Endevco® Model 22 World's Smallest Piezoelectric Accelerometer
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Endevco® Model 22 World's Smallest Piezoelectric Accelerometer - 1

The Endevco® model 22 Picomin™ is the world’s smallest piezoelectric accelerometer, designed specifically for vibration measurement on small objects such as scaled models, circuit boards, and disk drives. Its light weight (0.14 gm) effectively eliminates mass loading effects. The transducer is designed to have reverse polarity with respect to acceleration going into the mounting base. The accelerometer is a self-generating device that requires no external power source for operation. The model 22 features Endevco’s Piezite® type P-8 crystal element, operating in radial shear mode, which exhibits excellent output sensitivity stability over time. Signal ground is isolated from the mounting surface of the unit by a hard anodized surface. Specially designed low-noise coaxial cable is supplied for error-free operation. A tool is included in the shipping case to ensure proper removal of the cable and transducer in the field. Endevco signal conditioner models 133, 2775B or OASIS 2000 computer-controlled system are recommended for use with this high impedance accelerometer. Model 22 Piezoelectric accelerometer • NEW! 22-R available as replacement sensor • World’s smallest accelerometer • Extremely light weight (0.14 gm) • Adhesive mounting • Ground isolated • Scale model, circuit board, disk drive testing -20 -15 -10 -5 0 5 10 15 20 1 10 100 1000 10000 100000 % DEVIATION FREQUENCY IN HERTZ TYPICAL AMPLITUDE RESPONSE -30 -20 -10 0 10 20 30 -100 0 100 200 300 % DEVIATION TEMPERATURE oF ( oC) CHARGE SENSITIVITY TYPICAL CAPACITANCE TYPICAL TEMPERATURE RESPONSE (-73) (-18) (38) (93) (149) Features Description SERIALNUMBER STANDARD TOLERANCE INCHES [MILLIMETERS] .XX= ± .50 [.X = ± 12.7] .XXX = ± .010 [.XX = ± .25] .196 [4.98] [2.79] .110 .019 Ø .024 XXXX [.61] [.48] 6.00 [152.4] Ø.141 #1-64 UNC-2BTHD [3.58] MATES WITH ENDEVCO 3095A CABLE ENDEVCO 3003C CABLEASSEMBLY (REPLACEABLE) UNIT IDENTIFICATION cmyk

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Endevco® Model 22 World's Smallest Piezoelectric Accelerometer - 2

Specifications The following performance specifications conform to ISA-RP-37.2 (1964) and are typical values, referenced at +75¢ªF (+24¢ªC), 4 mA and 100 Hz, unless otherwise noted. Calibration data, traceable to National Institute of Standards and Technology (NIST), is supplied Dynamic characteristics Units Charge sensitivity Typical pC/g 0.40 Minimum pC/g 0.30 Frequency response See typical amplitude response Resonance frequency kHz 54 Amplitude response [1] ±5% Hz 5 to 10 000 ±1 dB Hz 3 to 12 000 Temperature response See typical curve Transverse sensitivity % 5 Amplitude linearity To...

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