The Keysight E1539A Strain Measurement SCP Module is a high-precision strain gauge acquisition module for VXI systems, engineered for structural analysis, material testing, and transducer calibration. It supports full, half, and quarter bridge configurations with program-selectable bridge completion resistors and integrated self-calibration. The module delivers measurement rates up to 25 kSa/s via multiplexed output and 196 kSa/s for dynamic measurements, with strain resolution as low as 0.1 µε and RMS noise of 0.4 µε.
## Technical Specifications
**Strain Measurement Range** (±5V excitation, quarter bridge):
• ±200,000 µε
• ±50,000 µε
• ±12,500 µε
• ±3,125 µε
**Resolution & Noise:**
• Resolution: 0.1 µε minimum
• RMS Noise: 0.4 µε
**Bridge Excitation & Completion:**
• Excitation: User-supplied in 8-channel banks
• Completion Resistors: 120Ω/350Ω ±0.05%, TC ±5 ppm/°C
• Shunt Calibration Resistor: 50 kΩ ±0.1%, TC ±25 ppm/°C
**Measurement Accuracy:**
• Gain Accuracy: ±0.01% of reading
• Gain Error: ±0.01% of reading
• Voltage Offset: <1 mV
• Quarter Bridge Offset: 3 µε (±2 µV), ±4 °C of tare calibration
**Sampling Performance:**
• Multiplexed Output: Up to 25 kSa/s
• Dynamic Measurements: Up to 196 kSa/s
**Remote Operation:**
• Multiplexed Output: Up to 330 meters (1000 ft)
• Buffered Outputs: Up to 100 meters (300 ft)
**Environmental:**
• Operating Temperature: -5 °C to +55 °C
• Operating Humidity: 5% to 85% RH
## Key Features
• Full, half, and quarter bridge configuration support
• Internal self-calibration with 50 kΩ source
• Program-selectable shunt calibration resistors
• "Mx+b" linearization on all channels
• Low RMS noise with averaging capability
## Typical Applications
• Structural health monitoring and deformation analysis
• Material stress and fatigue testing
• Transducer calibration and validation
• Long-distance remote strain data acquisition
## Compatibility & Integration
Integrates with Keysight E1400 family VXI mainframes. Works with E1422A Remote Channel DAC Module for static measurements and E1432A/E1433A Digitizers for dynamic measurements.
