mcmurdo S4 Rescue SART Service Manual Download Page 22 | Manualshive

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5.3.

Re-tune PCB

Although it is possible to perform alignment of the PCB in the field, this is not a recommended
procedure because it requires specialised test equipment and suitably qualified technicians.

It is strongly recommended that PCBs are returned to McMurdo for calibration.

5.4.

Factory return procedure

If a SART cannot be repaired in the field, it should be returned to the factory.

The SART assessment form must be completed and returned with the SART to show the tests
which have been performed and the results obtained.

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Summary of Contents for S4 Rescue SART

Page 1: ...S4 RESCUE SART Service Service Service Service Manual mcmurdo mcmurdo mcmurdo mcmurdo ...

Page 2: ......

Page 3: ...3 4 Fault finding 17 5 Repair procedures 18 5 1 Replace O ring 18 5 2 Replace PCB 18 5 3 Re tune PCB 19 5 4 Factory return procedure 19 6 Spares 20 Appendix 1 Specification 21 7 Product Warranty 22 8 End of Life Statement 23 8 1 Battery Removal 23 8 2 Disposal 23 This document is McMurdo copyright and contains proprietary owned intellectual property rights and confidential data All rights are stri...

Page 4: ...on Off all functions are disabled This is the storage condition Sleep the receiver is active and ready to respond to a detected signal Standby the receiver and transmitter are active and ready to respond to a detected signal Transmit a signal has been detected and the unit is responding Upon switch on most units will immediately be in Standby mode after approx 15 18 seconds of seeing no incoming r...

Page 5: ...spectrum analyser accurate to 1 MHz with Rx antenna or b ARG 5420 dedicated SART tester Equipment for routine servicing Marine X band Radar within 3 miles or access to this Leak test facility made on site as required Static safe work area with operator wrist strap Battery discharge circuit made on site as required Tin can or metallic cover for screening SART radome Multimeter Handtools Small Pozid...

Page 6: ...tes a biological hazard These batteries are HAZARDOUS if short circuited punctured incinerated or deformed Lithium batteries must not be short circuited Lithium batteries must be handled transported and disposed of using appropriate safety precautions The use of rubber gloves as a routine precaution is recommended In the event of leakage of the battery electrolyte which can be recognised by a pung...

Page 7: ...cal agents are handled in accordance with the manufacturer s instructions and that suitable protective clothing is worn Make sure that the working area is well ventilated and that chemical substances are not left exposed Observe good hygiene practices do not eat drink or smoke when handling chemicals Cyanoacrylate adhesives bond instantly on contact If skin is bonded it can usually be released by ...

Page 8: ...should be inspected for mechanical damage It is strongly recommended that the SART be functionally tested every year using a radar signal The SART should not be opened during this test An approved service label showing the date of test should be affixed to the outside of the SART Every time the batteries are replaced the SART must receive a functional test and a leak test as shown in the table bel...

Page 9: ...rt customer billing and must accompany any warranty return to the manufacturer It is important that as much information as possible is recorded on the form Procedures for the assessment are detailed in section 3 ASSESSMENT Inspect Self test Receipt Functional test Return No fault Leak test Disassemble Change battery Reassemble Disassemble Repair Reassemble Battery change Fault found Leak test ...

Page 10: ... triggered sleep state PASS FAIL Triggered active state PASS FAIL Functional test PASS FAIL Frequency test results Upper frequency 9 53 0 03 MHz PASS FAIL Value MHz Lower frequency 9 17 0 03 MHz PASS FAIL Value MHz Number of sweeps 12 1 PASS FAIL Value sweeps Pulse length 95 13 us PASS FAIL Value us Battery voltage PASS FAIL Value volts Leak test if opened PASS FAIL Date Name of tester Signature C...

Page 11: ...ated If this is the case fit a new battery Battery expiry Note the expiry date If there is less than 6 months left contact vessel and advise that they will need a new battery 3 2 Self test procedure CAUTION Only test for the minimum time possible A live distress call may be received by other vessels within range Equipment Testing requires a signal to trigger the SART out of sleep and into active s...

Page 12: ...of sight to the radar antenna 4 The SART should indicate active mode 5 Confirm the radar screen shows typical SART echoes 6 De activate the SART as quickly as possible Observations The SART response is a series of 12 pulses which is displayed on a radar as a number of echoes spaced approximately 0 6 nautical miles apart Ideally these will be clear dots extending radially outwards However close pro...

Page 13: ...sers who are familiar with the instrument 1 Switch on 5420 and check display 2 Press F4 press F1 twice 3 Activate SART in Self test mode 4 Hold 5420 horizontal about 300 mm 12 from top of SART 5 Press and hold F1 on 5420 until a consistent spectrum is displayed 6 De activate SART 7 Press F3 twice on 5420 to display PASS FAIL listing 8 Press F3 again then F2 to save the result 9 Press F4 then enter...

Page 14: ...atest possible strength of signal but not to saturate the 5420 receiver Spectrum analyser display 2 Once the test is complete pressing F3 on the tester displays the frequency response of the SART against time and so shows a series of frequency sweeps A magnified view press F1 is shown note that the SART being displayed sweeps down from 9 5 GHz to 9 2 GHz Note the exact limits of the frequency swee...

