Product Description

Model VC21D is a modified version of the VC21. It can calibrate, in addition to accelerometers and velocity transducers, noncontact displacement sensors, also called proximity or Eddy current probes. The instrument enables dynamic calibrations of such sensors. The VC21D provides the same frequencies and amplitudes as Model VC21. The only differences are its detachable clamping device for proximity probes and a TTL clock output via a BNC socket. This clock output can be useful to simulate a Keyphasor signal in monitoring systems. The clamping device has a movable, vibration isolated slider to adjust the height of the proximity probe above a vibrating disk made of 2CrMo4 reference steel. The probe is held by replaceable thread adapters which are available in the common probe sizes of M6x0.5, M8x1, M10x1, M14x1, M20x11/4”-28, 3/8”-24 and 1/2”-20. The clamping device was optimized for calibrations at 159.2 Hz. The clamping device is held by two magnetic sockets. After removing it the VC21D can be used like the standard VC21.