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Figure 22: Abrupt Drop of Signal while Searching along a Chain Link Fence

Locating Valve Boxes

Both the valve and its casing, when iron, provide strong magnetic
fields, which make them easy to locate. Plastic enclosures
containing magnets (which are typically used with non-ferrous valve
boxes) are easily located at depths of up to 11 feet.

Figure 23: Locating Valve Boxes and Casings

Locating Cast-Iron Pipes

Cast-iron pipes produce the strongest magnetic signals at their joints.

Figure 24: Signal patterns provided by Cast-Iron Pipes

Содержание MAGGIE

Страница 1: ...Instruction Manual MAGGIE Magnetic Locator Schonstedt Instrument Company 100 Edmond Road Kearneysville WV 25430 P 304 725 1050 l www schonstedt com l schonstedt inf spx com ...

Страница 2: ...Barbed Wire 11 Searching Areas along a Chain Link Fence 12 Locating Valve Boxes 13 Locating Cast Iron Pipes 13 Locating Steel Drums 14 Locating Ordnance and Weapons 15 Other Notes 16 SECTION VII SPECIFICATIONS 17 SECTION VIII TECHNICAL SUPPORT 18 SECTION IX WARRANTY SERVICE INFORMATION 18 October 2018 Important Notice Schonstedt believes the statements contained herein to be accurate and reliable ...

Страница 3: ... additional information to help you pinpoint a target and determine its orientation Figure 1 illustrates an application of MAGGIE in which it is used to detect an iron marker of the type used for property line identification As shown the magnetic field of the iron marker is stronger at sensor A than it is at sensor B This creates a signal strength that is larger than zero which would occur when th...

Страница 4: ...ton a third time MUTES the volume Additional pushes of this button cycle the volume through HIGH MEDIUM MUTE OFF To turn the unit off push this button GAIN The sensitivity of the unit can be increased to detect smaller objects at greater depths or decreased to detect larger objects at smaller depths by adjusting the gain up or down pushing the UP or DOWN arrow buttons F Figure 2 MAGGIE Face Plate ...

Страница 5: ...k This could be temporary and all segments will change to black as the temperature increases Figure 4 Battery Voltage Status Indicators Signal Strength and Polarity Indicator The signal strength defined as the difference or delta Δ between the magnetic field detected at the top and bottom sensors is shown as a numerical indication in mG milligauss units preceded by the polarity of the signal or an...

Страница 6: ...at headphones are not in use This aids in making the instrument more water resistant Figure 7 Headphone Jack Plug SECTION V BATTERY REPLACEMENT MAGGIE is powered by one 9 volt disposable battery The battery is located in the handle of the instrument and can be accessed by turning the screw counterclockwise by hand or with the use of a screwdriver or coin To remove the battery simply tilt the unit ...

Страница 7: ...ep the locator from side to side When the locator comes within range of an iron object the signal strength will peak causing the frequency of the audio signal to peak the bar graph to expand in the positive or negative direction and the digital readout to peak as well This is shown in Figure 10 Figure 9 Searching with the Locator Figure 10 Illustration of Visual Indicators within Range of an Iron ...

Страница 8: ...er you have detected the presence of a target hold the locator vertically and slowly move it back and forth in an X pattern while listening to the audio response and observing the bar graph indicator For a given gain setting the number of bars will be greatest when the locator is directly over a vertical target and over the ends of a horizontal target The X pattern as shown in Figure 12 is ideal f...

Страница 9: ... sides of the marker that could be mistaken for the marker The heavy line in Figure 14 represents the increase and decrease in the audio and bar graph indications as you move the locator over a marker Between points A and B the signals increase slightly and then decrease Just beyond B the signals increase rapidly peak directly over the marker and then decrease at point C From C to D the signals in...

Страница 10: ...e magnetization induced by the Earth s magnetic field The induced magnetization is always downward in the Northern Magnetic Hemisphere and produces a positive output no matter which end of the stake is driven into the ground The other type of field is the permanent magnetization which is fixed to the pin For maximum detection the stake should be driven into the ground such that the permanent magne...

Страница 11: ...andles or reinforcing bars on septic tank covers at depths up to 6 feet Figure 18 Signal Patterns provided by Septic Tank Covers Locating and Tracing Barbed Wire You can often trace barbed wire from old fence lines buried just beneath the surface Even if the wire is only a trail of rust it can still be detected near the surface Tip the locator a little lower than usual but not parallel with the gr...

Страница 12: ...as illustrated in Figure 21 This insures that the upper sensor is kept away from the fence Figure 21 Searching in the Vicinity of a Chain Link Fence Perform the search by slowly moving the locator forward along the fence while also moving it to the right and to the left This technique allows you to search an area several feet wide as you move forward Listen for an abrupt drop in the signal as show...

Страница 13: ...lds which make them easy to locate Plastic enclosures containing magnets which are typically used with non ferrous valve boxes are easily located at depths of up to 11 feet Figure 23 Locating Valve Boxes and Casings Locating Cast Iron Pipes Cast iron pipes produce the strongest magnetic signals at their joints Figure 24 Signal patterns provided by Cast Iron Pipes ...

Страница 14: ...re the maximum signal levels occur 5 Return to an area of maximum signal strength and hold the locator several inches above the surface The sensitivity will probably have to be reduced during this second pass Four inch pipes joints and transition points can be located at depths up to 11 feet Locating Steel Drums As shown in Figure 25 MAGGIE s signal pattern will vary depending on the vertical or h...

Страница 15: ...ement officers during area search operations Figure 26 Basic signal patterns from vertical and horizontal targets help to determine target orientation Figure 27 A 175mm projectile can be located up to 4 feet deep Figure 28 An 81mm mortar can be located up to 14 inches deep Figure 29 MK81 low drag bombs can be located up to 10 feet deep ...

Страница 16: ... A burbling sound indicates the presence of an energized power line or the presence of 50 60Hz This will not influence the meter indication unless associated with a magnetic structure 2 The instrument will not respond to non ferrous metals such as gold silver copper brass and aluminum ...

Страница 17: ...um Input Power Supplied by one 9V battery Battery Life 24 Hours intermittent usage Operating Temperature 13 F to 140 F 25 C to 60 C Water and Dust Resistance Rated IP54 when operated with earphone jack plug provided Overall Length 32 5 in 83 cm Nominal Sensor Spacing 20 in 50 cm Weight 2 6 Lb 1 2 Kg Construction Material High impact ABS This device complies with part 15 of the FCC Rules Operation ...

Страница 18: ... be billed Specifically this warranty does not cover product that has been subject to inundation by fire water or other liquid intrusion or units that have been damaged or compromised due to repair alteration or modification by anyone other than an authorized repair representative Prior to a repair being performed by Schonstedt a cost estimate will be submitted and no work will be completed until ...

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