Meggitt Sensing Systems Endevco® Model 2221D Piezoelectric Accelerometer - Meggitt Sensing Systems - Measurement Group - #1

Text version of the page

Model 2221D Piezoelectric accelerometer Features Description • High output, 17 pC/g • Light weight (12 gm) • 360° cable orientation • Low profile • Vibration measurement on small structures The Endevco® Model 2221D is a piezoelectric accelerometer designed specifically for vibration measurement on small structures and objects. The unit is epoxy sealed and it is ideal for use in a controlled environment. Its light weight (12 gm) effectively minimizes mass loading. The accelerometer is a self-generating device that requires no external power source for operation. The Model 2221D features Endevco’s Piezite® Type P-8 crystal element operating in annular shear mode. This device exhibits excellent output sensitivity stability over time. Signal ground is connected to the outer case of the unit. When used with an isolated mounting screw, the accelerometer is electrically isolated from ground. A lownoise coaxial cable is supplied for error-free operation. The transducer has a centrally located thru bolt, allowing for 360° cable orientation. The unit may also be adhesive mounted if the application permits. Endevco signal conditioner Models 133 or Oasis 2000 computer-controlled system are recommended for use with this high impedance accelerometer. .168 (4.27) .140 (3.56) .363 (9.22) DIA TYPICAL AMPLITUDE RESPONSE 20 15 % DEVIATION 10 .600 (15.24) DIA 5 0 -5 -10 INSULATED MOUNTING SCREW ASSEMBLY 6-32 UNC-2A THD -15 IDENTIFICATION LABELS 1 10 100 -20 10000 1000 FREQUENCY IN HERTZ MATES WITH ENDEVCO 3000 SERIES CABLES WITH 10-32 UNF-2B CONNECTOR TYPICAL TEMPERATURE RESPONSE .15 (3.8) .017 (.43) .496 DIA (12.60) 40 TYPICAL CAPACITANCE 30 20 10 0 CHARGE SENSITIVITY INSULATED MOUNTING SURFACE (HARD ANODIZED ALUMINUM) -100 STANDARD TOLERANCE INCHES (MILLIMETERS) .XX = +/- .02 (.X = +/- .5) .XXX = +/- .010 (.XX = +/- .25) 50 % DEVIATION .315 (8.00) .17 (4.3) .49 (12.4) (-73) -50 0 50 (10) 100 150 200 250 300 (93) -10 -20 350 (177) TEMPERATURE oF ( oC) cmyk