The final CF of your nutrients should be in the range of 1.5 – 1.8, after PH balancing and all additives have been put into the tank.
Which standard is this? micro Siemens/cm or NaCl standard (ppm)
Full Version: Ec Standard?
I don't know the answer to your question, but the "cf 1.5-1.8" bit is wrong. You probably got that off of the Nutrients FAQ because i followed those guidlines and ended up underfeeding my plants for a couple weeks. Sombody messed up and should fix that.
It's 1.5-1.8 EC
OR
15-18 CF
i'm sure you can google ec vs cf or find it on this site.
It's 1.5-1.8 EC
OR
15-18 CF
i'm sure you can google ec vs cf or find it on this site.
QUOTE(frankydoodles @ Sep 26 2006, 08:25 PM) [snapback]697217[/snapback]
You probably got that off of the Nutrients FAQ because i followed those guidlines and ended up underfeeding my plants for a couple weeks. Sombody messed up and should fix that.
It's 1.5-1.8 EC
OR
15-18 CF
Well spotted!
This is the maths to convert between them
EC (eg 0.6, 1.4) to CF: EC * 10 = CF
EC to TDS: EC * 700 = TDS
EC to PPM: EC * 500 = PPM
(not sure if the TDS and PPM is the wrong way around or not)
EC (eg 0.6, 1.4) to CF: EC * 10 = CF
EC to TDS: EC * 700 = TDS
EC to PPM: EC * 500 = PPM
(not sure if the TDS and PPM is the wrong way around or not)
ec=electrical condutivity (which i needed reminded of recently) and is measured in micro seconds taken to pass an alternating currant through a sample. heavy doooooood.
cf=conductive flow. hang about...thats the same shiz innit? just a better scale. no micro seconds, no decimal place, just nice whole numbers.
the other two, along with this x500 x700 puzzles me. tds is total disolved solids, and is measured in ppm, parts per million. however, our meters are incapable of such lab standard measurements. they just measure the conductivity of the sample, and thats that. you can guess the tds from this, but not all solids affect the conductivity of the sample. we cant actually measure tds or ppm.
that leaves only ec an cf as available measurements, and both are the same, just scaled differently. if you wish to be a proffesor then talk ec. if you want to make life easy, talk cf. using different scales just causes confusion, but unfortunatly the cheapo tack meters tend to talk ec, meaning users wish to talk ec. i say dont buy tack, they dont last, and you have to spend on fluids, and just try stiring the tank with one
. the stick things now carry a 5 year guarantee. dont mess about! 
cf=conductive flow. hang about...thats the same shiz innit? just a better scale. no micro seconds, no decimal place, just nice whole numbers.
the other two, along with this x500 x700 puzzles me. tds is total disolved solids, and is measured in ppm, parts per million. however, our meters are incapable of such lab standard measurements. they just measure the conductivity of the sample, and thats that. you can guess the tds from this, but not all solids affect the conductivity of the sample. we cant actually measure tds or ppm.
that leaves only ec an cf as available measurements, and both are the same, just scaled differently. if you wish to be a proffesor then talk ec. if you want to make life easy, talk cf. using different scales just causes confusion, but unfortunatly the cheapo tack meters tend to talk ec, meaning users wish to talk ec. i say dont buy tack, they dont last, and you have to spend on fluids, and just try stiring the tank with one
. the stick things now carry a 5 year guarantee. dont mess about!
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