Does anyone Have a conversion table From 700 ppm to 500 ppm scale?

I can’t seem to find a conversion table that converts the 700 ppm scale to the 500 ppm scale. Can anyone help? @dbrn32 @Myfriendis410 @MeEasy

500 is on the left (Hanna), 700 is on the right (truncheon)

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Thanks Man!

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