- This topic has 2 replies, 3 voices, and was last updated 5 years, 3 months ago by Anonymous.
- February 27, 2017 at 8:09 am #15941AnonymousInactive
I am testing out your device and I was wondering what the highest possible sampling rate is? Theoretically, it should be 8000 Hz/32 samples or 250 Hz , correct? I have read that you are limited by the SD card. I am using a 90 MB/s SD card now. If I upgraded to to a card with 260 MB/s write speed could I achieve the max? I am recording voltage and current and I want to maintain the highest sampling rate continuously for as long as I record. (I realize eventually I would be limited by the size of the file) I keep being limited to just over 11 Hz with the settings at no wait, 8000 Hz, and 32 sample buffer. If you could summarize the limits in sampling (in a table maybe) it would be very helpful.
- August 3, 2018 at 12:11 am #19873AnonymousInactive
Sorry to bump an old thread but did you manage to get above 11Hz?
Any change when only logging one variable instead of two?
- August 3, 2018 at 5:34 am #19875AnonymousInactive
As far as i know, its not possible to shut down other channel while logging.
Everything is build around a little micro controller, which cant do faster logs than ~10Hz (with current firmware*). While writing to sd-card is one of the slowest processes, actual speed of memory card has very little to do with mooshimeters speed limitations. Actually you might get better results with small and slow card instead of something just found from a store with marketing wank for speed classes with “horse” as a font size.
* If firmware would be written from scratch again only for speed records in mind, it could probably go to some tens of values per second, so basically no real life improvements there.
Many people have confused mooshimeter with an oscilloscope, as we can generate graphs on the fly. In reality, we have multimeter (actually quite fast one), which has a way to show results in human readable form, where “normal” multimeters need to limit updates to ~2-5 Hz so that someone could actually see those values on a 7 segment display.