EST 3 | How to do Backup Battery Ohmic Test | NFPA 72 2025 Edition

This video will show how to do the Backup Battery Ohmic Test for an EST 3 fire alarm panel NFPA 72 - 2025 Edition Table 14.4.3.2, Component 9(4): Ohmic Test Test Frequency - Upon Installation of New Batteries When the battery is installed, establish a baseline ohmic value for each battery cell/unit or, where available, use baseline ohmic values provided by the battery or test equipment manufacturer. In either case, record the base line ohmic value on each battery cell/unit. Test Frequency - Semiannually With the battery fully charged, measure the internal ohmic value of each battery cell/unit. Record the test date and ohmic value on each cell/unit. Replace the battery when the ohmic measurement of any cell/unit deviates from the established baseline by 30 percent or more for conductance, or 40 percent or more for resistance or impedance. Where the battery or test equipment manufacturer's baseline ohmic values are used, replace the battery when any cell/unit has an internal ohmic value outside of the acceptable range. A load test performed in accordance with item 9(5) is an acceptable alternative for an ohmic test. Battery Tester: https://www.bkprecision.com/products/...