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proFEX MG-200 Manual

Gradiometer
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Gradiometer MG-200

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Summary of Contents for proFEX MG-200

  • Page 1 Gradiometer MG-200...

  • Page 2: Table Of Contents

    Table of Contents Part 1. Introduction 1.1 Basic technical specifications of gradiometer MG 200 1.2 Accessories included 1.3 How gradiometer works Part 2. Batteries and Charging Part 3. Gradiometer design and operation 3.1 Design and keyboard 3.2 Display mode “MENU” 3.3 Display mode “OPERATION”...

  • Page 3: Part 1. Introduction

    Sound and visual indication of MG-200 can be customized by the user to search for specific targets, which in combination with light weight (5.5 lbs.) and compact design, allows for effective search and high accessibility on difficult terrain (desert, forest, mountains, swamps, etc.)

  • Page 4: How Gradiometer Works

    “nanotesla over meter” – nT/m. Gradiometer MG-200 measures magnetic field in units which equal 4 nT. In order to translate the result into nT, simply multiply the number on display by 4.

  • Page 5: Part 2. Batteries And Charging

    Part 2. Batteries and Charging Gradiometer includes 8 standard rechargeable batteries – AA type with 2500 mAh capacity each. They allow the device to operate for 50 hours. If only 4 similar batteries are installed the device will work for 25 hours.

  • Page 6: Part 3. Gradiometer Design And Operation

    Part 3. Gradiometer design and operation This part of the manual will introduce the user to the basic modes of magnetometer operation, keyboard functions, as well as give practical advice on how to conduct effective field search and tune the device. 3.1 Design and keyboard.
  • Page 7 Menu MG 200 Pic 2. Electronic module. Front panel MG-200 Front panel of the electronic module contains display and six control buttons. Button functions change depending on which mode the device is in: “MENU” or “OPERATION”. “MENU” Mode: Button 1 – “MENU” switches between modes “MENU” – “OPERATION”;...
  • Page 8 Button 2 – ← Demagnetize; Button 3 – ↑ Filtering Button 4 – “OK” Sound Volume Button 5 – → Sensitivity; Button 6 – ↓ Correction of “0” Button 7 (top part of the device handle) – reset device measurements to “0” ON/OFF Power switch is located on the battery module of the device.
  • Page 9 Filtering can also be performed by the amplitude of the anomalies by choosing the threshold for sound signal activation. More on this in the part “Sound regulation”. “Sensitivity”. With the help of buttons 4 ”OK”, 2 ←, and 5 →, set the desired sensitivity. Its level will be shown on display during “OPERATION”...
  • Page 10 Backlight – 4; Contrast – 9; Sound regulation: Volume – 4; Threshold for sound activation: Sensitivity 1 unit – 10 units; Sensitivity 0.1 unit – 2 units.

  • Page 11: Field Work And Search With Gradiometer

    3.3 Menu Mode “OPERATION” With mode change – buttons’ functions change too. All parameters set in “OPERATION” mode will remain active during current session of work only. After turning gradiometer off and back on, parameters set earlier during “MENU” mode are automatically restored. Button 1 –...
  • Page 12 Check for the absence of magnetic objects by moving the device along your body (holding gradiometer vertical to the ground). If necessary, select new parameters for operation. Use button 1 to switch to “MENU” and choose the desired backlight, brightness, and contrast. Remember that with backlight turned on, battery time will be 5% less.
  • Page 13 search, you can move along previously stretched parallel wires. You can also move along one wire that is being moved parallel across needed intervals. 3.5 Locating objects When you find anomaly - stop, find maximum, and cross it one more time in a perpendicular direction. Center of anomaly is the point of passing through “0”...

  • Page 14: Part 4. Gradiometer Tuning

    Part 4. Gradiometer Tuning There are only two types of tuning: if there is interference from tilts, balancing of sensors is needed; if the interference is from turns, alignment of sensors is needed. These tunings are rather simple, performed as needed, and after a little practice take about a minute for balancing, and a few minutes for alignment.

  • Page 15: Balancing

    4.3 Balancing Pick an area approximately 5 by 5 feet that has no field gradient (gradient change is no more than 2- 3 units) Get rid of magnetic objects – cell phone, keys, screw drivers, metal fasteners on clothes, shoes, glasses, credit cards, watch, etc.
  • Page 16 A situation is possible when tilts to North and South give very similar results both by value and by sign and vertical position reads “0”. For example, tilt to the North gives a reading of +5, vertical reading is 0, and tilt to the South +4. Processor cannot improve the tuning with such data. In such cases instead of two tilts –...

  • Page 17: Alignment

    4.3 Alignment On a 5 by 5 foot area free of anomalies check the readings of the device while turning around. You need to see the difference in readings between North and South, and East and West. While turning the sensors should be located above the center of the chosen area and the device is held vertically.
  • Page 18 Pic. 4a Alignment. Orientation to the North Pic. 4b Alignment. Orientation to the South...

  • Page 19: Part 5 Frequently Asked Questions

    Your name, name of your company, your contact information and serial number of your device (it is briefly shown in the right part of display when power is turned on).  Detailed information about your request. Please be as specific as possible. Date Signature PROFEX electronics New York, USA...

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