 10 MHz (typical for LJD-B/C variants) |
| Capacitance Measurement Range | 0.1 pF – 2.5 µF (LJD-B), 0.1 pF – 25 nF (LJD-C) |
| Resolution | 0.1 pF |
| Dielectric Loss Tangent (tan δ) Accuracy | ±0.0001 (at optimal Q > 100) |
| Compliance | Designed per GB/T 1409–2006 (Chinese national standard equivalent to IEC 60250), supports ASTM D150 and ISO 257-1/2 test methodologies |
| Key | Brand: Zhonghang Dingli |
|---|---|
| Origin | Beijing, China |
| Model | ZHDL-200 Series |
| Motor Power | 3.0 kW (Panasonic) |
| Speed Range | 0.1–120 rpm |
| Torque Range | 0–200 N·m (rated 300 N·m) |
| Torque Accuracy | ±0.3% F.S. |
| Melt Pressure Range | 0.1–100 MPa |
| Pressure Accuracy | ±0.3% F.S. |
| Temp Control Range | Ambient to 350 °C (5-zone control, 6-point measurement) |
| Temp Accuracy | ±0.1 °C |
| Data Acquisition Rate | 50 Hz |
| Mixer Volume | 60 mL |
| Rotor Type | Roller (Banbury/Cam/Delta optional) |
| Heating Power | 2.1 kW (3×700 W) |
| Voltage | AC 380 V, 7.5 kW |
| Brand | Zhonghang Dingli |
|---|---|
| Origin | Beijing, China |
| Model | QS87 / QS37 Series |
| Capacitance Range | 0.1Cₙ to 1000Cₙ (7-digit resolution) |
| tgδ Range | −110% to +110% |
| tgδ Accuracy | ≤ 0.2% rdg ± 1×10⁻⁵ |
| tgδ Resolution | 1×10⁻⁶ (1×10⁻⁷ with PC interface) |
| Test Voltage | 0–1000 kV (±1%, 4-digit display) |
| Frequency Range | 35–65 Hz (±1 Hz, 4-digit display) |
| Optional Capacitance Ratio Extender (1000 | 1 → 10⁶:1) |
| Brand | Zhonghang Dingli |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | LJD-C |
| Price | USD 3,950 (FOB Beijing) |
| Brand | Zhonghang Dingli |
|---|---|
| Origin | Beijing, China |
| Model | LJC-50KV |
| Output Voltage | AC/DC 0–50 kV |
| Power Rating | 5 kVA |
| Voltage Ramp Rate | 10–5000 V/s |
| Electrode Configurations | Ø25 mm (pair), Ø75 mm (single) |
| Protection Features | Overcurrent, Undervoltage, Leakage, Short-Circuit, DC Discharge Interlock |
| Compliance | GB/T 1408.1–2006, GB/T 1695–2005, GB/T 3333–1999, HG/T 3330–2003, GB 12656–1990, ASTM D149–2022 |
| Dimensions (Main Unit) | 900 × 800 × 1500 mm (L×W×H) |
| Weight | ~100 kg |
| Brand | Zhonghang Dingli |
|---|---|
| Origin | Beijing, China |
| Model | QS37a |
| High-Voltage Source | 0–2500 V (50 Hz), 0–20 mA |
| Built-in Standard Capacitor | 100 pF (tanδ < 5×10⁻⁵) |
| Measurement Principle | Schering Bridge (Classical Westinghouse/Schering configuration, “direct connection” method for ground-insulated specimens) |
| Capacitance Range (Cₙ = 100 pF, R₄ = 3183.2 Ω) | 40 pF – 20,000 pF ±(0.5% Cₓ + 2 pF) |
| Dissipation Factor Range (tanδ) | 0–1 ±(1.5% tanδₓ + 1×10⁻⁴) |
| Alternate Range (R₄ = 318.3 Ω) | Cₓ = 4–2000 pF |
| Electrode System | Three-terminal guarded electrode per GB/T 1409—2006 (IEC 60250), measuring electrode Ø50 mm (19.6 cm²), guard gap adjustable 0–5 mm, null tanδ ≤ 3×10⁻⁵ at 2000 V |
| Operating Ambient | 20 ± 5 °C, RH 65 ± 5% |
| Dimensions | Ø210 × H180 mm |
| Weight | 6 kg |
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