Page 15: ...e the SART from the water and dry it thoroughly before its temperature drops Provided that the water is clean and fresh no damage should be sustained from a leak Leaking SARTs may be disassembled and dried in an oven maximum 55 ºC then re assembled and re tested Any escape of bubbles must be considered a failure If the unit fails then disassemble the SART If there is any evidence that water has en...

Page 16: ...oltages to measure The open circuit voltages must be 10 8 V or greater and 5 4 V or greater otherwise the battery must be replaced Voltages should not be measured within 5 minutes following activation or self test The kit contains the following parts Battery pack assembly 86 430 O ring 86 425 Screw M4 x 30 SS PH Pozi x3 86 412 Screw M4 x 60 SS PH Pozi x1 86 413 Frangible tab 86 436 Batteries conta...

Page 17: ... in accordance with applicable regulations Carefully pull off the switch actuation ring taking care not to lose or damage the spring Inspect the ring to ensure that the magnet is in position Remove and discard the O ring from the SART body Do NOT use sharp tools the recommended method is to squeeze the O ring between thumb and forefinger and push it until it bulges clear of the groove as shown abo...

Page 18: ...h ring groove with O align the frangible tab with this groove and ensure that the battery connectors are aligned Push the two major parts together Refit the pole bracket if applicable Fit the appropriate three screws and tighten to a torque of 1 Nm 100 cNm The SART is now fully assembled Before it can be returned to service it must be checked for integrity and performance Ensure that the SART is w...

Page 19: ...nvironmental disposal agent or in accordance with local regulations The rate of discharge must not exceed 100 mA Resistors of 68 ohms for the 6 V nominal output and 150 ohms 2 W rating are satisfactory for the SART battery UNDER NO CIRCUMSTANCE MAY THE BATTERY BE SHORT CIRCUITED If the battery shows signs of electrolyte leakage do not attempt to discharge Refer to section 1 5 for advice on correct...

Page 20: ...assumed that any faults found at a particular stage are remedied before continuing The following table is applicable to all versions of SART Fault Cause Action Dead battery Check battery volts Displaced magnet Check switch ring Red LED never on Faulty PCB Replace PCB SART in active mode Remove input signal No standby mode indication Stuck in active mode Replace PCB No active mode indication when S...

Page 21: ...scard the battery pack unless this is being replaced at the same time Ensure that a leak test is performed after replacing the O ring 5 2 Replace PCB If the PCB is suspect it should be replaced Refer to section 3 6 for disassembly and O ring replacement It is essential that the O ring is replaced Undo the two screws as shown and carefully remove the end cap Slide out the PCB noting the orientation...

Page 22: ...t requires specialised test equipment and suitably qualified technicians It is strongly recommended that PCBs are returned to McMurdo for calibration 5 4 Factory return procedure If a SART cannot be repaired in the field it should be returned to the factory The SART assessment form must be completed and returned with the SART to show the tests which have been performed and the results obtained ...

Page 23: ...ons Pole assembly 86 440 S4 RT9 mounting conversion kit 86 484A Bulkhead bracket mounting plate screws Bulkhead bracket 86 415 Pole Assembly Kit 86 631A Pole pole bracket screw User manuals McMurdo S4 RESCUE 86 920 001 Sailor SART II 86 902 005 SKANTI SART II 86 902 008 RFD Repair parts O ring 86 418 PCB module 86 510B Frangible tab 86 436 Screw 86 412 M4 x 30 Screw 86 413 M4 x 60 Spring 86 424 Ma...

Page 24: ...t to 0 1 W m2 Note 1 Duration of operation 96 hours standby followed by 8 hours minimum of transmission when interrogated with 1kHz PRF Temperature range Operating Storage 20 ºC to 55 ºC 30 ºC to 65 ºC Recovery time 10 µs max following excitation Effective antenna height 1 m Note 2 Delay 0 5 µs max Antenna vertical beamwidth 2 dB 12 5º minimum relative to the horizontal plane of the transponder An...

Page 25: ...ustained from any cause In no event shall McMurdo be liable for any breach of warranty or other claim in an amount exceeding the purchase price of the EPIRB This warranty does not affect any statutory rights of the consumer In order to be valid claims must be made under the above warranty in writing as soon as practicable after discovery of the defect or failure and within the warranty period refe...

Page 26: ...mise any adverse impact of electronic equipment on the environment both during the product lifetime and when it becomes waste Within the European Union this legislation is mandated by Directive 2002 96 EC and there is similar legislation in most other continents The directive applies to all electronic products such as IT household appliances portable electronics etc and imposes requirements to col...

Page 27: ...ignature Industries Ltd Silver Point Airport Service Road Portsmouth PO3 5PB United Kingdom Telephone Int 44 0 23 9262 3900 Fax Int 44 0 23 9262 3824 WebSite www mcmurdo co uk Email customerservice mcmurdo co uk 86 924 Iss 2 ...

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