Hi, I don’t need measuring wave form, but just logging its frequency. So, 1 million of sample is ok for me because if I log frequency with a rate of 1 minute, it is equivalent to a period of about 2 years. Effectively, I’m looking to log continuously without stopping. But I want to obtain gradually ...

Hi,

I want to log frequency of a voltage sinusoidal signal during a very long-term test (range of several months) with a sampling rate of about 1 minute. The frequency is from 10 to 300 Hz.

Could you recommend me a suit device for this purpose?

Thank you by advance,