Ghost Detector / TriFrield Natural EM Meter Operating instructions

To use the meter, turn the knob to Battery Test. The needle should be on or to the right of the diagonal line located to the right of the words "Batt Test" on the meter scale. If the needle reads left of the line, replace the battery by unscrewing the four back screws. A regular 9-volt battery will last for about 10 hours of testing; an alkaline will last for 50.

A regular 9-volt battery will last for about 10 hours of testing: an alkaline will last for 50 hours.

On MAGNETIC, the meter reads any change in the magnetic field caused by rotating the meter in the Earth's magnetic field, by a moving magnetic object, or by DC currents carried by wires or the atmosphere. The Earth's field strength is about 50 microteslas (500 milligauss), so rotating the meter from north to south rapidly (within a 0.5 second interval) causes a momentary reading of about 100 ( a change from -50 to +50). If subsequently held still, the needle will settle back to zero. For the best readings of transient fields, the meter should be placed on a stationary platform due to sensitivity to slight rotations while hand-held.

Though the body produces very little magnetic field, he electric field is strong enough to be measured. Turn the knob to ELECTRIC and multiply the reading by 10 to get units of V / m (volts per meter) thus a momentary needle peak at full scale means the field changed by 1000 V / m. During a thunderstorm, the electric field will fluctuate indoors by as much as 100 V / m. At other times, the fluctuation is less than 3 V / m, thus indoor transient phenomena are easier to detect during calm weather. Set the meter upright on a stationary metal surface for greatest sensitivity.

On SUM, the meter will add any changes in the electric field to any changes in the magnetic field, so that if either field increases or decreases, the needle will rise above zero.

The side knob controls the tone threshold. The tone sounds only if the needle deflection is sufficiently high. The tone won't sound at all if the knob is turned all the way counterclockwise.

RADIO / MICROWAVE directly reads radio waves from 50 mHz to 3 gHz, and can detect strong transmitters in the air. In most areas this always reads zero. It can also check a microwave oven for leakage. If you turn the oven on and stand six feet away, the meter should read less than half scale, or 0.2 milliwatts per square centimeter.

Email: EMF Meters