Which component should be inspected to ensure proper sampling in the system?

• A. Battery
• B. Display screen
• C. USB port
• D. Inlet filter

Answer: (D)

Ensuring the sample entering the system is clean and flows properly is essential for accurate measurements. The inlet path is where the sample first enters the measurement line, and the inlet filter sits right there to remove dust, particulates, and moisture before they can affect the analysis. If this filter is clogged or dirty, it can slow or alter the flow, introduce contaminants, or cause pressure changes that bias the sample and skew results. Regular inspection and replacement of the inlet filter keep the sample representative and protect the analyzer from damage. The other components—battery, display screen, and USB port—support operation and data access but don’t directly influence the quality of the sampled material.