For a technician performing water quality testing on a water purifier, the process typically involves several steps to ensure the system is working efficiently and the water is safe to consume. Below is a detailed breakdown of the work done:

1. Preparation and Safety Checks:

• Gather Equipment and Tools: Collect all necessary tools and testing kits, such as TDS (Total Dissolved Solids) meters, pH testers, chlorine test kits, turbidity meters, etc.
• Personal Protective Equipment (PPE): Ensure safety equipment like gloves, goggles, and lab coats are worn for protection.
• Inspect the Water Purifier System: Check the physical condition of the purifier, including filters, membranes, and seals to ensure there are no visible signs of damage or leaks.

2. Initial Assessment:

• System Power Check: Confirm that the purifier is functioning properly, including turning it on and observing if all components are running (e.g., UV light, water flow).
• Water Source Identification: Verify the source of water being used (e.g., tap water, borewell water) to consider the possible contaminants.

3. Testing Water Quality Before Purification:

• TDS (Total Dissolved Solids) Testing: Measure the TDS levels of the incoming water using a TDS meter. High TDS values indicate a need for filtration or reverse osmosis.
• pH Level Testing: Test the pH level to ensure that the water isn't too acidic or too alkaline.
• Chlorine Test: Measure residual chlorine levels, which can indicate whether the water has been treated with chlorine at the source.
• Turbidity Test: Check for clarity of water using a turbidity meter to detect suspended particles.
• Microbial Testing (Optional): In some cases, a technician may perform a microbial test to check for bacteria or other pathogens in the untreated water.

4. Test the Water After Purification:

• TDS Test: Measure the post-purified water’s TDS level to ensure it has been adequately reduced to a safe range.
• pH Level Check: Confirm that the pH level is within the acceptable range for drinking water (usually between 6.5 and 8.5).
• Chlorine Test: Ensure that chlorine, if initially present in the raw water, has been effectively removed.
• Turbidity Test: Verify that the water is clear and free from visible particles after purification.
• UV and Filtration Effectiveness: For UV purifiers, check the UV lamp and its effectiveness in deactivating bacteria and viruses.
• Taste and Odor Test: A technician may also assess the taste and odor of the water to ensure the purifier has removed any unpleasant smells or flavors.

5. Maintenance Checks and System Cleanliness:

• Filter and Membrane Inspection: Examine and clean or replace filters, membranes, or any other components that may have accumulated dirt, debris, or contaminants.
• UV Lamp Inspection: Check the condition of the UV lamp (if applicable) to ensure it's functioning optimally. Replace the UV bulb if necessary.
• O-Rings and Seals: Inspect seals and O-rings for wear or leaks, replacing them as needed to maintain the integrity of the system.

6. Documentation and Reporting:

• Record Test Results: Document all water quality test results, including TDS, pH, chlorine, turbidity, and any other parameters measured.
• Prepare Service Report: Create a detailed report that includes information about the water quality before and after purification, any maintenance performed, and recommendations for future service.
• Customer Communication: Inform the customer about the results of the water quality tests, explain any necessary actions (such as filter replacements), and advise them on how to maintain the system.

7. Final Testing:

• Recheck After Maintenance: Once any necessary repairs, replacements, or cleaning are done, recheck the water quality to ensure everything is functioning as expected.
• Test Water Flow and Pressure: Ensure there are no issues with water flow or pressure through the system after maintenance.

8. Customer Education:

• Provide Usage Tips: Educate the customer on proper maintenance intervals, like when to change filters or check water quality.
• Explain Water Quality Issues: If any water quality issues were found (e.g., high TDS, incorrect pH), offer recommendations on how to address them, including possible additional treatments like RO or UV systems.

9. Clean Up and Disposal:

• Dispose of Old Filters Properly: Dispose of old or used filters and other parts in an environmentally responsible manner.
• Clean Testing Equipment: Clean and sanitize any testing equipment used to avoid cross-contamination between test samples.

By following these steps, the technician ensures that the water purifier is operating effectively, providing clean and safe drinking water for the user.