TM 10-6665-297-13&P4-2WEEKLYINSPECTION(continued)c)Insert new lamp in socket and replace plastic cover (legend right-side-up) in panel.4-3MONTHLYMAINTENANCE4-3.1MONTHLYTESTANDADJUSTMENTS.Monthly (or as specified by operator's maintenanceschedule), perform the following tests and adjustments.1.Recalibrate alarm system in accordance with procedures in Section 3, CALIBRATION ANDADJUSTMENTS.NOTE:Alarm point settings are unaffected by recalibration.2.If proper calibration cannot be achieved, follow Troubleshooting Chart (Figure 4-1) procedures in thissection to find and correct existing problems.NOTE:Watch for unstable conditions such as erratic percent L. E. L. readings, meter pointer driftfrom zero significant change in voltage across detector power leads, etc. As indications oftrouble.If sensor element is replaced, or if problems appear, include the following steps:3.Using card extender 0023-4023 (if required) and 1-10 Volt range D. C. Voltmeter, read voltageacross control-module red and black test points marked B.4.If voltage reading across B test points does not match previously recorded reading (Paragraph 2-6.7, step 11), turn adjustment screw of VOLT potentiometer R2 to obtain the required voltage.5.Remove dirt, grease, and other foreign material from detector and detector housing.6.Remove any obstructions to normal flow of air around the detector that may have accumulatedbetween inspections.4-3.2FILTERSCREENSERVICING. Monthly (or as accumulations of dust and dirt require) remove andclean floor-standing cabinet filter screens as follows:1.Remove four screws that fasten each of two louvered front panels to cabinets. Remove front panelsand filter screens from cabinet.23-96177/1/764-3
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