NPC LSI Calc App Reviews
NPC LSI Calc App Description & Overview
What is npc lsi calc app? The NPC LSI Calc is the newest, most advanced and most accurate calculator for determining the Langelier Saturation Index (LSI) for swimming pool and spa water. It was developed by noted pool and spa water chemistry expert and author, Robert W. Lowry. It is the only LSI calculator that currently has exact adjustments for cyanuric acid and borate.
The LSI is used to predict if pool or spa water is corrosive, balanced or scaling. The NPC LSI Calc uses the original mathematical equations which use logarithms, square roots, and interpolated constants for calculations. We do not use inaccurate lookup tables and factors. The actual water test results are used for calculations.
The NPC LSI Calc is easy to use, you input the customer or pool name and then the water test results for pH, Total Alkalinity (TA), Cyanuric Acid (CYA) Borate (B) Calcium Hardness (CH), Total Dissolved Solids (TDS), and the water Temperature (T) in degrees Fahrenheit. The LSI with adjustments is automatically calculated and displayed. The background color of the LSI value changes from green to amber to red depending on whether the water is Corrosive, Acceptable, Ideal, or Scaling. This gives a visual or at a glance notice of the water’s condition.
The original LSI was never intended for predicting corrosive, balanced or scaling water conditions for pools or spas. In fact, it was developed in 1936 which was many years before the development of Cyanuric Acid (CYA) which became popular around 1960 and remains so. The very popular trichlor chlorine tablets actually contain 56 % CYA and so as chlorine is dispensed, the CYA builds up in the water. CYA has a direct influence on Total Alkalinity (TA) so an adjustment had to be made to the original LSI calculation.
Another family of chemicals that have become popular recently as a pH buffer and algaestat in swimming pool and spa water are borates. Borates also have an influence of TA. Using borates in pool or spa water keeps the pH from rising but also requires an adjustment to TA and therefore has an effect on the LSI calculation too.
We have determined the exact affect borate and CYA will have on LSI calculations and built in the mathematical adjustments to the NPC LSI Calc App.
The goal mathematically is to have an LSI of near 0.00 but any value from –0.30 to + 0.50 is either Acceptable or Ideal. Positive values show increasing tendencies for forming scale and values more than +0.50 indicate scaling water conditions that require action. Negative values show increasing tendencies for being corrosive or aggressive and values greater than –0.30 indicate corrosive water that requires action.
We do not recommend which water conditions to change or chemical amounts to adjust the water balance or LSI. Which condition to adjust is best accomplished by the service tech, pool owner or pool store. There may be reasons that one condition or another cannot be changed or perhaps a condition is easier to change than another. But you can input new amounts for any condition to see what affect it will have on LSI.
Results can be saved and reviewed. The number of records saved is only limited by your phone’s memory. It is easy to delete of records.
Protecting the pool or spa surface, plumbing and equipment and having balanced water for your customers, your family or guests are easy with the NPC LSI Calc.
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NPC LSI Calc 1.2 Tips, Tricks, Cheats and Rules
What do you think of the NPC LSI Calc app? Can you share your complaints, experiences, or thoughts about the application with National Plasters Council, Inc and other users?
NPC LSI Calc 1.2 Apps Screenshots & Images
NPC LSI Calc iphone, ipad, apple watch and apple tv screenshot images, pictures.
Language | English |
Price | $4.99 |
Adult Rating | 4+ years and older |
Current Version | 1.2 |
Play Store | npc.lsi-calc |
Compatibility | iOS 10.0 or later |
NPC LSI Calc (Versiyon 1.2) Install & Download
The application NPC LSI Calc was published in the category Business on 04 September 2017, Monday and was developed by National Plasters Council, Inc [Developer ID: 1273077383]. This program file size is 15.08 MB. This app has been rated by 6 users and has a rating of 3.3 out of 5. NPC LSI Calc - Business app posted on 03 September 2021, Friday current version is 1.2 and works well on iOS 10.0 and higher versions. Google Play ID: npc.lsi-calc. Languages supported by the app:
EN Download & Install Now!App Name | Score | Comments | Price |
Issue Fixes Added Carbonate Alkalinity calculations
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Find on this site the customer service details of NPC LSI Calc. Besides contact details, the page also offers a brief overview of the digital toy company.
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NPC LSI Calc Comments & Reviews 2024
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Doesn’t work on iPhone. Input boxes are stacked on top of each other. Can’t use
Great App. I own a pool service company in AZ and I use this app all the time to get my LSI readings at each pool. Even though it doesn’t give you suggested amounts of chems to use to adjust the numbers that’s ok for now, although I’d like to see that calculator on here someday. It’s dead in accurate every time.
Not for testing pools!. This app is not designed to calculate any sort of pool treatment ( not like google recommends), it only displays the end condition of your water chemistry based on the input values your give it. It wides not tell you chemicals to add to bring your pool back to a (clear water) state.
My bad.. App great
Not sure it’s accurate. Not sure it’s accurate with lower alkalinity and higher PH levels at 50 ppm borate. The LSI goes negative as the PH approaches 8.5 for my pool conditions of 80 ppm alkalinity, 290 CH, 50 ppm borate, 60 CYA, 86 Fahrenheit, 4500 tds. Seems maybe the borate correction on alkalinity allows alkalinity to go negative at higher PH levels? Is this correct?
Now good to go on iOS 12. With the latest update the app is working as advertised. Back in business, thanks! I will add that the arrow graphic at the top is pretty much unreadable with way too small fonts. But the rest of the app is good.
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