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| Brand | Red Sun Instrument |
|---|---|
| Model | HRQS-37A |
| Measurement Principle | Schering Bridge (High-Voltage AC Null Detection) |
| Frequency | 50 Hz / 60 Hz (Power Frequency), Optional 100 Hz–10 kHz Range |
| Test Voltage | Up to 2.5 kV AC (RMS), Adjustable |
| Capacitance Range | 1 pF – 25 µF |
| Dissipation Factor (tan δ) Range | 0 – 1 |
| tan δ Accuracy | ±1.5% of reading ±0.0001 |
| Relative Permittivity (εᵣ) Resolution | 0.01 |
| εᵣ Accuracy | Derived from Cₓ/Cₙ with calibrated standard capacitor (Cₙ = 100 pF) |
| Temperature Control | Dual-zone PID-controlled heating (inner/outer chambers), simultaneous internal/external temperature monitoring |
| Compliance | ASTM D150-11, GB/T 1409-2006, GB/T 1693-2007, GB/T 5594.4-2015 |
| Data Output | Analog voltage signals + RS232 interface |
| Operating Environment | 20 ± 5 °C, 30–80% RH |
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