A displacement wedge is used for measuring displacement/distance and works using the principal of persistence of vision. It is used as a method of ‘verification’ to establish that a vibration test system is doing what it should be, and not something unexpected due to incorrect input sensitivity set-up.
Step 1: Go into the software and enter the sensitivities of your transducers.
Step 2: Attach a displacement wedge to the head of the shaker.
Step 3: Run a Sine test (some typical values might be 0.1 in displacement pk-pk and 30 Hz for ED shaker. Values may be different if using a hydraulic system.)
Step 4: When the shaker comes up to level you will see the two lines blur. Confirm that the lines intersect each other at 0.1 in displacement.
Contact VR and ask us to mail you some free displacement wedges.