Ask the experts

June 1, 2016

Question I’m confused by the DC bias output voltage specification on your ISOTRON accelerometers, particularly as this voltage is shown to vary over temperature. Can you explain the significance of this specification and how it affects the user? Answer First it should be noted that if your data acquisition system (DAQ) is supplying the minimum […]

April 1, 2016

Question What is necessary to understand about my cable length in order to maximize my available frequency response when using ISOTRON/IEPE accelerometers? Answer The high frequency response of your ISOTRON/IEPE accelerometer or output run from your RCC (remote charge converter) is limited by available drive current, peak signal level and cable capacitance. These parameters are […]

March 1, 2016

Question My PR accelerometer seems to be broken. Is there any quick way to verify if it is an accelerometer or cable failure? Answer In acceleration shock measurements the two most destructive factors for an accelerometer are frequent excitations of its resonance, causing so called sensor ringing which may lead to the accelerometer’s stain gauge […]

February 1, 2016

Question I have to carry out a modal test in order to identify the dynamic properties of my test specimen. Is there any rule that could help me in selecting the right modal hammer with respect to e.g. specimen size and mass? Answer There is no fixed rule that would provide a clear indication which […]

January 1, 2016

Question What options are available to make use of my existing inventory of uniaxial piezoelectric accelerometers when a triaxial measurement is required at a single location? Previously I have not had requirements to make triaxial measurements at a single point, but now I am seeing more and more requirements based on new testing parameters. Are […]