OPTICAL RPM SENSOR GAIN ADJUSTMENT

CADU CREDIT CARD MEMORY (CCM) BATTERY REMOVAL AND INSTALLATION

AVIATION INTERMEDIATE MAINTENANCE (AVIM) REPAIR PARTS, SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT AVIATION VIBRATION ANALYZER

TM-1-6625-724-13P Aviation Vibration Analyzer Manual
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TM 1-6625-724-13&P 0032 00 0032 00-1(0032 00-2 blank) OPTICAL RPM SENSOR GAIN ADJUSTMENT Figures Figure 1. Optical RPM Sensor PN 29314700................................................................................................................... 1 Initial Setup: Personnel Required: Aircraft Technician Tools and Equipment: Tool Kit, Electricians Parts: Optical RPM Sensor PN 29314700, NSN 6625-01-327-5323 Equipment Condition: Sensor on workbench a. Remove clear cover. b. Adjust gain as indicated in figure 1. c. Reinstall clear cover OPTICAL TACHOMETER FAULT ISOLATION OPTICAL RPM SENSOR P/N 29314700 ERROR CODE 16414, TACHO OUT OF BOUNDS When photocell is connected to DAU and DAU has power, red LED should illuminate when reflective tape is placed in photocell’s path. LED should pulsate, the faster the pulse the stronger the signal. Gain + - Cable L.O. D.O. LED Set gain to maximum. Adjusting screw is turned clockwise until a click is heard or felt. If no click is detected then turn screw 15 turns. Potentiometer is clutched at end of travel, you will not damage by turning past maximum stop. D.O./L.O. Screw should be turned clockwise until it hits stop. This will align the screw with the D.O. Reflective tape must be clean. Make sure that you do not use your fingers to press tape into position. Use paper backing to press tape into place. Oils from your fingers can smudge tape and reduce reflectivity. Water (rain) or oil leaks can cause same problem. Minimum distance from photocell to tape should be no less than 4.5 inches. 3 4 1 2 Figure 1. Optical RPM Sensor PN 29314700 (NSN 6625-01-327-5323) END OF WORK PACKAGE

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