Impedance heads, ceramic and quartz, 5 … 50 g / 8770A
Family Type 8770A are impedance heads which simultaneously measure dynamic force and acceleration at a point on a test structure.
- Low impedance, voltage mode
- Sensitivity unaffected by mounting torque
- Measuring ranges: ±5 g and ±50 g
- Force and acceleration phase matched within two degrees
- Withstands up to 2500 g shock with 1 ms maximum duration
- Conforming to CE
A unique sensing element construction optimizes the capabilities of the 8770A impedance head. The result is a device which yields simultaneous dynamic acceleration and force measurements from exactly the same location on a test structure. Internal crystal isolation and tuned channel phase matching allows for the acquisition of Driving Point (DP) data with optimal spatial and temporal coincidence. During modal test studies, the importance of DP data is paramount since any error effects the scaled mode shapes directly. The required impedance transfer function can now be easily and accurately derived from the measurements made by this unique impedance head sensor.
Impedance Head Acceleration-Force Sensor