What is the purpose of testing air sampling-type systems?

• A. To verify system power supply
• B. To calibrate detectors
• C. To ensure the system operates as designed
• D. To test visual indicators

Answer: (C)

Testing air sampling-type systems is about confirming the entire sampling process works as it was designed to. This means verifying that air is drawn from the protected area at the specified flow rate, that the sample is transported through the tubing to the detectors without excessive loss or delay, and that the detectors respond correctly to the target contaminants within their sensing range. It also ensures that alarms, interlocks, and data logging operate as intended so warnings occur promptly when a threshold is exceeded. In addition, the test checks that pumps, valves, sample lines, and sensors are installed and functioning properly, so the system will perform reliably during an real event.

Power checks are important for overall system operation but don’t by themselves prove that the sampling network will function as designed. Calibrating detectors focuses on the accuracy of the detectors’ readings rather than the integrity of the sampling path and overall system performance. Visual indicators are useful for quick status checks but don’t guarantee correct sampling flow, transport, or detector response.