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JW Fishers PROTON 4 Скачать руководство пользователя страница 8

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PROTON 4 MAGNETOMETER

INTRODUCTION

The PROTON 4 Magnetometer is a precision electronic instrument that measures the strength of the earth's
magnetic field. Once the magnetometer is set up in an area, it will inform the operator of the strength of the
earth's magnetic field in that area (in gammas). More importantly (for our application), if anything is brought
into that area that alters the earth's magnetic field, it will change the readout of the magnetometer. For an
object to alter the earth's magnetic field, it must be constructed of a ferromagnetic material (iron content). Any
material that a magnet is attracted to will alter the earth's magnetic field and therefore can be detected by a
magnetometer.

The earth's magnetic field varies in intensity over the surface of the earth (see world map in box).

Note: A world map showing the gamma readout in all areas of the world is also available on-line at
http://geomag.usgs.gov/charts Select the PDF "Total Intensity World" and use the zoom tool.

At the poles, the field is concentrated and therefore has a high intensity. A magnetometer would read in the
61,000 gamma area at the poles. At the equator, the field is quite weak. A magnetometer would read in the
24,000 gamma area at the equator. In any given area of the world, the field is fairly even. If an iron object is
introduced into the area, the lines of force are disturbed. The amount of disturbance is a function of the mass
of the object.

Over the past 35 years, almost every major wreck found was done so with a magnetometer. The metal-hulled
ships and barges are, of course, easy targets and can be detected from hundreds of feet away. The Spanish
galleons laden with gold and silver (metals not detectable by a magnetometer) were found by the
magnetometer detecting the ships' anchors or ballast stones (magnetite was often used as ballast). One of
the largest finds to date was a galleon off Florida, found 35 years ago, carrying four hundred million dollars
worth of gold and silver. The wreck was found with a proton magnetometer (detected the anchor).

EARTHS MAGNETIC
FIELD - NORMAL

EARTHS MAGNETIC
FIELD - IRON OBJECT

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Содержание PROTON 4

Страница 1: ... 4 OPERATION AND MAINTENANCE MANUAL MARINE MAGNETOMETER REV 0609 JW FISHERS MFG INC 1953 COUNTY ST E TAUNTON MA 02718 USA 508 822 7330 800 822 4744 FAX 508 880 8949 Email jwfishers aol com WEB www jwfishers com ...

Страница 2: ...MAGNETOMETER OPERATION AND MAINTENANCE MANUAL MARINE MAGNETOMETER PROTON 4 JW FISHERS MFG INC 1953 COUNTY ST E TAUNTON MA 02718 USA 508 822 7330 800 822 4744 FAX 508 880 8949 Email jwfishers aol com WEB www jwfishers com ...

Страница 3: ...CTION TO MAGNETOMETERS 8 THEORY OF OPERATION 9 SYSTEM BREAKDOWN 10 LORAN C AND GPS INTERFACE 14 25 OPERATION 15 BATTERY HOOKUP 15 28 TUNING 17 FIELD USE 19 SHALLOW WATER TOWING 21 SEARCH PATTERN 22 23 PROCEDURES filling sensor housing disassembly adjustments map instructions 24 TROUBLESHOOTING 35 WARRANTY 36 ...

Страница 4: ...rate with two fully charged 12 v batteries Verify readings by numerous passes before diving Use only non ferrous metal on the Fish screws etc Use 12 wire or larger to extend battery cable if needed If you are using the UA2 altimeter be sure the sync cable from the Proton 4 control box is connected to the back of the UA2 If the UA2 is allowed to free run it will interfere with the Proton 4 readout ...

Страница 5: ...Sensitivity adjustable resolves 1 20 gamma Maximum detection distance 1500 plus Cycle time adjustable 2 4 seconds Tow speed 1 10 MPH Input voltage 24 vdc Power consumption 40 W MATERIALS COLOR Fish High impact stainless yellow Control Box High impact case black Cable 8 conductor polypropylene yellow OPTIONS 300 ft cable Chart recorder printer GPS Loran interface GPS receiver Altimeter RS232 Comput...

