What is necessary for the maintenance of an automatic sampler?

• A. Periodic cleaning
• B. Constant maintenance for accuracy
• C. Replacement of parts only when broken
• D. Calibration once a month only

Answer: (B)

The maintenance of an automatic sampler is vital to ensure its accuracy and reliability in collecting wastewater samples. Consistent maintenance is necessary for accuracy because automatic samplers can be affected by a variety of factors such as build-up of debris, chemical residue, and mechanical wear over time. Regular checks and adjustments help to ensure that the sampler functions correctly and provides representative samples, which are crucial for effective monitoring of wastewater quality.

While periodic cleaning is important for keeping the sampler operational, and parts may indeed need to be replaced when broken, these actions alone do not encompass the full scope of what is necessary for maintaining accuracy. Calibration, which ensures that the sampler is measuring correctly, must also be performed regularly as part of a comprehensive maintenance strategy. Therefore, ongoing maintenance that includes calibration and functional checks is essential to achieve and maintain the accuracy needed for effective wastewater sampling.