Topic | Need 2000 samples per second data points if possible

Home Forums Mooshimeter Support Need 2000 samples per second data points if possible

This topic contains 3 replies, has 2 voices, and was last updated by  ville 2 months, 2 weeks ago.

  • Author
    Posts
  • #18992 Reply

    Michael Bull

    Hi,

    I am investigating output current curves of transcranial direct current stimulators. Ideally I would like to sample at 2000Hz – but with the buffer it does not seem like this will be possible.

    Having said that the effective sampling rate does not seem to be close to what it should be. With the settings at 8000Hz and 32smpl I would assume there should be 250 data points per second, rather there seem to be only about 11 per second.

    It does not seem to sample at anything like the rate suggested by the settings – would you be able to help me with this.

    Kind regards

    Michael

  • #18996 Reply

    ville
    Participant
  • #19027 Reply

    Michael Bull

    All makes a lot more sense.
    It would appear, then, that the Mooshimeter is not capable of picking up the small spikes as they will be lost in the averaging.

    Do you think there is a way to get around the averaging ? Modification to Mooshimeter ?

    Would another multipmeter be better ?

    Or, is the only alternative an oscilloscope – unfortunately to measure votage and curent at the same time will be expensive – current probe ?

    Kind regards

    Michael

  • #19030 Reply

    ville
    Participant

    From what I have read, firmware is basically “ready”. There is no space left for new stuff and as long that it mostly works, we wont be seeing much development.. Smaller sample buffers might be possible (by James, because fw is closed source), but i’m not sure that is it also something that could be affected from the app (which is open), like James told about logging intervals..

    Oscilloscope would be nice (but expensive) and current shunt would not cost anything.. Piece of (probably existing) wire should be enough in most cases.. It seems to be bit bad thing for mooshimeter, that people see graphs about electrical measurements and think that those only come from scopes. Mooshimeter should be taken as 2 channel multimeter, that can log. It can do it bit faster compared to human with couple multimeters, pen and paper, but it would not make it an oscilloscope.. Buffer mode in graph view might raise the hope even more, but really it still limits your measurements to few hundred hertz with shooting in the dark as a trigger mechanism. It is much more though than most multimeters do in the same price range.

Reply To: Need 2000 samples per second data points if possible
Your information: