CMAC 5056, SKF, Modal analysis hammer kit (KIT, HK-1 MODALLY TUNED HAMMER, CMXA70)

Features
• Frequency range up to 8 kHz
• Peak force 2 200 N (500 lb. ft.)
• Output 2,25 mV/N (10 mV/lb. ft.)
• Mass extender to provide additional force
These calibrated modal hammer kits may be used for impulse testing of the dynamic behavior of mechanical structures by striking the object with the hammer and measuring the resulting response with the accelerometer. The hammer imparts a constant force over a broad frequency range, which depends on the type of tip used. The hammer has an integral, constant current quartz force sensor mounted on the striking end of the hammer head. The sensor converts the impact force into electrical signal for display and analysis.

It is designed with rigid quartz crystals and a built-in, microelectronic, unity gain amplifier. Due to the laser-welded construction of the sensor element, operation is reliable in adverse environments.
The striking end of the hammer has a threaded hole for installation of a variety of impact tips that are included in the kit. The tip transfers the impact force to the sensor and protects the sensor face from damage. Tips of different stiffness allow the variation of the pulse width and correspondingly the frequency content of the force.

Modal analysis and modeling is also available by fixing the accelerometer at one location, impacting the structure at one point and then moving the accelerometer to other points of interest. When used with the FRF module, the following modal parameters can be calculated and displayed:
• Apparent mass / accelerance
• Impedance/Mobility
• Stiffness/Compliance

Specification