Credit: MB Dynamics
MB Dynamics has introduced the Model CAL25HF high-frequency electrodynamic air bearing vibration exciter.
The Model CAL25HF offers improved transverse performance over traditional flexural-based calibration exciters, with reliable operation over an operating bandwidth of 3Hz to 20kHz. It is available as either a stand-alone unit, or as part of a larger automated calibration test system. The high-reliability air bearing design of the Model CAL25HF incorporates a lightweight Beryllium (Be) armature and removable Be Test Instrument Mounting Fixture (TIMF), for the necessary high stiffness, low mass and high resonant frequency required for accurate, repeatable performance. Pneumatic-based automatic payload re-centering helps to mitigate the risks of unwanted noise on the armature. The Model CAL25HF further features an IEPE internal reference accelerometer with 20mV/g sensitivity (optional 100mV/g), not built into the armature.
The internal reference accelerometer offers a <1Hz to 55kHz usable frequency range, 70kHz mounted resonance and extremely low sensitivity to thermal drift. Back-to-back calibrations of the Model CAL25HF are performed by comparing Device-Under-Test (DUT) output to known reference accelerometer output values. The Model CAL25HF is compliant with ISO 16063-21, Clauses 4.3 and 4.4, with its transverse motion specifications meeting ISO 16063-21.
Typical applications for the Model CAL25HF include high-volume accelerometer calibrations, sensor manufacturing quality assurance testing, and in-laboratory R&D instrumentation verifications. Units are designed to accurately calibrate accelerometers and vibration sensors with diameters of up to 70 millimeters and weights of up to 910g. The Model CAL25HF is one of three high-performance air bearing exciters available from MB Dynamics. Each offers low cross-axis sensitivity and low distortion motion performance.
Other offerings include the Model CAL25AB, operating to 15kHz; and the Model CAL12AB, operating to 15kHz, with lower rated force output. Please consult the factory for additional product details.
Founded in 1939, the privately held, Cleveland, Ohio-based MB Dynamics has a nearly 80-year field proven history as a reliable total solutions provider for vibration test requirements. The company applies its vast wealth of experience in vibration testing and instrumentation to offer a truly one-of-a-kind innovative approach to customer problem-solving in automotive, aerospace, industrial, laboratory R&D, civil engineering, modal and structural testing, general test and measurement, academia, and other sectors.
All solutions offered by MB Dynamics are accompanied by the necessary hardware and software to ensure seamless integration, along with the value-added benefits of full applications engineering support, available from one of the industry’s most experienced teams. This expertise is made available to MB Dynamics customers locally in more than a dozen countries.
