03-22-2006 05:58 AM
03-22-2006 08:32 AM
03-22-2006 10:47 AM
03-23-2006 05:46 AM
03-23-2006 05:48 AM
03-23-2006 05:56 AM
hi, thanks for replying. yes im using an interface whcih i designed and built. it steps the voltage down to 5V and provides galvanic isolation, whilst passing all the harmonic frequncies. im also measuring the current too.
im pretty much looking for everything you suggested! im an electronics engineer you see: i appreciatte all your help.
thanks.
03-24-2006 09:47 AM
03-24-2006 10:04 AM
The nominal frequency of the supply voltage shall be 50 Hz. Under normal operating conditions
the mean value of the fundamental frequency measured over 10 s shall be within a range of
- for systems with synchronous connection to an interconnected system
50 Hz ± 1 % (i.e. 49,5 ... 50,5 Hz) during 99,5 % of a year,
50 Hz + 4 %/- 6 % (i.e. 47 ... 52 Hz) during 100 % of the time.
- for systems with no synchronous connection to an interconnected system (e.g. supply
systems on certain islands)
50 Hz ± 2 % (i.e. 49 ... 51 Hz) during 95 % of a week,
50 Hz ± 15 % (i.e. 42,5 ... 57,5 Hz) during 100 % of the time.
03-24-2006 10:58 AM
03-25-2006 05:25 AM
not really mate, i ony just added in that freq part so not
had much time to play with it yet. im not entirely sure which format i need it
in. i.e asci or text. both maybe! I’d like to have a copy of the actual
waveform, but i guess a text file of logged events would be great also. what format do i need it in if i want to do analysis on it once i collect all the data. i.e FFT etc.
im liking your thoughts mate. kinda what i had in mind, but i was just abit
unsure how to code it. Should i be using triggers in my acquisition? what
exactly are the point of them anyway? will it mean i can acquire waves at the
zero crossovers, for example, if i need 10 cycles from a 10Hz
signal., i could request 1000 S/s to read, at a freq of 1000 Hz. but this
may not necessarily give back 10 complete cycles! Suggestions?
thanks again.