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Thread: EC Meter Resolution

  1. #21

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    Quote Originally Posted by Jingo View Post
    I've approved links for Daveb22 to link to charts on his own website. There should be no advertising links or links to sites not his own.
    Before I do that, my Current Grow Journal has some informational (item descriptions) links to:
    • Amazon for parts purchased (eg: Viperspectra P100 lights)
    • YouTube review of the Viperspectra P100 lights
    • ILGM descriptions of the seeds I ordered and am growing


    Do those have to be removed?

    I assume, links back to THCtalk are OK

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  3. #22

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    Quote Originally Posted by DaveB22 View Post
    Before I do that, my Current Grow Journal has some informational (item descriptions) links to:
    • Amazon for parts purchased (eg: Viperspectra P100 lights)
    • YouTube review of the Viperspectra P100 lights
    • ILGM descriptions of the seeds I ordered and am growing


    Do those have to be removed?

    I assume, links back to THCtalk are OK
    Yes the off-site Amazon links need to be removed. You can put up screenshots if you want to. But you're just approved to put up those links to your own site.

    J

    "If science can't be questioned, It's not science anymore"

    ~Aaron Rogers

    "This is not an economic turndown, it is a takedown"

    ~ Catherin Austin Fitts

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  5. #23

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    I haven't looked at the YouTube video if it's an independent review. Like somebody that reviews many different types of lights that's fine. If it's just something that viper put out then no.

    J


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  7. #24

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    I will remove the Amazon and ILGM links

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  9. #25

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    Quote Originally Posted by DaveB22 View Post
    So I take it the jist of all that is:

    The Vivosun meter reads in mico-siemens (?S) and the PPM reading is on the Hanna (500) reference scale so,
    When in EC Mode, if that meter reads 968 ?S, you convert that 968 ?S value to milli-siemens (mS) by multiplying 968 ?S by 1000 to get 968 mS (which is normally referred to as an EC value of 0.968ec).
    You can then convert to ppm by multiplying the 968 mS (milli-siemens) value by .5 to get 484ppm.

    That is why the meter in EC mode would read 968 ?S/cm (which is also = 0.968 mS/cm) and 484ppm when in PPM Mode

    However, for those who like simple things, with that meter, if you drop all the ?S/mS reference confusion and simply remember:

    In EC mode:
    A displayed value of 1000 = 1.0ec. A displayed value of 500 = 0.5ec.
    You can simply take the displayed value (eg: 968) and multiply it by .5 to get the ppm value (eg: 968 * .5 = 484ppm)

    In PPM Mode:
    You can simply convert the PPM value (eg: 484) back to EC ?S/cm by dividing the displayed value by .5 (484/.5 = 968?S)
    You can simply convert the PPM value (eg: 484) back to EC mS/cm by dividing the displayed value by 500 (484/500 = 0.968mS)

    Dave
    Whilst I haven't checked your math... in a nutshell, that seems correct - I may sound like I split hairs but numbers are everything... and having the correct ones helps all involved
    It's Not What You Know, It's What You Can Prove

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  11. #26

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    Whilst I haven't checked your math... in a nutshell, that seems correct - I may sound like I split hairs but numbers are everything... and having the correct ones helps all involved
    Seems like that's why I started this Thread

    Dave

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  13. #27

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    Default Started my First Grow Journal

    I started my first Grow Journal at "RDWC Purple Haze & Grand Daddy Purple Grow"

    Links to the tables I built are also posted there

    Dave

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