Capture Peak Strain Gage Fluctuation For Shotgun Chamber Pressure Measurement

[joeqsmith]

Say you have a peak chamber pressure of 60k psi.

Not for a shotgun. 

Shotgun pressures are in the 10,000 PSI range. The SAAMI MAP (maximum average pressure) for a 12 gauge is 11,500 PSI.

I went through the basic math to show you how to determine the pressure resolution.  "Say you have"  or in other words, an example.

[Silver_Is_Money]

What is the best Oscilloscope means for triggering the capture and image recording of a brief rise in an otherwise stable (aside from the expected background noise) DC voltage?  My initial guess is to position the trigger pointer above the signal noise and set it to trigger on rise.

[David Hess]

What is the best Oscilloscope means for triggering the capture and image recording of a brief rise in an otherwise stable (aside from the expected background noise) DC voltage?  My initial guess is to position the trigger pointer above the signal noise and set it to trigger on rise.

Modern DSOs may have special trigger modes which could be used, but level triggering will work fine and should return a result on the first try.

Estimating the peak strain will give an idea of how large the signal will be, so the vertical sensitivity can be set to get a reasonable display.

[csuhi17]

Yes, that limited memory will make your setup more difficult.  It can be done, but you'd have to have a surefire triggering system and I don't mean for the shotgun.  Long acquisition times give you the luxury of capturing your event and then zooming back to it.  FNIRSI is pretty crap from what I've heard elsewhere, you'd probably be better off looking at MicSig tablet scopes if you want battery operation and good portability.  I've no direct experience with either.

Thanks!  The MicSig tablet DSO's  look great!  The only problem I see is that the lowest priced model I see (in an admittedly quick search) costs about 5 times more than the Frnsi tablet.

Forget Fnirsi, it's a waste I say from experience, take a look at the Fnirsi topic open here, You can't believe what he draws, and he has little memory.
Not worth more than $50 in my opinion...
You can use a power bank for Rigol, which you can also use for other things. If memory and bandwidth are not enough for you, you can hack it,

[Silver_Is_Money]

Forget Fnirsi, it's a waste I say from experience, take a look at the Fnirsi topic open here, You can't believe what he draws, and he has little memory.
Not worth more than $50 in my opinion...
You can use a power bank for Rigol, which you can also use for other things. If memory and bandwidth are not enough for you, you can hack it,

Thanks!  The Fnirsi is forgotten.  I've had my eye on the Rigol DHO802, but finding a field usable power bank for it may be interesting.