Страница 6: ...can change up increment or down decrement depending on what is happening to the magnetic field in the area It is not unusual when making many passes in different directions over a target to find some passes incrementing the readout number and other passes decre menting the number In most cases when you approach a target the gamma number will drop as shown in the example above MAGNETIC DEVIATION CH...

Страница 7: ...l grid lines This would result in a pass every 45 m first pass plus the second pass MAGNETIC DEVIATION CHART continued 10 m 100 m 1 Kilometer 1 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 10 gamma change 100g 1 000g 10 000g 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 100g 10g 20 gamma change 1 lb 1 0 lb 1 0 0 lb 1 0 0 0 T o n 1 0 ...

Страница 8: ...Intensity World and use the zoom tool At the poles the field is concentrated and therefore has a high intensity A magnetometer would read in the 61 000 gamma area at the poles At the equator the field is quite weak A magnetometer would read in the 24 000 gamma area at the equator In any given area of the world the field is fairly even If an iron object is introduced into the area the lines of forc...

Страница 9: ...small voltage pulses in the coils which are amplified by the Fish and sent across the cable to the Control Box To optimize the amplifier in the Fish the amplifier is tuned by a switch for the frequency gammas of the pulses in your area see world map in shipping box The tuning is very broad Once the fish is tuned it will operate over a very large area 1500 gamma When the Control Box receives the si...

Страница 10: ...sor head Proton Bottle from salt water The 4 tube contains the Sensor Coils and the Pre Amplifier The Pre Amplifier contains a 10 position tuning switch which tunes the Fish to your area The Fish must be capable of being tuned from 24 000 to 61 000 gammas see world map To optimize tuning a ten position binary switch 100 different combinations is used to cover the full range of gammas Each switch p...

Страница 11: ... Control Box receives the signal pulses from the Fish filters the signal and counts the pulses After the pulses are counted it stores the results and displays the count on the five digit LCD readout The Control Box contains a single main logic board MAIN LOGIC BOARD MLB The MLB is divided into three sections analog digital and power supply The analog section receives pulses from the tow fish filte...

Страница 12: ...pinpoint the target G1 A one digit change indicates a one gamma change Most sensitive position used to locate small targets Best position if readout is steady not jumping around G5 The gamma reading is divided by 5 before it is displayed A one digit change in the readout indicates a five gamma change More stable than G1 used for most magging operations if in noisy area G10 The gamma reading is div...

Страница 13: ... all times When not using the plug should be placed in a small plastic bag UA2 SYNC PLUG If a UA2 altimeter option is installed on the Proton 4 a cable must connected between the UA2 and the Proton 4 control box This cable enables the UA2 to operate with the Proton 4 without causing interference Readout jumping around to the Proton 4 INPUT POWER CABLE Extending from the rear of the Control Box is ...

Страница 14: ...4 Control Box the printer will print out the position coordinates The position coordinates will also be sent to the optional RS232 computer interface if equipped See P2 page 17 for proper wiring of a 0183 interface from a Loran C or a GPS receiver to the Proton 4 See your Loran C GPS manual for receiver operating instructions RS232 COMPUTER INTERFACE Enables the gamma readings and LORAN C GPS coor...

Страница 15: ...me and want to check out the unit see procedure P3 on page 25 P3 is a procedure to check out the system from inside of a building TUNING AND CHECKOUT CRITICAL Select an area outside the city that is free of power lines and buildings at least 300 away and away from any large metals junk cars dump etc The unit will not work in a city or in areas saturated with metal The unit may not work in a park o...

Страница 16: ...ower switch is turned off To insure the unit is properly working have a second person approach the fish with a gallon size steel can When the can is within 6 of the head of the fish the system should start seeing the can the numbers in the readout should start down As the can is moved closer to the head the numbers should continue to go down Put the sensitivity switch in the G1 position This is th...

Страница 17: ... on the preamp board and using the chart on thenextpagetunethepreampboardbyturningon 1 oroff 0 eachofthe10switchesandsetting jumper J1 on or off Take care not to damage the board 5 When reassembling the preamp housing be sure the o ring is in place and do not over tighten the four screws on the faceplate NOTE The tuning switch can be changed while the unit is running While the unit is running watc...

