TM 55-1930-209-14&P-11 Table C-1.  Preventive Maintenance Checks and Services for Equipment Monitoring System (Continued) B - Before D - Daily Q -  Quarterly D - During W - Weekly S -  Semiannually A - After M - Monthly A -  Annually INTERVAL ITEM PROCEDURES EQUIPMENT ITEM TO BE CHECK FOR AND HAVE IS NOT READY/ NO. INSPECTED REPAIRED OR ADJUSTED AVAILABLE IF B   D   A   D  W  M   Q   S   A AS NECESSARY a.    Check that batteries are secure and Batteries and that electrical cable fittings are tight. cables are not Use insulated tools to tighten as secure and necessary. fittings not tight. b.    Check   batteries   for   proper   electrolyte level.    Add  distilled  water  or  clean  tap water to bring to proper level c.    Make sure battery charger select switch is  on  FLOAT  for  normal  charges  and voltmeter reads about 24V.  The HIGH switch setting is for rapid recharge CAUTION Do not allow battery charger to remain on    HIGH    setting    for    more    than    24 hours. 3 Keyboard Lamp a.    Perform keyboard lamp and alarm test Keyboard lamp and Alarm as follows: inoperable 1)   Press EDIT key. 2)   Press    key    6    (KEYBOARD    LAMP TEST).    All  keyboard  keys,  except ACK   key,   should   light   and   alarm should  sound.    Make  sure  all  alarm devices operate. b.    Using insulated tools, replace bad lamps   Monitor does not and fuses. return to normal operation c.    After completion of test, press EDIT key to initiate normal monitoring. NOTE Keyboard lamp and alarm test may be run without affecting monitoring anytime edit mode Is not in use. C-4