TM 10-6665-297-13&P
4-2
WEEKLY INSPECTION (continued)
c)
Insert new lamp in socket and replace plastic cover (legend right-side-up) in panel.
4-3
MONTHLY MAINTENANCE
4-3.1
MONTHLY TEST AND ADJUSTMENTS. Monthly (or as specified by operator's maintenance
schedule), perform the following tests and adjustments.
1.
Recalibrate alarm system in accordance with procedures in Section 3, CALIBRATION AND
ADJUSTMENTS.
NOTE: Alarm point settings are unaffected by recalibration.
2.
If proper calibration cannot be achieved, follow Troubleshooting Chart (Figure 4-1) procedures in this
section to find and correct existing problems.
NOTE: Watch for unstable conditions such as erratic percent L. E. L. readings, meter pointer drift
from zero significant change in voltage across detector power leads, etc. As indications of
trouble.
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 voltage
across 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 accumulated
between inspections.
4-3.2
FILTER SCREEN SERVICING. Monthly (or as accumulations of dust and dirt require) remove and
clean floor-standing cabinet filter screens as follows:
1.
Remove four screws that fasten each of two louvered front panels to cabinets. Remove front panels
and filter screens from cabinet.
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4-3
