I am interested in the software version that does not pause when changing frequencies.
I would also like to to know if a sweep can be made from the higher freq to the lower one. The sweep as it is now spends most of its time in the high range.
I would like to sweep from 10 hz to .01 hz in some number of minutes, lets say ten. As it is now I would be in what i consider the high frequencies (> .5 hz) most of the time.
I am trying to calibrate seismometers and most anything over 5 hz is hard to use when trying to move a heavy shake table.
The problem is that the sweep is linear - should be logarithmic.
Now the frequency steps are equal on all the frequency range. If logarithmic, then the sweep should be longer time on low frequencies.
Inverting the sweep direction will not help.
I think that in the next version of the software there will be a logarithmic sweep… quite soon (maybe next week, I think).
Thank you for the picture of your arrangements to calibrate seismometers. There in the folder seems to be more interesting pictures with the explanation of the instruments you use.
Please wait a little and you’ll get a better sweep function…
The log sweep will be great. I realize that the sweep direction does not matter in that it is just that some of the calibration software seems to work better from high to low, I have no idea why, the manuals just say it does. (old fortran programs)
If you can please email me the new software directly when it is done.
this shake table project has been fun and it is real neat to see the table perform the sweep. The calibration is then easy, I measure the real table displacement and what the seismometer thinks it moves. I get what is called the “generator constant” for the entire sensor/amps/digitizer system.
