The voltage signals which exported by AE sensors are as low as a few microvolts. This kind of weak signals, once transmitted through long distance, strength could be reduced inevitably. Thus we should magnify the original signal to several times, usually the amplification factor is 40dB, then transfer it to signal acquisition system through coaxial-cable. The preamplifier is artificial circuit , its input is the voltage signal which is exported by the AE sensors, its output is analog signals which have been magnified.
AE Preamplifier needs to be equipped with impedance matching and transformation function. In order to prevent impacts which are caused by too large input signal, also AE Preamplifier should be equipped with protection capacity against electric shock and recoverability anti-blocking phenomenon, also UOPP is relatively large.
● PAS AE preamplifier series are wideband and universal models, which can match with most common sensor models and AE acquisition cards for each factory；
●Built-in magnetic fixture, can adsorbed on magnetic materials；
●Phantom power supply, the power supply is carried by the signal line;
●Be equipped with protection capacity against electric shock and recoverability anti-blocking phenomenon;
●AST (Automatic sensor test) function, can send out test signal resource to the sensors ( under the condition of phantom power supply)；
● Metal shall, shield electromagnetic interference ，resist shock；
Remarks: once user’s acquisition card is general data acquisition card without power supply, he or she can choose our preamplifier accessories.
Noise: ＜26dB (input end is short-circuited)
Output range: ±10V Vpp
Power supply voltage: 28V DC
Rated load: 50Ω
Working temperature: -20℃～﹢60℃
Size: 116mm×36mm×30mm(including BNC interface)
Protection level: IP65
Working temperature: -20℃～60℃
Shell material: cast aluminium
Protection class: IP65
Connecting way of AE sensor、AE preamplifier