Which step verifies that the required concentration is achieved during acceptance testing?

• A. Verification of concentration attainment
• B. Visual inspection of detectors
• C. Verification of power supply
• D. Review of post-test documentation

Answer: (A)

Acceptance testing for a clean agent system centers on confirming that the protected space actually reaches the required agent concentration. This is verified by measuring the real concentration with calibrated instruments (gas analyzers or sampling devices) at representative locations and ensuring it attains the design concentration for the specified duration. That real-time concentration data demonstrates that the system will perform as intended in a fire scenario.

Visual inspection of detectors checks for proper installation and condition, but it does not quantify the agent level. Verifying the power supply ensures the system can operate, yet it does not show whether the concentration is achieved. Reviewing post-test documentation is about recording results and findings, not proving that the target concentration was reached.