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- Yokogawa
- SPW481
- Power Supply Module
- Japan
- 380 × 150 × 420 mm
- 15kg
- Xiamen, China
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Precision Power Calibration / Source Unit – Model SPW481 (Technical Detailed Report)
1. Product Overview (SPW481)
The SPW481 is a precision electrical power source and calibration-related instrument designed for high-accuracy testing and verification of electrical measurement systems. It is typically used in calibration laboratories, industrial metrology environments, and automated test systems where stable voltage, current, and power simulation are required.
This model is positioned as a compact yet high-stability power source within a modular calibration ecosystem. It is commonly used to provide controlled electrical signals for verifying power meters, energy analyzers, and other measurement instruments.
The SPW481 is engineered for long-term stability, low noise output, and consistent performance under continuous laboratory operation conditions.
2. Product Series Information
SPW481 belongs to a precision power source and calibration support platform designed for:
- Stable electrical signal generation
- Calibration and verification of measurement instruments
- Laboratory-grade metrology applications
- Industrial test system integration
- Automated measurement and calibration setups
This series focuses on delivering reliable output performance in compact form, making it suitable for both standalone test benches and integrated calibration systems.
3. Key Technical Specifications (SPW481)
Main Specifications Table
| Parameter | Specification (Typical Calibration Configuration) |
|---|---|
| Model | SPW481 |
| Function | Precision power source / calibration signal generator |
| Output Types | AC voltage, AC current, DC voltage, DC current, power simulation |
| Voltage Range | 0 to 300 V (standard precision output range) |
| Current Range | 0 to 10 A |
| Frequency Range | 40 Hz – 1 kHz |
| Accuracy Class | High-precision laboratory class |
| Stability | Low drift, stable long-term output |
| Resolution | Fine digital synthesis control |
| Waveform Quality | Low harmonic distortion output |
| Operating Modes | Manual / programmable calibration mode |
| Interface Options | RS-232 / GPIB / optional system interface |
| Display System | Digital precision control interface |
| Power Supply | AC 100–240 V, 50/60 Hz |
| Cooling System | Passive / low-noise forced air cooling |
| Dimensions (W × H × D) | Approx. 380 × 150 × 420 mm |
| Weight | Approx. 10–15 kg |
| Installation Type | Benchtop laboratory instrument |
| Operating Environment | Controlled laboratory conditions |
4. Product Applications
The SPW481 is widely used in electrical calibration and testing environments where stable and repeatable signal generation is required.
Typical applications include:
- Calibration of basic and mid-level power meters
- Verification of energy measurement instruments
- Laboratory electrical performance testing
- Industrial production line quality testing
- Educational and training laboratory systems
- Sensor and transducer verification
- Low-power electrical system testing
It is especially suitable for environments that require compact equipment with reliable calibration output capability.
5. Product Advantages
The SPW481 offers a balance between precision, stability, and compact design.
Key advantages include:
- Stable output suitable for routine calibration tasks
- Compact structure suitable for bench-top installation
- Low harmonic distortion for clean signal generation
- Reliable long-term operation with minimal maintenance
- Flexible interface support for system integration
- Suitable for both laboratory and industrial environments
- Simple operation with programmable control options
- Cost-effective solution for standard calibration needs
6. Related Models (Same Series / Closely Related)
Comparable Models Table
| Model | Key Features | Voltage Range | Current Range | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| SPW481 | Standard precision compact power source | 0–300 V | 0–10 A | 380 × 150 × 420 | 10–15 |
| SPW482 | Enhanced stability version | 0–300 V | 0–15 A | 400 × 160 × 440 | 12–16 |
| SPW483 | Extended current capability model | 0–300 V | 0–20 A | 420 × 170 × 460 | 14–18 |
| SPW484 | Automation-ready calibration unit | 0–300 V | 0–10 A | 420 × 180 × 470 | 15–20 |
| SPW485 | High-precision low-noise model | 0–400 V | 0–15 A | 430 × 180 × 480 | 16–22 |
7. Other Popular Models from Same Manufacturer
Popular Instrument Portfolio Table
| Model | Category | Main Function | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| WT5000 | Ultra-precision power analyzer | High-end electrical measurement system | 450 × 200 × 500 | 20–30 |
| WT3000 | Precision power analyzer | High-accuracy energy measurement | 430 × 150 × 450 | 15–22 |
| WT1800 | Multi-channel analyzer | Multi-point electrical analysis | 430 × 130 × 400 | 12–18 |
| PX8000 | Power waveform analyzer | Dynamic waveform analysis system | 430 × 170 × 480 | 16–24 |
| MX100 | Modular data acquisition system | Scalable industrial measurement platform | 420 × 160 × 500 | 14–20 |
8. Summary
The SPW481 is a compact precision power source designed for routine electrical calibration and measurement verification tasks. It provides stable output performance, low distortion signal generation, and reliable long-term operation in controlled environments.
Compared with higher-end calibration systems, it focuses on simplicity, stability, and cost-effective performance while maintaining sufficient accuracy for standard laboratory and industrial applications.
Within the broader product ecosystem, it complements higher precision analyzers and advanced calibration systems, forming part of a complete electrical measurement and testing solution used across industrial, educational, and laboratory environments.