Vibration Calibrators

Vibration calibrators are vibration exciters providing a sinusoidal mechanical output at constant frequency and magnitude. They are used to determine the sensitivity of vibration sensors and measuring chains. Metra has been manufacturing vibration calibrators for more than 5 decades. Today we offer a series of devices covering most applications of field calibration. Applications include:

• Test and sensitivity measurement of accelerometers and velocity transducers
• Test and sensitivity measurement of Eddy current probes (VC21D)
• Measurement of frequency response (VC120)
• Function test and fault finding in measuring chains and sensor cable installations
• Evaluation of sensor coupling parts The instruments are battery-powered making them suitable for both field and laboratory use.

Metra’s vibration calibrators are known to be robust and powerful devices. Their outstandingly high payload makes them a good choice for the excitation of heavy objects. Test objects are attached by an M5 threaded hole, by a magnet or adhesively. Metra’s vibration calibrators are supplied with a traceable calibration certificate. DKD calibration can be offered on demand.

Step

VC 21 (VC21D)

• Strongest Portable Accelerometer Calibrator
• 7 Step frequency
• 5 Steps Amplitude
• World’s first portable calibration source for frequencies from 15.92 to 1280 Hz
• Load independent
• Quartz Stabilized frequencies
• Traceable to PTB Standard
• VC21D is equipped with displacement sensor probe attachment to calibrate proximators and displacement sensors for journal bearings and shafts
• TTL clock output is provided to simulate key phasor signal

Technical Specifications