INSTRUCTION MANUAL Magna-Trak 100® Magnetic Locator 1
Thank you for purchasing the Magna-Trak 100® Magnetic Locator. Please read this manual thoroughly before operation. CONTENTS 1. Introduction .............................................................................................................. 3 2. Theory of Operation ................................................................................................ 3 3. Features ......................................................................................................................
a a a aa 1. INTRODUCTION aaaaa The Magna-Trak 100® magnetic locator is a flux-gate type of magnetometer which incorporates a unique patented technology that enables the factory to balance the magnetic sensing coils to a finite condition. This patented method of magnetic balancing is advanced in the state of the technology. The Magna-Trak 100 implements “peak response” over ferromagnetic objects by yielding an increasing audio signal as the object is approached and passed over.
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4. BASIC OPERATION AND DESCRIPTION 4.1 Power On/Off Switches Press “ON” once to activate the locator circuitry. Press “OFF” once to turn the battery power off. 4.2 Volume and Sensitivity Control Knobs Rotate the volume knob to the desired audio volume level. Full volume is achieved when the knob is turned fully clockwise. The sensitivity or depth range can be varied using the sensitivity knob. Maximum range is provided at full clockwise rotation.
5. BATTERY REPLACEMENT The LCD will display a flashing “Low Battery” warning when the batteries fall below a predetermined voltage level, alerting you to replace the batteries soon. Several hours of battery life remain; however, in cold temperatures, this time may be shorter. Replace the batteries as follows: 1: Turn the power off. 2: Unscrew the thumb screw on the battery cover (2-5 turns) and lift the cover off until the tab at the rear of the cover clears the slot it is located in.
6. FIELD OPERATION The recommended search position is a 45° angle from the earth’s surface. Scan the locator pole from side-to-side in a slow sweeping motion while walking in a steady direction. Maintain a consistent height above the ground during the side-to-side sweeping motion. Once the object being searched is located, pinpointing the object’s location can be accomplished by holding the locator vertically and sweeping it in an “X” pattern until the absolute signal peak is found (Fig. 2).
aaaaaa 6.1 Water Locations The pole section of the locator can be submerged into water, up to just under the plastic case (Fig. 3). aaaa Fig. 3 6.2 Locating Near a Steel Fence Move or slide the locator across the ground while holding the length of the locator body perpendicular to the fence. Do not roll the locator on the ground. Maintain a consistent distance between the tip of the locator and the fence. The object will be directly below the tip of the locator (approx. 1⁄4" from the tip). Fig.
aaa 7. SIGNAL RESPONSE Figure 5 shows audio and LCD visual signal response to: 1: no object, 2: one small deeper metal target, and 3: a second larger and shallower metal object. The LCD display indicates both the numeric digital and analog bar-graph response as the locator passes over the ground. (1) (2) (3) a a Fig.
7.1 Typical Signal Responses The metal handles on the septic tank cover will provide a usable signal to determine the location of the actual cover (Fig. 6). Signal Response Fig. 6 Large metal objects may cause double signals as indicated (Fig. 7). Signal Response The center of the cover is found by sweeping the locator back and forth to create a ring pattern response. The center null will designate the cover’s center. Sewer Cover Fig.
8. SPECIFICATIONS Power: Six “AA” (11⁄2 volt) batteries Battery life: ±100 hours of intermittent operation (alkaline batteries) Output: Powerful magnetic speaker with waterproof Mylar cone LCD Display: Numeric digital, analog Bar-graph and low battery indicator feature Weight: Approximately 3 lbs. (1.3kg) with batteries Operating temperature: 0°F to 120°F (-18°C to 49°C) Length: 40 inches (101.6 cm) Construction: High-impact water resistant plastic, epoxy painted.
450 S. CIPS Street • P.O. Box 359 Watseka, IL 60970 USA (815) 432-5237 Toll Free US: (800) 435-1859 FAX (815) 432-2417 http://www.cstsurvey.
