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             monitoring
       ü High performance
             preamplifiers


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Acoustics Emission products : PC boards, systems, softwares, sensors, pind tester ...

From sensor to turnkey system, an answer for each need


ACOUSTIC EMISSION PREAMPLIFIERS

The output voltage of an AE sensor is usually very small (in millivolt or less), a preamplifier and/or postamplifier is needed to enlarge the signal before it feeds into an AE system or other signal processing equipment.
As applications and testing conditions vary along with customers needs, the applicable amplifier is also different. There are different ways to categorize the amplifiers

Preamplifier versus Postamplifier
An amplifier that is directly connected to an AE sensor in one end and to a post- amplifier or AE system in another end. DC power is needed and supplied either by the post-amplifier or the AE system. An amplifier that is directly connected to a preamplifier or a sensor (by option) in one end and to an AE system in another end. DC power is not required. Powered by 110 V or 220 V AC.
 

PREAMPLIFIERS 0/2/4  AND 2/4/6
 
  General purpose voltage preamplifier with 0/20/40 dB gain (0/2/4),
    or 20/40/60 dB gain (2/4/6), single-ended and differential sensor inputs,
    bandwidth changeable plug-in filter and Standard auto sensor test (AST)
 
Standard 28V DC power.
 
Wide dynamic range < 90dB standard
 
Temperature: - 40° C to + 65° C
 
Low noise <2 microvolts rti
 
Single power/signal BNC or optional separate power/signal BNC

 ILSerie OF PREAMPLIFIERS


The IL series of preamplifiers are small (~ 2,5 square x 5,5 cm long), low cost preamplifiers, that are available for those applications where there is a known specific preamplifier specification that will not be deviated from. They are available with a fixed frequency bandpass (various selections available), fixed gain (0, 20, 40 or 60 dB) and sensor connection type (single or differential), and the AST sensor pulsing option, each of which is specified at the time of purchase
 
Standard 28V DC power.
  Wide dynamic range < 90dB standard  
 
Low noise 2 microVolt rti
  Temperature: - 40° C to + 65° C
  ILXY                 X = gain 0, 20, 40, 60
                           Y = S o D single or differential

LINE DRIVERS


In circumstances where the required cable length exceeds the drive capability of the normal preamplifier, line drivers may be inserted to compensate for transmission loss and maintain the signal quality back to the main analysis instrument.

1224D Line Drivers - with amplification capabilities for boosting the AE signal 10/20 dB.

1226 Line Driver - provides impedance matching for transmitting AE signals over coaxial cables. It is battery operated and designed for use with Physical Acoustic's 5100 series of leak detections systems.
 

The 1276 & 1278 Intrinsically Safe Preamp/Sensors/Barrier


The 1276 & 1278 family of components are used in hazardous, gaseous environments that require class IIC, Intrinsically Safe (IS) apparatus. They are a direct replacement for the Physical Acoustics standard line of Sensors and 1276 & 1278 preamplifiers. The IS sensors (R6-IS, R15-IS and RWD-IS) and preamplifiers (1276 & 1278) are designed and certified for use within the hazardous area, while the barrier (1278B) is attached to the preamplifier and is installed outside the hazardous area where it is connected to the AE instrument. Therefore, this series of sensor and preamplifier is used when the AE system can be installed outside the hazardous area.

The 1276 & 1278 preamplifiers must be used in combination with the listed IS sensors and 1276B barrier. It features 20/40 dB selectable gain, pluggable High Pass and Low Pass filters and operates with PACs standard single Power/Signal BNC.

1222 CHARGE PREAMPLIFICATEUR

The 1222 Charge Preamplifier is used in cases where there is a need for long lengths of sensor input cable. Charge preamplifiers do not suffer from distance/attenuation effects like voltage preamplifiers do. The 1222 works with our entire range of single-ended sensors and features selectable 40/60 dB gain, standard PAC pluggable filters, bandwidths of 20 - 600 kHz and built-in test signal and control.  It is directly compatible with all PAC systems using the single Power/Signal AE input BNC connection.

              
Standard 28V DC power.
               Bandwidth 20 600 kHz (-1dB)
               Low noise 10 micro Volt rti
               Gain 40 / 60 (factory gain 40 dB)



1272LF low frequency: ideal for applications where there is a need for long lengths of sensor input cable. Particularly this preamplifier is used for loose part monitoring in nuclear industry.


 

  Sub-system dedicated to process monitoring

The Model 1272 RMS Alarm Subsystem was developed by PAC to use in conjunction with Acoustics Emission (AE) Systems in production and laboratory applications. Designed with the latest high performance, high reliability SMT components, the 1272 is designed to interface an AE sensor and preamplifier or integral sensor to an industrial controller or standard laboratory test equipment.  Its input is an AE preamplifier with phantom power (signal riding on the preamplifier power voltage).

     The 1272 gives the user a choice of four types of outputs.
     The amplified signal from the preamplifier input. The 1272 has internal
       jumper for setting the amplifier gain at 0 dB to 40 dB in 10 dB steps
     The RMS of the amplified AE signal. The RMS signal has a time constant
       set by an internal jumper. The time constants are 50 or 500 mS.
     Two Alarm outputs are available. Each alarm has a settable RMS threshold
 
      level.The low alarm threshold is factory set for 400 mV RMS and the high
       alarm threshold is factory set for 4.0 volts RMS. The alarm outputs are   
     
open drain (collector) output that can sink up to 0.05 amps. When the high
      threshold is exceeded the high output (output 1) will go low. When the low threshold is not exceeded the high output
      (output 1) will go low.
     The 1272 is also available with an optional 4 20 ma output for current loop monitoring of the RMS output.
 

    EA High performance AE2A/AE5A PREAMPLIFIERS

Physical Acoustics's AE2A/AE5A second generation series of AE Amplifiers are small, high-performance acoustic emission (AE) systems that amplify and filter an incoming AE signal either directly from an AE sensor or from an external preamplifier. The resulting high-frequency AE analog signal output can be connected to a variety of external monitoring and data acquisition instruments. The AE output is most commonly connected to an analog or digital oscilloscope in order to view a cause and response relationship.


  Bandwidth:
       10kHz -3 MHz for the le AE2A
       10kHz - 5Mhz for the AE5A

  Gain 0-41 dB by step of 3 dB
  Option RMS/ASL integration module.
  Option integrated preamplifier (no need of external preamplifier)


 

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