an ec to ppm - AN Forum Displaced Members - International Cannagraphic Magazine Forums

lilred121686 · 05-31-2008, 02:29 AM

to get the ppm for an ferts. i times trhe ec by 700 right???

humble1 · 05-31-2008, 03:04 PM

or 500
or 640

it depends on your conversion factor.

forget ppm. EC is what any meter is reading, then converting it to ppm.

peace, love & coco

05-31-2008, 05:34 PM

I messed around with the e.c. function on my pen and found that there was about a 200 ppm swing for the same e.c. There isn't a universally accepted conversion factor. I suggest you learn e.c. if that's what you're working with already.

Kenny Lingus · 06-03-2008, 09:59 AM

AN use a conversion rate that make 700ppm into EC 1,0 ms/cm

Growing/measuring EC is the easiest way. It will always be more accurate and you go on by observing the plants needs in relationship to the measured EC, adjusting 0,1-0,2 whenever needed. (Most plants I grow will start at 0,6 and they actually peak as low as EC 1,3-1,8, but tomatoes and veggie stuff often run from EC 3,0-5,0!!!)

Rosy Cheeks · 06-03-2008, 02:16 PM

Here's a convertion chart for you.

But, as the wise ones in this thread said, drop the ppm and learn EC, you'll be doing yourself a favor.
PPM testers actually measure in EC and convert to PPM, although the two scales (EC and PPM) are not directly related. Each nutrient (mineral) gives off a different discharge reading. To make it workable, an arbitrary standard was created which assumes that a specific EC means equates to a specific amount of nutrient solution. Consequently, the PPM reading is not precise at all, it is only an approximative estimation of the EC.

humble1 · 06-04-2008, 11:09 AM

And here I thought I was gonna have to defend myself
LOL

Peace, love & coco

05-31-2008, 02:29 AM	#1
lilred121686 Member Join Date: May 2007 Location: in the middle of hickville Posts: 97	advanced ec to ppm to get the ppm for an ferts. i times trhe ec by 700 right??? Last edited by lilred121686; 06-03-2008 at 07:36 PM..

06-03-2008, 09:59 AM	#4
Kenny Lingus trichomosieur Join Date: Aug 2004 Location: Northern Europe Posts: 841	AN use a conversion rate that make 700ppm into EC 1,0 ms/cm Growing/measuring EC is the easiest way. It will always be more accurate and you go on by observing the plants needs in relationship to the measured EC, adjusting 0,1-0,2 whenever needed. (Most plants I grow will start at 0,6 and they actually peak as low as EC 1,3-1,8, but tomatoes and veggie stuff often run from EC 3,0-5,0!!!) __________________ We Are Scientists We Do Genetics We Leave Religion To The Psychos And Fanatics Grinderman 2007

06-03-2008, 02:16 PM	#5
Rosy Cheeks dancin' cheek to cheek Join Date: Sep 2005 Location: Back, and to the left... back, and to the left... Posts: 2,560	Here's a convertion chart for you. But, as the wise ones in this thread said, drop the ppm and learn EC, you'll be doing yourself a favor. PPM testers actually measure in EC and convert to PPM, although the two scales (EC and PPM) are not directly related. Each nutrient (mineral) gives off a different discharge reading. To make it workable, an arbitrary standard was created which assumes that a specific EC means equates to a specific amount of nutrient solution. Consequently, the PPM reading is not precise at all, it is only an approximative estimation of the EC. __________________ . "The time has come" the walrus said, "To talk of many things: Of shoes-and ships-and sealing wax Of cabbages-and kings- And why the sea is boiling hot And whether pigs have wings." Lewis Carroll Rosy's Mugshots and stuff... looking for the Ogre Blueberry Buds and some Wild Thoughts Overgrow! -Anything said by Rosy Cheeks is made up by a person trying to make himself seem important on the internet. The pictures in the gallery are photoshopped fakes.

05-31-2008, 05:34 PM	#3
Guest Guest Posts: n/a	I messed around with the e.c. function on my pen and found that there was about a 200 ppm swing for the same e.c. There isn't a universally accepted conversion factor. I suggest you learn e.c. if that's what you're working with already.