The M-101 will not respond to non-metallic targets such as plastic or fiberglass. The M-101 is not designed to be a wire or pipe tracer. Fisher Research manufactures other specific equipment for that purpose.
DECREASE SENSITIVITY HEAD PHONES Sensitivity This.control.turns.the.M-101.On.&.Off..It.also.permits a wide range of sensitivity to metal targets. MAXimum position.is.normally.used.in.the.initial.scanning.and.locat- ing.operation..MINimum.or.reduced.sensitivity.is.used.to. help.pinpoint.metal.objects. Penetration Controls.the.depth.of.penetration...This.knob.is.free.spin- ning.and.does.not.have.stops.in.either.direction. Meter Gives.a.visual.display.of.signal.strength.and.Battery.Test Battery Test Used.to.test.the.condition.of.the.batteries.in.the.M-101. Battery Access The M-101 is powered by two 9 volt batteries. Access to the.batteries.is.on.the.back.of.the.detector.
OPERATION TEST BATTERIES Turn.the.M-101.On.(Sensitivity.control.knob)...Depress.the. Battery.Test.button...A.response.of.80.or.more.on.the.meter. indicates.batteries.are.in.an.operable.condition... NOTE: Occasionally check the batteries during use, as weak batteries.could.lead.to.reduced.signal.depth. SCANNING Turn.the.M-101.On.(Sensitivity.control.knob).to.the.RED. arrow. If there is a sound and meter reading, reduce (turn counter-clockwise) the Penetration control, or move search coil away from any nearby metal.
PRINCIPLES OF OPERATION When the unit is properly tuned, the M-101 will locate ½ inch (1.25 cm) diameter rebar 8 to 9 inches (20 to 23 cm) from the bottom of the search coil. A larger target can be located deeper, a smaller target shallower.
SPECIFICATIONS Subject to improvement or modification without notice. Operating Frequency of Search Coil: ..4.5.kHz Sensitivity Adjustment . Range:.12:1 Output Indication:..Meter.-.1.milliamp,.1.-.100.linear.scale ..........Speaker.-.16.Ohm.impedance ..........Headset.(optional).-.8.Ohm.impedance Audio Frequency:... 450.Hz Power Supply:....+/-.9.V,.(2).9V.NEDA.1604 Coil Configuration: ..Double.D Weight: ......2.8.lbs.(1.3.kg) Dimensions: .....
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Q U A L I T Y Fisher detectors are renowned for their quality. Each detector is hand crafted in the USA with pride P E R F O R M A N C E The worldwide underground utility industry relys on Fisher. Our instruments are durable, dependable, and locate deeper.