PCB Test & Measurement Seite 127

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For Additional Specification Information Visit www pcb com PCB PIEZOTRONICS INC 716 684 0001 Fax 716 685 3886 125 Microphone Electrostatic Calibration Test base and enclosure isolates unit under test from ambient noise and adjusts for barometric pressures while voltage insertion generates excitation for reference comparative results Impact Hammer Calibration Pendulous mass and reference accelerometer provide dynamic calibration with reference to Newton s law F ma Hopkinson Bar Model 925A01 High amplitude shock sensors undergo linearity and zero shift tests with exposures to impact shocks of more than 100 000 g Hopkinson Bar Method high amplitude shock Wave propagation velocity reference Pneumatically propelled projectile impactor 100 000 g 981 000 m s2 amplitude range Tests amplitude response linearity and zero shift behavior Calibration Services Shock and Vibration Sensor Calibration Services Impact Hammer Calibration Services Pendulous Mass Method Quartz reference accelerometer Dynamic technique for improved accuracy Calibrates force hammers and impactors with head mass from 0 1 oz 2 9 gm to 12 lb 5 44 kg Acoustic Calibration Services Voltage Insertion Method IEC 1094 compliant mics Speakerphone calibrator A2LA accredited for sensitivity at 250 Hz 114 dB SPL Measurement uncertainty 0 20 dB Sensitivity vs pressure variation testing also available Electrostatic Actuator Frequency response test to 126 kHz 9 T Mcatalog 2011 Seite 125 166 SYN G500 21 04 11 18 04 Seite 131