TH0490 Bisector Current Ratio Standard
The TH0490 Bisectional Current Ratio Standard Series is engineered for precision broadband current measurement and calibration. It divides an input AC or DC current into two equal, phase-matched output channels with extremely small ratio deviation and phase displacement. The TH0490 is ideal for metrology institutes, R&D environments, calibration laboratories, and automated precision measurement systems requiring high accuracy up to 5kHz and 100kHz bandwidth versions.
| Model | TH0490-5kHz | TH0490-100kHz |
|---|---|---|
| Function | Current Ratio Standard (up to 5kHz) | Current Ratio Standard (up to 100kHz) |
| Nominal Input Current Range | 100 mA — 20 A | 100 mA — 20 A |
| Bandwidth | 53 Hz — 5000 Hz | 53 Hz — 100 kHz |
| Ratio Measurement Uncertainty (k=2) | ≤ 3–15 ppm depending on current and frequency | ≤ 4–18 ppm depending on current and frequency |
| Phase Displacement Error (k=2) | ≤ 3–15 µrad depending on load and frequency | ≤ 4–18 µrad depending on load and frequency |
| Loop Load | 5 Ω — 20 Ω (model dependent) | 5 Ω — 20 Ω (model dependent) |
| Application Type | Low to mid-frequency calibration | High-frequency precision metrology |
Key Features
- Precision bisectional current output with minimal ratio deviation
- Extremely low phase displacement ensures accurate vector measurement
- Wide frequency coverage up to 5 kHz or 100 kHz depending on model
- Compatible with reference-grade calibrators, power analyzers, and metering systems
- Ideal for high-accuracy AC/DC ratio calibration and measurement traceability
- Supports low load impedance design for minimal signal loss
- Stable long-term metrological characteristics suitable for national standards labs
- Engineered for automated calibration benches and precision measurement systems
- Optimized for harmonic, phase shift, and wideband electrical parameter testing