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Posts: 1,809
Reply with quote  #1 
I recently acquired a PCB 393B12 accel which I guess is a smaller, more modern version of the large seismic accels I've seen before. It looks like a 'fat' version of a standard top-exit industrial accelerometer.

Specs are 10 V/g with a measurement range of 0.15 - 1000 Hz, 0.5 g pk.  I was concerned about handling/storage/transportation (can I keep it in the case, in my truck?).  I see it has a 5000 g Overload (shock) limit - does that mean it's virtually indestructible?

"The trend is your friend"

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Posts: 1,912
Reply with quote  #2 
I also used the old big ones on special cases and always treated them gently, at least a extra wrap of foam. I think PCB have a physical end stop that they introduced way back so they are more safe now but I would still treat them with a extra wrap of foam as a cracked crystal may be a pain just to be safe(r). 
Good Vibrations since early 1950's, first patented vibrometer 1956 in the US.

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Posts: 599
Reply with quote  #3 
My 10V/g sensors only have a 500g shock resistance. If they are dropped 2m onto concrete, it probably means curtains, but otherwise, I don't coddle them too much.
Walt Strong

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Posts: 889
Reply with quote  #4 
I have a PCB 393C accelerometer with microdot connector the side of the case. It came with a removeable flat disk mounting base. I put machine screws with pointed tip and nuts (3) to form a tripod base that is good for rough concrete surfaces. I have used it a few times for floor vibrations (vertical) in power plant control room, high rise buildings (construction sources), offices (over exercise room), and others. The primary issue that I had was with the very low time constant for the signal to settle after the ICP power is applied. My analyzer (2110 and 2120) would turn off before a measurement was ready. My work-around was to power the accelerometer with a PCB ICP battery power supply and connect analyzer to that.

I saw your truck, so I suggest putting accelerometer up high on a shelf to keep heavy tools and materials from falling on it! It should be fine in a rough-riding truck vibration environment.

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