Signal preamplifier PAV

voltageconditioningfor accoustic measurements

Description
The PAV acoustic emission preamplifier provides a fixed 40 dB gain and integrates an Automatic Sensor Testing (AST) function. Phantom-powered via the signal cable, it is compatible with most common AE sensors and acquisition boards. The cast-aluminum shell offers electromagnetic shielding and impact protection, while compact dimensions and a BNC-BNC connector simplify on-site installation.

Main Features

• Broadband universal preamplifier compatible with most common AE sensors and acquisition boards
• Fixed gain: 40 dB
• Phantom power supplied via the signal cable
• Automatic Sensor Testing (AST) to send a test signal to the sensor
• Cast-aluminum shell for electromagnetic shielding and mechanical protection

Technical Specifications
Gain: 40 dB
Response frequency: 10 kHz – 1200 kHz
Noise: ≤28 dB
Output range: ±10 V (Vpp)
Working voltage: 24 V – 30 V DC
Impedance: 50 Ω
Quiescent current: 20 mA
Maximum current: 100 mA
Working temperature: -20 °C – +60 °C
Size (D×W×H): 65 mm × 23 mm × 25 mm
Weight: 40 g
Protection level: IP62
Shell material: Cast aluminum
Connector: BNC-BNC

Notes
1. Ensure the preamplifier output impedance matches the input impedance of downstream instruments (AE acquisition units, DAQ, oscilloscope) to avoid gain and amplitude deviations.
2. When connecting to non-professional acquisition devices (DAQ, oscilloscope), provide an external power supply (PPS) if the device does not supply phantom power.
3. Avoid incorrect connections that can damage the preamplifier: a) input voltage ≈25% higher than specified; b) reversed input and output connections.

Technical summary

• Gain: 40 dB
• Bandwidth: 10 kHz – 1200 kHz
• Supply: 24–30 V DC (phantom)
• Noise: ≤28 dB
• Output: ±10 Vpp
• Interface: BNC-BNC
• Shell: Cast aluminum, IP62
• Size: 65×23×25 mm
• Weight: 40 g