How do I perform a walk test on the NFS-320, and how does the automatic detector sensitivity testing work?

The NFS-320 performs automatic detector sensitivity tests every 256 minutes, while the Walk Test uses detector LEDs to provide diagnostic feedback. During a Walk Test, the bicolor or multicolor LEDs on FlashScan detectors blink to indicate the specific device address [1].

While the system can generate Walk Test reports, the specific keypad steps to initiate the test were not found in the provided manuals [1].

Automatic Sensitivity Testing

1. Frequency: The control panel automatically tests every installed detector every 256 minutes (Page 58) [1].

2. Failure Reporting: If a detector fails to meet the required test limits, the panel generates an Auto Test Fail type code (Page 58) [1].

3. Drift Compensation: The system uses software algorithms to compensate for dust accumulation, allowing it to perform the periodic sensitivity measurements required by NFPA 72 automatically [1].

4. Maintenance Warnings: If drift compensation reaches its limit, the panel issues three warning levels:** Low Chamber value, Maintenance Alert, and Maintenance Urgent (Page 3) [1].

Note: Manual sections vary between citing two or three maintenance alert levels [1].