Related Manuals for Schonstedt Instrument GA-92XTd
Summary of Contents for Schonstedt Instrument GA-92XTd
- Page 1 GA-92XTd Magnetic Locator Instruction Manual Schonstedt Instrument Company 100 Edmond Road, Kearneysville, WV 25430 P: (800) 999 - 8280 www.schonstedt.com schonstedt.inf@spx.com...
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Page 2: Table Of Contents
Table of Contents SECTION I: INTRODUCTION ..................... 3 SECTION II: OPERATING CONTROLS ON/ Volume ......................5 OFF .......................... 5 GAIN ........................5 SECTION III: VISUAL AND AUDIBLE INDICATORS Gain Level ........................ 6 Battery Level ......................6 Signal Strength and Polarity ..................6 SECTION IV: CONNECTORS AND ACCESSORIES Headphone Jack ....................... -
Page 3: Section I: Introduction
Figure 1 illustrates an application of the GA-92XTd locator in which it is used to detect an iron marker 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. - Page 4 The GA-92XTd unit can be operated either in the open or closed position and any position in between (see Figure 2). Figure 2: Open and Closed Positions NOTE: In the closed position using non-lithium batteries, a slight signal may be detected in the high gain settings even if no ferrous material is present.
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Page 5: Section Ii: Operating Controls
: 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. Figure 3: GA-92XTd Face Plate... -
Page 6: Section Iii: Visual And Audible Indicators
SECTION III: VISUAL AND AUDIBLE INDICATORS Gain Level Indicator: The gain range is indicated by a 4-segment LCD as shown in Figure 4: L (Low), M (Medium), H (High) and XH (Extra High). Upon turn on, the gain defaults to M (Medium). Each press of the UP or DOWN arrow buttons will cause the gain level indicator to change accordingly. -
Page 7: Section Iv: Connectors And Accessories
SECTION IV: CONNECTORS AND ACCESSORIES Headphone Jack: The headphone jack is located on the side of the unit near the face of the locator. Headphones are optional and may be purchased from Schonstedt as an accessory. The headphone jack is monaural. Standard stereo headphones may be used, but they will produce sound in only one ear. -
Page 8: Section V: Battery Replacement
SECTION V: BATTERY REPLACEMENT The GA-92XTd is powered by one 9-volt battery. The battery is located in the handle of the instrument and can be accessed by turning the screw counterclockwise. To remove the battery, tilt the unit so that the handle is pointing down, and the battery will slide out. When replacing the battery, look at the outside of the battery door for the proper battery orientation. -
Page 9: Section Vi: Operating Recommendations & Application Notes
SECTION VI: OPERATING RECOMMENDATIONS AND APPLICATION NOTES Search Procedure Turn the instrument ON. The gain defaults to Medium (M). Grasp the locator, as illustrated in Figure 10. Since the upper sensor is located near the handle of the instrument (especially if it is being used in the collapsed position), wristwatches may produce unwanted changes in the audio signal and in the meter indication. -
Page 10: Basic Signal Patterns
Basic Signal Patterns When the GA-92XTd is positioned directly over a vertical target, the signal strength will peak (audio signal, digital readout, and bar graph) at either a positive or negative polarity. The audio signal, digital readout, and bar graph indications also peak over each end of a horizontal target. -
Page 11: Strongly Magnetized Markers
is much weaker than the signal from a larger target, such as an 18-inch length of 3/4 inch rebar which can be located at depths up to 8 feet. Figure 14: Decreasing gain Eliminates Unwanted Signals Strongly Magnetized Markers A strongly magnetized marker that is at or near the surface will provide a weaker indication on both sides of the marker, and that could be mistaken for the marker. -
Page 12: Correct Stake Orientation
Correct Stake Orientation When placing stakes, correct orientation is important. For checking purposes, the orientation of the pin relative to the locator is shown in Figure 16. Check the pin with one orientation. Then rotate the pin 180°. The orientation that gives the largest reading is the one that should be used. -
Page 13: Locating And Tracing Barbed Wire
The GA-92XTd can also be used to precisely locate the metal handles or reinforcing bars on septic tank covers at depths of up to 4 feet. Figure 19: 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. -
Page 14: Searching Areas Along A Chain Link Fence
Searching Areas along a Chain Link Fence Searching in the vicinity of a chain link fence requires a reduced sensitivity setting and some control over orientation of the locator. As illustrated in Figure 22, position the locator horizontally with its long axis perpendicular to the fence. -
Page 15: Locating Cast-Iron Pipes
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 can be located at depths up to 9 feet. Locating Steel Drums As shown in Figure 26, GA-92XTd's signal pattern will vary... -
Page 16: Locating Ordnance And Weapons
Locating Ordnance and Weapons The versatile, lightweight, cost-effective GA-92XTd is also designed to aid EOD technicians and law enforcement officers during area search operations. Figure 27: Basic Signal Patterns from Vertical and Horizontal Targets Help to Determine Target Orientation. Figure 28: A 175mm Projectile can be located up to 3 feet deep. -
Page 17: Other Notes
Other Notes A burbling sound indicates the presence of an energized power line. This will not influence the meter indication unless it is associated with a magnetic structure. The instrument will not respond to non-ferrous metals, such as gold, silver, copper, brass and aluminum. -
Page 18: Section Vii: Specifications
SECTION VII: SPECIFICATIONS (Specifications subject to change without notice) Output: Audio: Signal increases or decreases in frequency with signal strength (gradient field intensity). Audio frequency range: 30 to 4000 Hz. Visual: Expanding bar graph and +/- signs indicates polarity and signal strength. Digital readout shows gradient field intensity expressed in milligauss (mG). -
Page 19: Section Ix: Warranty/Service Information
SECTION IX: WARRANTY / SERVICE INFORMATION Limited Warranty: Schonstedt Instrument Company (Schonstedt) warrants each product of its manufacture to be free from defects in material and workmanship subject to the following terms and conditions. The warranty is effective for 7 years* after the shipment by Schonstedt to the original purchaser.
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