TM 55-1930-209-14&P-19 Table 11-3.  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 that Batteries and electrical cable fittings are tight.  Use cables are not insulated tools to tighten as necessary. secure and 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 volt- meter 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 as Keyboard lamp and Alarm 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. 11-6 Change 1