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If the conversion factor on your ppm meter is e.g. 1 EC = 700 ppm then take the EC listed on the feed chart and multiply it by 700. e.g. 1 EC = 1 x 700 = 700 ppm; 1.5 EC = 1.5 x 700 = 1050 ppm; 2 EC = 2 x 700 = 1400 ppm etc.

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One possibility is the usage of an ion specific conductivity coefficient. This coefficient is listed in charts though for their usage it is necessary to have an exact water analysis because every single ion affects the conductivity. ppm700 scale: 2.4EC x 700 = 1680ppm [700 scale] (or 1680ppm / 700 = 2.4EC) If you are reading from a book that says you should grow your crop at 1100ppm - how do you know which scale the writer is referring to? It is very important to match the scale on your meter to the scale being referred to in the book. Is the scale on your ppm meter right for the job? The formula for conversion is 700 x EC in milliSiemens. Others use a straightforward Sodium Chloride conversion factor, which is considered by some to be closer to the EC of a hydroponic mix.

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Reset tab will reset all the values and we can carry out further calculation. Swap will redirect you to Percent to PPM calculator. Convert ppm to percent. 1% = 1/100 1ppm = 1/1000000 So 1ppm = 0.0001% So to convert from ppm to percent, divide the ppm by 10000: x(%) = x(ppm) / 10000 This represents the units measured - CF or EC. What's the difference? The ppm 700 scale is based on measuring the KCl or potassium chloride content of a solution.

Place the probe in the solution and read TDS in ppm. Change to EC on the meter and read EC in ms/cm. Conversion factor = ppm / ec. Comparing EC, CF & PPM. Electro Conductivity or Conductivity Factor (EC x10) is the ONLY Accurate measurement if relaying Nutrient strength to another Person as different PPM meters have been made with different scales for some reason? Ie EC X500 ECx560 or the most Common in Hydro ECx700 Bluelab meters will measure the EC of the solution, and then convert this to a ppm reading if the desired ppm scale is selected on the Bluelab device. The conversion from EC to ppm is as follows: ppm500 = EC x 500; ppm700 = EC x 700; Some examples of how this works, using a conductivity reading of 2.4EC: ppm500 scale: 2.4EC x 500 = 1200ppm [500 scale] The true ppm of a solution can only be determined by a chemical analysis. ppm cannot be accurately measured by a CF or EC meter.
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Australian 1 ms/cm (EC 1.0 or CF 10) = 700 ppm, Hanna, Milwaukee 1 ms/cm (EC 1.0 or CF 10) = 500 If the EC reading of 0.7 is 700 or 1000 µS, then the 0.5 reading will be 500 ppm. You can get to this number by multiplying 1000 by the conversion factor of 0.5.

The 700 scale is based on measuring the potassium chloride KCl concentration in a solution: 1.0 mS/cm x 700 makes 700 ppm 0.7 (700 CF) conversion factor is for an EC reading of 1000 μS/cm = 700 ppm Automatic Temperature Compensation All readings are compensated for variations in temperature Meaning every 1000 micro Siemens= 500ppm so 0.5 convention scale Your ec meter shows micro siemens and not mili Siemens. The convention from micro to mili its 1000, so your 700 micro it’s 0.7 mili.
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Change to ec on the meter and read ec in ms/cm. Conversion factor = ppm / ec. The EC range of the HI98131 is from 0.01 to 6.00 mS/cm and TDS is from 0 to 3000 ppm using a 0.5 conversion factor.

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The HI98131 also offers the option to use a 0.7 (700 ppm) EC to TDS conversion factor. An exposed temperature sensor allows for rapid temperature compensated measurements of EC and TDS. PPMcannot be accurately measured by a CF or EC meter. A conversion example is as follows; 2.4EC x 500 = 1200ppm (500 scale) or 1200ppm / 500 = 2.4EC. 2.4EC x 700 = 1680ppm (700 scale) or 1680ppm / 700 = 2.4EC. If you must grow using ppm (instead of EC), you will need to know the following; Below is a widely used EC to PPM conversion chart: America 1 ms/cm (EC 1.0 or CF 10) = 500 PPM European 1 ms/cm (EC 1.0 or CF 10) = 640 PPM Australian 1 ms/cm (EC 1.0 of CF 10) = 700 PPM Comparing EC, CF & PPM. Electro Conductivity or Conductivity Factor (EC x10) is the ONLY Accurate measurement if relaying Nutrient strength to another Person as different PPM meters have been made with different scales for some reason? Ie EC X500 ECx560 or the most Common in Hydro ECx700 An electronic PPM/TDS meter actually measures EC not PPM. 1 millisiemen (mS) = 1000 microsiemen (µS) The PPM figure is a result of a conversion factor (multiplier).

Sverige 100 ppm. KTV (OEL STEL). 700 mg/m³. KTV (OEL STEL) [ppm]. 150 ppm. 500 ppm.