Meggitt Sensing Systems Endevco® Model 7264D very low mass piezoresistive accelerometer - Meggitt Sensing Systems - Measurement Group - #1

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Model 7264D Piezoresistive accelerometer Features Description • 40 000 Hz resonant frequency • Mechanical overtravel stops • Small size, rugged • Crash and shock testing • 2000 g full scale range • DC response - long duration transients The Endevco® model 7264D is a very low mass piezoresistive accelerometer weighing only 1 gram. This accelerometer is designed for crash testing, flutter testing, rough road testing and similar applications that require minimal mass loading and a broad frequency response. This accelerometer meets SAEJ211 specifications for instrumentation for impact testing and SAEJ2570 specification for anthromorphic testing. It is a direct replacement for the Endevco model 7264-2000 and 7264C in that the location of the center of seismic mass is the same. The model 7264D utilizes an advanced micromachined sensor which includes integral mechanical stops. This model has a greatly improved resonant frequency ( >40 000 Hz) and frequency response which captures more data and avoids spurious noise. The model 7264D has minimum damping, thereby producing no phase shift over the useful frequency range. With a frequency .400 response extending down to dc (steady state acceleration) this .200 (10.16) (5.08) Specified measuring long duration transient accelerometer is ideal for by customer .103 .100 (2.61) (2.54) shocks. 1.25 (31.8) TYP .055 (1.40) .200 (5.08) This accelerometer has a full bridge circuit with fixed resistors .25 (6.4) for shunt calibration. Full scale output is 400 mVCASE 10 Vdc with .188 .400 excitation. Each unit performs with < 1% transverse(4.78) sensitivity (10.16) and ZMO of < ± 25 mV. .24 HOUSING (6.1) Endevco model 136 DC differential voltage amplifier, model 4430A bridge conditioner, .156 DIA .305 (7.75) or Oasis 2000 computer-controlled system are recommended as signal conditioner and(3.96) .295 (7.49) power supply. CENTER OF SEISMIC MASS U.S. Patents 4,498,229 and 4,605,919 apply. DIRECTION OF POSITIVE OUTPUT .071 (1.80) DIA THRU .067 (1.70) .400 (10.16) Specified by customer .100 (2.54) 1.25 (31.8) TYP .103 (2.61) .055 (1.40) .200 (5.08) .25 (6.4) .100 (2.54) DIA CABLE, 4 COND #32 AWG S.P.C., TEFLON INS, BRAIDED S.P.C., SHIELD, SILICONE RUBBER OUTER JACKET. .200 (5.08) M1A R1A CASE GRN (+OUTPUT) CASE R1B .188 (4.78) HOUSING .400 (10.16) .24 (6.1) M1B .156 DIA (3.96) CENTER OF SEISMIC MASS .071 (1.80) DIA THRU .067 (1.70) BLK (-EXC) WHT (-OUTPUT) SCHEMATIC .305 (7.75) .295 (7.49) RED (+EXC) CABLE SHIELD STANDARD TOLERANCE INCHES (MILLIMETERS) .XX = +/- .03 (.X = +/- .8) .XXX = +/- .010 (.XX = +/- .25) DIRECTION OF POSITIVE OUTPUT .100 (2.54) DIA CABLE, 4 COND #32 AWG S.P.C., TEFLON INS, BRAIDED S.P.C., SHIELD, SILICONE RUBBER OUTER JACKET. M1A RED (+EXC) cmyk