Keysight / Agilent / HP E1539A Strain Measurement SCP Module

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.