PH metre » History » Version 13
Frédéric Blanc, 2021-04-11 11:15
| 1 | 1 | Frédéric Blanc | h1. PH metre |
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| 3 | 2 | Frédéric Blanc | h2. PH-4502C |
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| 5 | 5 | Frédéric Blanc | !clipboard-202104101846-oevts.png! |
| 6 | 4 | Frédéric Blanc | |
| 7 | 3 | Frédéric Blanc | *Po* Ph analog |
| 8 | *To* Temp analog |
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| 9 | *Do* Trig digital |
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| 10 | |||
| 11 | 1 | Frédéric Blanc | !clipboard-202104101516-ovhks.png! |
| 12 | 2 | Frédéric Blanc | |
| 13 | 7 | Frédéric Blanc | h3. ADS1115 |
| 14 | 1 | Frédéric Blanc | |
| 15 | 7 | Frédéric Blanc | gain x1 (4.096V) |
| 16 | 11 | Frédéric Blanc | <pre><code> |
| 17 | 9 | Frédéric Blanc | ph=-5.7*(%value%/2^15*4.096)+21.34 |
| 18 | </code></pre> |
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| 20 | 6 | Frédéric Blanc | |
| 21 | 2 | Frédéric Blanc | https://www.e-tinkers.com/2019/11/measure-ph-with-a-low-cost-arduino-ph-sensor-board/ |
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| 23 | http://agregationchimie.free.fr/phmetre_arduino.php |
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| 24 | 10 | Frédéric Blanc | |
| 25 | 11 | Frédéric Blanc | h2. DS18B20 Température |
| 26 | 10 | Frédéric Blanc | |
| 27 | !clipboard-202104111008-blrnr.png! |
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| 28 | 12 | Frédéric Blanc | |
| 29 | correction en température du Ph |
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| 30 | |||
| 31 | !clipboard-202104111055-6t3ty.png! |
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| 32 | 13 | Frédéric Blanc | |
| 33 | h2. TDS Total Dissolved Solids |
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| 34 | |||
| 35 | le TDS mesure en ppm les solides dissous dans l’eau. |
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| 36 | |||
| 37 | !clipboard-202104111106-vnamd.png! |
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| 40 | compensationVolatge=Voltage/1.0+0.02*(temperature-25.0); //temperature compensation |
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| 41 | tdsValue=(133.42*compensationVolatge^3 - 255.86*compensationVolatge^2 + 857.39*compensationVolatge)*0.5 |
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| 42 | |||
| 43 | https://wiki.keyestudio.com/KS0429_keyestudio_TDS_Meter_V1.0 |