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Dew point calculation

Created by: Nyeke-Nyoka at: 2/14/2022 8:45 PM (5 Replies)

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2/14/2022 8:45 PM	Rate (0)
Nyeke-Nyoka Regular Member Joined: 6/21/2019 Last visit: 9/12/2023 Posts: 8 Rating: (0)	Szia! Segítséged szeretném kérni! Harmatpont számoló programra volna szükségem és ezt az értéket szeretném ki tenni egy HMI-re! A hőmérséklet és a relatív páratartalom értékek meg vannak a bemeneteken! Az a tervem ,hogy lekapcsolja kimenetet és hogy be tudjam állítani a megfelelő víz hőmérsékletet! Nem szeretném ,hogy ki csapódjon a pára a falon és a mennyezeten! Ebben kérném a segítséged! Válaszod előre is köszönöm! Nyeke-Nyoka Hi! I want to ask for your help! I would need a dew point calculator program and I want to put that value on an HMI! The temperature and humidity values are on the inputs! My plan is to turn off the output and be able to set the right water temperature! I don’t want the steam to condense on the wall and ceiling! I would ask for your help in this! Thanks! Nyeke-Nyoka
	Last edited by: Nyeke-Nyoka at: 02/14/2022 20:47:05 Last edited by: Jen_Moderator at: 02/15/2022 10:47:23 Edited text for better reading.
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2/14/2022 8:49 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/14/2025 Posts: 35960 Rating: (4502)	Have you a formula?

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2/14/2022 10:09 PM	Rate (0)
Nyeke-Nyoka Regular Member Joined: 6/21/2019 Last visit: 9/12/2023 Posts: 8 Rating: (0)	Sajnos nincs! Keresgéltem az interneten de semmi használhatót nem találtam! Találtam valamit estleg tudod használni! Unfortunately, there is no! I searched the internet but couldn't find anything useful! I found this might help you! Thanks! https://www.azosensors.com/article.aspx?ArticleID=23
	Last edited by: Jen_Moderator at: 02/15/2022 10:48:13 Edited text for better reading.
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2/15/2022 2:44 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 9/14/2025 Posts: 35960 Rating: (4502)	Sorry, but this formula can you not calculate with the LOGO! The LOGO! calculates only with Integer values (-32,768 to 32,767). In this case is it better you use a S7 CPU.

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2/15/2022 3:10 PM	Rate (0)
Scorp Platinum Member Joined: 2/22/2008 Last visit: 4/25/2025 Posts: 2698 Rating: (210)	Bethel in the german forum has a calculation for absolute humidy and dew point, but it's not easy to understand. See this Link to get more informations and use a translator. Regards, Scorp

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2/15/2022 8:34 PM	Rate (0)
Nyeke-Nyoka Regular Member Joined: 6/21/2019 Last visit: 9/12/2023 Posts: 8 Rating: (0)	Thanks! This is very good and quite accurate. Only 0.1-0.8 tenths of a degree cheats across the range! It fits within the margin of error. Thanks again!

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