Страница 18: ...35 000 0 0 1 1 1 0 1 0 1 0 56 500 0 1 0 1 0 1 1 0 0 0 34 500 0 0 0 0 1 1 1 0 1 0 56 000 1 1 0 1 0 1 1 0 0 0 34 000 0 1 1 0 1 1 1 0 1 0 55 500 1 0 1 1 0 1 1 0 0 0 33 500 0 0 0 0 0 0 0 1 1 0 55 000 0 1 0 0 1 1 1 0 0 0 33 000 0 0 1 0 0 0 0 1 1 0 54 500 0 0 1 0 1 1 1 0 0 0 32 500 0 0 0 0 1 0 0 1 1 0 54 000 1 0 1 0 1 1 1 0 0 0 32 000 0 0 0 1 1 0 0 1 1 0 53 500 1 1 1 0 1 1 1 0 0 0 31 500 0 0 0 1 0 1 0 1...

Страница 19: ...in READOUT that lasts for many cycles 2 READOUT will normally change up or down while towing When you are towing the FISH the READOUT will gradually change as you are making a run the earths magnetic field is different every 20 or so This is especially true when magging just off shore What you look for is a deviation of the pattern DEVIATION EXAMPLE We were magging for a large object 1 2 of a tank...

Страница 20: ...rope to pass next to the motor the motor generates a lot of electrical noise which can be picked up by the cable and cause the readout to be unstable At the end of a run do not make a sharp turn but rather a medium turn at increased speed to prevent Fish from sinking to the bottom At 2 MPH and 150 of tow rope out the Fish will be approximately 20 deep To retrieve the Fish while towing slow boat to...

Страница 21: ... inch PVC tubing with a cap glued on each end The ropes are tied off on each end of the Fish A single ball float can also be used DEEP WATER TOWING If towing 25 200 deep then a downrigger must be used Suspend the depressor wing fromaseparatecableandtietheFish10 15 backfromthewing Thissetupgivesexcellentdepthcontrol When used with an Altimeter our UA 2 very precise control is attainable F L O AT 6 ...

Страница 22: ...ll in the mag and pick up all buoys except the four outside buoys left for reference Lay out the buoys for an adjoining block and repeat the sequence PINPOINTING THE WRECK Despite its sensitivity pinpointing a wreck is quite simple SMALL OBJECTS small or large change that lasts for one or two cycles If you get a reading indicating a small metal mass drop the first buoy when the readout indicates a...

Страница 23: ... next series of passes will pinpoint the target After dropping buoy 3 swing the boat around so that you will be making a run that is perpendicular to the first two runs and cuts through the center area of buoys 2 and 3 this run should produce very large changes in the readout When the mag picks up the target drop buoy 4 for a straight line reference and continue on course When you lose the target ...

Страница 24: ...1 Filling sensor housing with charcoal lighter fluid P1 1 Nose cone removal P2 Loran C and GPS cabling P3 System checkout From inside of a building P4 Fish tail section removal P5 Fish preamp access for tuning P6 Map instructions P7 12 v battery hookup P8 Tow line replacement P9 Cablewiring P10 Fish Pre Amp replacement P11 RS232 cabling ...

Страница 25: ...e bolt 5 Wear safety glasses 6 Using a small funnel slowly pour the charcoal lighter fluid into the 5 8 center hole Continue filling until the liquid comes out of the vent hole The sensor chamber will hold about 1 1 2 quarts 1 4 L 7 When the chamber is full insert the plugs back into the holes finger tight Shake the mag slightly to getanytrappedairtothetopofthechamber youcanhearthefluidsloshingaro...

Страница 26: ...to the Proton 4 as follows Note The wire has 4 conductors only the red and black wires are used Interface Cable 2 GPS ADAPTOR A modified three pin DIN connector on one end and a 9 pin D connector on the other Many GPS Systems are supplied with a 9 pin D serial data output cable Use Interface Cable 2 to adapt the 9 pin D serial data cable to connect to the 5 pin DIN connector on the Proton 4 contro...

Страница 27: ...t the tuning switch as per instructions in the operation section of this manual P3 SYSTEM CHECKOUT FROM INSIDE OF A BUILDING The system will not work properly from inside of a building readout will jump around but the system can be checked to be sure it is cycling properly Cable up the unit and apply 24 vdc When you turn the unit on it should operate as stated in the manual except the readout will...

