ITEM INTERVAL ITEM TO BE PROCEDURES CHECK FOR AND HAVE REPAIRED OR ADJUSTED EQUIPMENT IS NOT READY NO. B    D    A D    W   M    Q   S A INSPECTED AS NECESSARY AVAILABLE IF TM 55-1930-209-14&P-17 Table C-1.  Preventive Maintenance Checks and Services ;or Workboat, Lifesaving, and Firefighting Systems (Continued) B - Before D - Daily Q - Quarterly D - During W - Weekly S - Semiannually A - After M - Monthly A - Annually 6) It is essential that the smoke flow be continuous  and not a series of iso- lated puffs as the detector will sense the clear spaces between the smoke as a return to normal, non-smoke con- dition. 7) If the smoke testing team has diffi- culty with their initial attempts, refer to smoke detector system sensitivity adjustment and smoke testing proce- dures contained in the manufacturer's manual. 8) As smoke is introduced into the mod- ule, the delta voltage should decline. 9) If the voltage appears to modulate (decline and increase), this indicates smoke is not being introduced contin- uously into the accumulator.  If no voltage decline is observed, it indi- cates: (a)    There are serious discontinuities in the pipework. (b)    There are blockages in the pipework. (c) The pipework does not run to the module being tested. 10)   The smoke test procedure is per- formed by two persons: (a)    One man operates the smoke tester and applies smoke to each accumulator installed in the ves- sel. (b)    The second man, stationed at the detector cabinet, observes the system alarming, resets it, and records the specific accumulator causing a specific detector mod- ule to alarm. C-22