The New “Silent Accelerated Test” Method
Under the CAN/ULC-S536:2019 standard, technicians must test fire alarm batteries through a functional load test called the “Silent Accelerated Test.” The test is designed to simulate how the fire alarm system draws power during emergencies, rather than simply measuring surface voltage.
As such, the new method measures:
- Battery capacity retention: how well batteries maintain voltage after undergoing significant load.
- Recovery check: confirms the batteries are adequately recharged and maintained by the system’s battery charger
This technique provides a more thorough insight into the battery’s health and ensures that the battery performs properly in the event of an emergency – not just during the test.
FSS’s Proprietary Battery Testing System
To meet these new requirements efficiently and safely, we have developed an in-house testing kit purpose-built for the ULC-S536:2019 standard. Every FSS technician has been trained and certified in the new test protocol, ensuring accurate readings and full compliance across all sites – whether it’s a high-rise condominium, healthcare facility, or commercial property.
What Property Owners Should Expect
Because the new test method is more detailed and performance-based, battery testing will take longer than in previous years. Building owners and property managers should plan for slightly longer testing times and make sure that control panels and battery enclosures are easily accessible during the inspection visits.
While the testing will be more time-consuming, the benefits will be well worth it: more accurate test results, stronger compliance documentation, and increased safety for all building occupants.