MAGNA-TRAK 100 MAGNETIC LOCATOR

Theory of Operation
The Magna-Trak 100 locator finds ferromagnetic objects by sensing the magnetic field radiated by the object. The locator contains two sensor coil assemblies that are precisely spaced and electronically balanced to achieve a new magnetic balanced operating condition. In a uniform magnetic field, such as the earth's field, the two sensor coils maintain a magnetic balanced status, because both of the coils experience the same magnetic lines of force. However, when a ferromagnetic object is approached the field strength and angle of the magnetic lines upon each sensor is different. This difference, although minute, is enough to offset the critical balance and produce an audible indicating signal.

When no ferromagnetic objects are present, the speaker emits a steady low frequency tone. As the object is approached, the audio frequency increases until the center of the object is directly beneath the locators lower tip. The frequency peaks and then decreases as the object is passed. The peak indicates the exact location of the object.

Non-ferrous objects do not effect the locator. Objects made of brass, aluminum, copper, etc. are ignored.

LCD VISUAL DISPLAY

Several visual display functions are provided for ease of operation as defined below.

Digital Signal Indicator: A two digit numeric display shows the general signal level related to the audio signal response being heard from the speaker. At the lowest signal level when no magnetic metal is present, a small number will be viewed between "0" and "5". As metal is approached, the numbers will increase until "95-99" is viewed. Deeply buried objects or lower sensitivity levels will yield a lower peak number to aid in pinpointing.

Analog Bar: Graph Signal Indicator - the bar graph corresponds directly to audio frequency by expanding outward from the center "diamond" as the signal increases due to magnetic metals.