Страница 28: ...themagintheG1position Ifyourimmediate area is located between the purple lines then your frequency will be less or more than the number on the line The map gamma numbers are approximate however the actual readout should be in the area Once you have established what the gamma reading should be in your area the fish is tuned by turning on or off each of the 10 switches on the pre amp board The red d...

Страница 29: ...es could damage the Proton 4 control box batteries and power cable It is recommended that the boat battery not be used The engine electrical noise could cause the Proton 4 readout to be unstable Proton 4 Control Box W h ite Bla ck G re e n Jum per supplied 12 volt Battery 12 volt Battery Note grounding the 12 volts helps to reduce noise which gives a steadier readout Ground Ship Ground or directly...

Страница 30: ...ws from the tow collar note that the hole and slot are on the top side of the tail section 3 Pull back on the tail section of the fish Refer to P4 4 Remove the preamp housing Refer to P5 REMOVE 4 REAR SCREWS DO NOT REMOVE 4 FRONT SCREWS PROTON 4 Cable Tail Section C E N TE R S H E I L D R E D W H I TE A N D O R G R E E N B R O W N B L U E B L A C K PR OTON 4 PR EAM P BO ARD 3 FEED TH R U S C H R O...

Страница 31: ...R O M E C A B L E T O W C A B L E T O C O N T R O L B O X T O S E N S O R C O I L S C O A X B L A C K R E D D e p e n d ing o n ca b le le n g th 9 Pin Connector to Control Box 1 2 Pin Center Sheild Brown Green White Red Blue Black Preamp in Fish Cable to Control Box Connector 3 4 5 6 7 8 RED BLACK 2 FEED THRU S Pin 1 Coax center This wire carries the return signal from the preamp board in the tow...

Страница 32: ...older wires going to the feed thru fittings 6 Remove two screws holding Pre Amp to mounting plate 7 Install new board REASSEMBLY 1 Reverse above procedure NOTE Be sure to clean o ring and seat The o ring should be lubricated with silicon grease before installing C E N TE R S H E I L D R E D W H I TE A N D O R G R E E N B R O W N B L U E B L A C K PR OTON 4 PR EAM P BO ARD 3 FEED TH R U S C H R O M...

Страница 33: ...cluded with magnetometer Below is a photo of the pressure test plug Make sure there is an O ring under the head of the plug 4 Screw in the pressure plug in place of the plug removed in Step 2 Snug down the plug but do not over tighten 5 Attach a bicycle pump to the pressure fitting Pump about 10 to 15 pounds of air into housing CAUTION DO NOT EXCEED 15 LBS 6 Place fish in water A few bubbles will ...

Страница 34: ...to include LORAN C GPS and gamma readings Use the shorting plug to connect the right pin and the center pin to include gamma readings only If your Proton 4 was purchased with the Loran C GPS interface the P12 jumper was factory installed in the left hand position If you do not have your Loran GPS receiver hooked up false position information will be transmitted on the RS232 interface If this cause...

Страница 35: ...A Gamma reading carriage return line feed The message repeats once for each cycle of the magnetometer TheRS232interfaceusestwowiresandiswiredtothemodifiedthreepinDINconnector CENTERPIN CUTOFF on the PROTON 4 as follows PIN 1 White PIN 3 Black 2 4 5 Not used pin 2 pin 5 White Black Note connect shield to black wire at both ends 3 Enlarged front view of cut off modified 3 pin connector 3 pin DIN Con...

Страница 36: ...ming from the fish Possible causes 1 Broken cable 2 Damaged cable connector where fish cable plugs into control box 3 Bad preamp in fish PROBLEM 2 Proton 4 stops cycling One or both 12 volt batteries need recharged CALL FACTORY IF ANY PROBLEMS 800 822 4744 ph 508 822 7330 ph 508 880 8949 fax jwfishers aol com email ...

Страница 37: ...Warranty does not include broken or damaged tow line or lost equipment Should service be required contact us explaining the nature of the problem Most problems can be isolated over the phone and correct replacement parts sent to you In some cases we may have you return an assembly for checkout In almost all cases the Proton 4 is field repairable ...

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