Astorite
Mechanical
- Mar 15, 2012
- 8
One of our products recently underwent a random vibration test at an external test house. The test was completed as per our test procedure (3 point control on the test fixture using a maximum control strategy with the location of the control and monitor lines as specified in the procedure). Following review of the results, everything is fine and the unit has undergone a post vibration RF functional check with no issues.
However, the test report details of the ISP control accelerometers used and they have different sensitivity values (2 @ 10mv/g & 1 @ 100mv/g). My limited understanding is that sensitivity of the control acc should be based on the input spectrum in order to ensure that the test doesn’t exceed exceed the limits of the acc (and conversely, ensure the output is sufficiently large). However, how do you verify the ‘correct’ acc has been used?
Are there any issues with mixing acc of different sensitivities? Presumably for the same test criteria, the higher sensitivity acc has a higher potential to be overloaded than the lower sensitivity acc ones?
Thanks for help as the above is outside my usual field
G
However, the test report details of the ISP control accelerometers used and they have different sensitivity values (2 @ 10mv/g & 1 @ 100mv/g). My limited understanding is that sensitivity of the control acc should be based on the input spectrum in order to ensure that the test doesn’t exceed exceed the limits of the acc (and conversely, ensure the output is sufficiently large). However, how do you verify the ‘correct’ acc has been used?
Are there any issues with mixing acc of different sensitivities? Presumably for the same test criteria, the higher sensitivity acc has a higher potential to be overloaded than the lower sensitivity acc ones?
Thanks for help as the above is outside my usual field
G
