Variable capacitance accelerometer provides high thermal stability and global accuracy
The Endevco model 7290D variable capacitance accelerometer is designed to provide very high thermal stability and global accuracy as is typically required for flight test and similarly challenging test environments.
It utilizes a patented variable capacitance sensing element. Gas damping and internal overrange stops enable the anisotropically etched silicon-sensing element to withstand high shock and acceleration loads.
Included in the 7290D is a custom signal conditioner enabling the device to operate with a nominal excitation of 8.0 Vdc to 30.0 Vdc and providing a high level, low impedance output. The ±2.25 volt differential output (single-ended output optional) is DC coupled at a DC bias of approximately 2.5 V. In order to maintain stringent thermal characteristics and high accuracy, a custom ASIC provides factory programmable temperature compensation. Additional features include 2 to 100 g full scale range, 2.5% total dynamic accuracy, and up to 10,000 g shock survivability.
All compensation and adjustments are incorporated within the accelerometer and no post-processing is required. The compensation is accomplished via a five point linear fit algorithm for both Thermal Sensitivity Shift and Thermal Zero Shift. The 7290D includes a Transducer Electronic Data Sheet (TEDS) conforming to IEEE 1451.4 that stores serial number and calibration information.
Click here to download product data sheet
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