PRODUCT SUPPORT MANUAL Y1-03-0146 Rev. D MS-2000 (M) Product No. 3990 Distress Marker Light ACR Electronics, Inc. 5757 Ravenswood Road Fort Lauderdale, Fl 33312 +1(954) 981-3333 · Fax +1 (954) 983-5087 www.acrelectronics.com Email: Info@acrelectronics.com A Chelton Group Company TABLE OF CONTENTS 1. 2. 3. 4. 5. 6. 7. 8. 9. GENERAL............................................................................................................................. 3 PURPOSE.............................................................................................................................. 3 GENERAL CHARACTERISTICS ..................................................................................... 3 OPERATING INSTRUCTIONS......................................................................................... 3 PERFORMANCE TESTING .............................................................................................. 4 TEST EQUIPMENT AND TOOLS .................................................................................... 6 THEORY OF OPERATION ............................................................................................... 6 MAINTENANCE REQUIREMENT .................................................................................. 6 PREVENTIVE MAINTENANCE CHECKS..................................................................... 6 10. ALIGNMENT ....................................................................................................................... 7 11. PERIODIC INSPECTION REQUIREMENTS................................................................. 7 12. REPLACEMENT PARTS LIST ......................................................................................... 7 13. PARTS REPLACEMENT PROCEDURE ......................................................................... 7 FIGURE 1 .......................................................................................................................................7 FIGURE 2 .......................................................................................................................................8 FIGURE 3 .......................................................................................................................................9 FIGURE 4 .....................................................................................................................................10 2 Y1-03-0146 Rev. D 1. General This publication provides maintenance and operating instructions for the MS-2000(M) Distress Marker Light. 2. Purpose The light is designed and intended to provide aircrew and other personnel with a highintensity visual distress marker signal for use in the event of unscheduled abandonment of aircraft in isolated regions and other emergency and/or special operational mission situations. 3. General Characteristics a. The MS-2000(M) Distress Marker Light is a lightweight, compact, battery operated, portable unit that is designed to be used as a multi-functional light during emergency and/or clandestine special mission situations. The light is designed to attract attention; to assist in location; and to facilitate personnel rescue operations in both overt and covert operations. The light system consists of a main body case containing the electronics, lamp, batteries and the flashguard (FG) shield containing one Infra Red (IR) and one blue filter. The flashguard also has raised battery polarity indicators to assist in non-visual battery replacement. The case is fabricated of high impact, cut resistant thermoplastic material and designed to insure watertight integrity of the main body case. The light utilizes a xenon strobe lamp, is powered by two AA batteries and is actuated by a magnetic reed switch. The light is designed for onehanded operation and may be operated by either hand or attached to any object. The flashguard shield contains both an IR and Blue filter which are used as safeguards in hostile territories so as to prevent possible signaling confusion (i.e., small arms ground fire) between the signaler and observer. The IR filter provides omni-directional transmission of IR wavelengths. The Blue filter is used for lineof-sight (directional) light transmissions. The IR filter is designed for use during clandestine operations. Electrical power for the MS-2000(M) is provided by two 1.5V, AA, alkaline batteries located in the base of the main body case. A retained battery door is provided with an "O" ring seal to insure its watertight integrity. Additionally, electrical power is controlled by a magnetic reed switch located on the side of the main body case. This switch also insures waterproof integrity of the main body case. b. c. d. 4. Operating Instructions a. Turn "ON". Slide switch up until it stops. The strobe should begin flashing within a few seconds. 3 Y1-03-0146 Rev. D b. c. Turn "OFF". Slide switch down until it stops. The unit will stop operating. White Light. With the flashguard shield in the retracted (stored) position, slightly raise the IR filter and rotate it either left/right 90°, push filter in to lock into place. (Figure 2) IR Light. With the flashguard shield in the retracted (stored) position, insure that the IR filter is resting on the top (vertical) end of the light over the clear lens, then push filter down to lock into place. (Figure 3) Blue Light. With the flashguard shield in the retracted (stored) position, slightly raise the IR filter and rotate it either left/right 90°. Then snap it in toward the side of the light to lock it into position. While 'Holding the main body case with either hand, grasp the flashguard shield with the other hand and pull it up until it stops or a slight locking sound is detected, then release. This is an indication that the Blue filter has been released and fully engaged to its proper operating position. (Figure 4) d. e. 5. Performance Testing a. Light Leakage Test With the IR filter in its operation position (Figure 3), turn the switch ON and observe that no light is transmitted through the sides of the case or the flashguard shield. Turn switch OFF. No light leakage is allowed in the IR mode. If necessary, replace the flashguard shield assembly and repeat the test. If a new flashguard shield fails to remedy the problem, the light is to be condemned and discarded in accordance with local procedures. b. Flash Rate Test. (1) Initial. A ten minute MANUAL flash rate test is a one-time