extreme environments Variable capacitance accelerometer • 2, 10, 30, 50 and 100 g full scale ranges • Motion, low frequency, tilt STANDARD TOLERANCE NCHES (MILLIMETERS: The Endevco® model 7290A Microtron® accelerometer family utilizes unique variable capacitance microsensors. The accelerometers are designed for measurement of relatively low level accelerations in aerospace and automotive environments. Typical applications require measurement of whole body motion immediately after the accelerometer is subjected to a shock motion, and in the presence of severe vibrational inputs. Gas damping and internal overrange stops enable the anisotropically-etched silicon microsensors to withstand high shock and acceleration loads. The model 7290A can operate from 9.5 V to 18.0 V and provide a high level, low impedance output. The +2 volt differential output is dc coupled at a dc bias of approximately 3.6 V. Frequency response is controlled by the near-critically damped sensors. The use of gas damping results in very small thermally-induced changes Endevco three-channel systems, model 136 or 436 are recommended as signal conditioner and power supply.

Model 7290A Variable capacitance accelerometer Specifications All values are typical at +75°F (+24°C) and 15 Vdc excitation unless otherwise stated. Calibration data, traceable to the National Institute of Standards, (NIST), is supplied. Dynamic characteristics Range [1] g ±2 ±10 Sensitivity mV/g 1000 ±50 200 ±10 Frequency response (± 5%) [2] Hz 0 to 15 0 to 500 Mounted resonance frequency Hz 1300 3000 Non-linearity and hysteresis % FSO typ (max) ±0.20 (±0.50) ±0.20 (±0.50) Transverse sensitivity [3] % (max) 2 2 Zero measurand output mV ±50 ±50 Damping ratio 4.0 0.7 Damping ratio change From...

Model 7290A Variable capacitance accelerometer Specifications All values are typical at +75°F (+24°C) and 15 Vdc excitation unless otherwise stated. Calibration data, traceable to the National Institute of Standards, (NIST), is supplied. Calibration Sensitivity (measured with 15 Vdc excitation) Frequency response Zero measurand output Transverse sensitivity 1 g and 5 Hz for -2 10 g and 100 Hz for all other ranges 1 g, 1 to 100 Hz for -2, 10 g, 20 to 10 000 Hz for all other ranges measured at room temp measured at 1 g (2) size 4, flat washers (2) 4-40 x 7/16 inch cap screws (1) hex wrench Optional...