PCB Test & Measurement Seite 24

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PCB PIEZOTRONICS INC 716 684 0001 Fax 716 685 3886 For Additional Specification Information Visit www pcb com 22 High Temperature Accelerometers 500 ºF 260 ºC PCB s Charge Output accelerometers utilize piezo ceramic sensing elements to directly output an electrostatic charge signal that is proportional to applied acceleration Charge Output accelerometers do not contain built in signal conditioning electronics As a result external signal conditioning is required to interface their generated measurement signals to readout or recording instruments The sensor s charge output signals can be conditioned with either a laboratory style adjustable charge amplifier or for an economical approach with an in line fixed charge converter Since there are no electronics built into Charge Output accelerometers they can operate and survive exposure to very high temperatures up to 1200 F 649 C for some models In addition Charge Output accelerometers are used for thermal cycling requirements or to take advantage of existing charge amplifier signal conditioning equipment It is important to note that measurement resolution and low frequency response for charge output acceleration sensing systems are dependent upon the noise floor and discharge time constant characteristics of the signal conditioning and readout devices used Applications High Temperature Vibration Measurements Engine Compartment Studies Exhaust Component Vibration Tests Steam Turbine Testing Engine Vibration Analysis 2 T Mcatalog 2011 Seite 17 32 A4 F G500 21 04 11 09 06 Seite 22