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
| Type | VC 21 (VC21D) |
| Frequencies | 15.92 Hz, 40 Hz, 80 Hz, 159.2 Hz, 320 Hz, 640 Hz, 1280 Hz |
| Acceleration | 1 m/s2, 2 m/s2, 5 m/s2, 10 m/s2, 20 m/s2 (frequency dependent) |
| Accuracy | ±3% at 10 to 40°C; 5% at -10 to 55°C |
| Maximum sensor load | 500 gram |
| Sensor Mounting | M5; Thread adaptors included |
| Display | OLED |
| Power Supply | Built-in rechargeable battery with external Mains Adaptor (Charger) |
| Displacement Sensor attachment | VC21D only |
| Keyphasor signal outout | VC21D only |
Last Updated on January 21, 2026 by Invicom Webmaster