requirement for all new MS-2000(M) lights received from supply stock. This test is required for initial acceptance of the light and is conducted to insure that the light is capable of sustained operations. Select the White Light function (Figure 2), turn the switch to ON and observe that the strobe lamp flashes. Allow the light to flash for nine (9) minutes, and then manually count the flash rate of the strobe during the final one minute of the test. This rate should be 50 ± 10 flashes. It is not necessary to directly observe the light flashes during this evaluation. This inspection should be performed in a dark room or enclosure. If any light fails to meet the 50 ± 10 flash rate requirements, check the batteries and, if necessary, replace both batteries and repeat the test. Additionally, the battery contacts in the battery well should be checked and, if necessary, cleaned with a small brush. Hold vertical while using brush so that any debris falls out of the light. Repeat the test again. If battery replacements or cleaning contacts fail to correct the problem, discard the light in accordance with local procedures. (2) Periodic. Normally this test is accomplished in conjunction with other life support survival kit / vest test requirements and/or as required by specific MAJCOM directives. This test may be accomplished MANUALLY or 4 Y1-03-0146 Rev. D AUTOMATICALLY by using the TS-23/A Strobe Light Tester. If the test is to be conducted MANUALLY, follow the test procedures as outlined in paragraph (1) above, except limit the test duration to two (2) minutes. Again, a flash rate of 50 ± 10 flashes per minute is the acceptable test rate. If using the TS23/A Strobe Light Tester for this inspection, the light can be tested in the TS-23/A with the IR filter in place, by placing the lens/filter over the inspection window on the TS-23 face label and then pressing the trap door down to turn the TS-23 "ON", or by removing the flashguard shield and inserting it into the tester. This is accomplished by separating the main body of the light from its flashguard shield. This separation is performed by holding the main body of the light with one hand while grasping the flashguard shield with the other and pulling in opposite directions. After separation, insert the top of the light into the trap door on the top of the TS-23/A, insuring that the xenon lamp is fully inserted into the tester. Turn the light switch ON and note the numerical reading recorded on the digital readout of the tester. An acceptable reading between 100-150 is required and equates to a flash rate of 50 ± 10 flashes per minute. If a reading of less than 100 is noted, replace both batteries and, if necessary, clean the battery contacts in the light, then repeat the test. Should any light continue to fail this test, discard the light in accordance with local procedures. Upon completion of this test, the light is to be reassembled by inserting the top of the light (lamp) into the bottom of the flashguard and pushing upward until it stops. Note: Standard ambient temperature for performing flash rate test is 70° Fahrenheit. Lower temperature may perhaps result in somewhat lower flash rates. c. BA-3058/U battery ("AA" Alkaline) or equivalent. Currently only a commercial test fixture exists to test the BA-3058 Radio Shack part number 910-2135 Type 22-096 or equivalent. Therefore, batteries surpassing their lifecycle/manufacturing duration's or batteries that are found to be defective will be discarded in accordance with local disposition instructions/guidelines. 5 Y1-03-0146 Rev. D 6. Test Equipment and Tools No special test equipment other than the TS-23/A Strobe Light Tester is required to test the MS-2000(M) strobe light. If this tester is not available or functionally inoperative, flash rate testing can be accomplished MANUALLY in accordance with procedures outlined in paragraph 5.b.(1) except limit the test to two (2) minutes, counting the rate in the last minute. Test equipment for the BA-3058/U battery is commercially available. 7. Theory of Operation All electrical circuitry comprising the MS-2000(M) strobe light is enclosed within its main body case assembly. Briefly, these circuits operate to step up the battery voltage to a level sufficient to fire the xenon flash tube. This stepped-up voltage is so timed that the flash tube will fire between 40-60 flashes per minute. 8. Maintenance Requirement Since all electronic circuitry of the MS-2000(M) strobe is enclosed within its main body case assembly and cannot be disassembled without destroying its integrity, preventive maintenance requirements are limited to initial and periodic flash rate testing and visual inspections. Battery preventive maintenance visual checks will be performed during initial and periodic inspections of the light. 9. Preventive Maintenance Checks DO NOT PERFORM PREVENTIVE MAINTENANCE IN FLAMMABLE ATMOSPHERE OR NEAR OPEN FLAME. a. MS-2000(M)/ Distress Marker Light (1) (2) (3) (4) (5) (6) b. Check that the xenon flash tube lens is not cracked or discolored. Check both the main body and flashguard shield cases for cracks or excessive abrasions. Check for full and free operations of both the IR and Blue light filters. Check that the IR and Blue filters are not cracked and discolored. Check that the light switch moves up and down freely. Check that the battery wells are free of dust and are clean. BA-3058/U Battery (or equivalent) 1.5V, AA, Alkaline. (1) (2) (3) Check the battery case for cracks, swelling or leakage. Replace as necessary. Do not mix different battery brands. Do not mix old and new batteries. Y1-03-0146 Rev. D 6 (4) Replace batteries if device is used on a mission or annually. 10. Alignment No alignment procedures or special inspection requirements must be performed on the MS-2000(M). 11. Periodic Inspection Requirements Normally the MS-2000(M) and associated batteries will be inspected concurrently with other equipment installed in aircraft/ejection seat survival kits, aircrew survival vest or other special requirements. Such inspection intervals will be as specified by respective MAJCOM/agency life support directives. Periodic inspections will include both flash rate and preventative maintenance checks. See paragraphs 5 and 9 for details. Record inspection dates per MAJCOM/agency procedures and directives. 12. Replacement Parts List a. b. c. Flashguard shield assembly A3-06-1920 Battery door assembly A3-06 ...