TDS Calibration & RO Design Framework

[NSK8700]

Having bought a TDS meter off-the-shelf from a store, I came across this notice:
http://www.reagecon.com/PerspectiveCMS/uploads/TDS_Tech_Tip.pdf
Now though I am going to use the TDS meter for water testing purposes(ground water hardness,hence potability,subsequently use the measurements towards design of custom Reverse Osmosis systems,presently for domestic markets only), How should I calibrate the TDS meter.I sometimes get to collect sediments of hardwater that deposits by themselves in overhead plastic tanks which are directly exposed to tropical heat (upto 35degree centigrade), in 6month intervals.
(1)I would like to know How do I CALIBRATE the TDS meter for it to provide accurate measurements in the aforesaid context.
(2) Whether there are any general DESIGN Guides to RO Systems (D-I-Y types) based on a conceptual+empirical framework from components available in market.Some resources reference will be appreciated.
(3) How to "RETREAT" the Output water of such RO assemblies so that it can be freely used to water plants of small domestic gardens or even a couple of trees, like Coconut trees,flowering plants,etc. What is the Soil characteristic threshold that is considered normal?

 

[Navin A S]

1) To properly calibrate your TDS meter, you need to know the specific calibration instructions for the particular model of TDS meter you have purchased. Reagecon provides some general guidelines for calibration in their technical tip that you linked to, but you should refer to the user manual as well for specific instructions. 2) There are a variety of resources available for DIY reverse osmosis systems. A good place to start would be the website of a company that specializes in this technology, such as Aquasana or Brondell. They usually provide detailed guides on how to build and maintain these systems. You may also want to check out websites like Instructables.com or eHow.com, which provide step-by-step instructions on how to build various types of reverse osmosis systems. Additionally, there are a variety of books available on the subject, such as The Complete Guide to Home Water Treatment by Robert M. Wilkins.3) To "retreat" the output water of an RO system for use in watering plants, you will need to adjust the pH level of the water to a neutral range (6.5-7.5). This can be done by adding a pH adjustment product to the water. Additionally, you may need to add specific nutrients to the water depending on the type of soil and plants you are trying to water. You can consult with a local gardening expert or your local nursery to determine what specific nutrients may be needed.

 

[oswaler]

I would like to provide the following response to the content regarding TDS calibration and RO design framework:

1. TDS Calibration: The first step in calibrating your TDS meter is to make sure it is properly calibrated using a standard solution. This can be done by following the instructions provided by the manufacturer or by using a calibration solution that is specifically designed for TDS meters. It is important to calibrate the meter regularly, especially if you are using it for water testing purposes, to ensure accurate measurements.

In the context of your specific situation, where you will be testing ground water hardness and using the measurements for designing custom RO systems, it is important to calibrate the TDS meter before each use. This will ensure that the measurements are accurate and can be used for designing the RO system.

2. RO Design Framework: When designing a custom RO system, it is important to consider the water source, the desired output quality, and the components available in the market. There are several resources available online that provide general design guides for DIY RO systems based on a conceptual and empirical framework. Some of these resources include articles, videos, and forums where experts and experienced individuals share their knowledge and experiences.

It is important to carefully research and select the components for your RO system based on your specific needs and budget. Some factors to consider include the type and quality of membranes, pumps, and filters. Additionally, it is important to regularly maintain and replace these components to ensure the efficiency and effectiveness of the RO system.

3. Treatment of RO Output Water: The output water of RO systems can be used for watering plants, however, it is important to consider the soil characteristics and threshold for normal soil quality. The output water of RO systems is usually low in minerals and nutrients, which can affect the growth of plants if used in large quantities. Therefore, it is recommended to mix the RO water with regular tap water to maintain a balance of minerals and nutrients in the soil.

It is also important to regularly monitor the soil quality and adjust the amount of RO water used accordingly. Additionally, using organic fertilizers can help improve the soil quality and support plant growth. It is also advisable to consult with a local agricultural expert or university extension office for specific recommendations for your area.