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DEVELOPMENT, MANUFACTURING AND SUPPLY OF INSTRUMENTATION
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Appendix 3
Area Survey Before Excavation Works
First.of.all,.the.area.should.be.surveyed.with.the.receiver.in.passive.mode,.in.order.to.locate.the..
signal..from..energised..power..cables,..pipes..with..cathodic..protection..or..any..other..current..providing..
utility..To.do.that,.use.the.following.frequencies.consequently:.50.Hz,.100.Hz.,.Radio.and.Broadband..
mode..Area.survey.in.broadband.frequencies.should.be.performed.in.“MIN.&.MAX”.mode,.in.lower..
sensor.mode.WB.(0-8kHz).and.Radio.(over.8kHz).
In.this.case,.the.operator.should.rely.on.“MAX”.scale.
.At.50.a.100Hz.frequencies.in.Route.mode,.the.signal.strength.will.increase.as.you.are.moving.to.
the.utility..The.following.indication.should.appear.on.the.screen.while.performing.these.actions:
First.make.sure.that.there.is.no.utility.in.the.centre.of.the.surveyed.area..To.do.that,.the.operator.
with.the.receiver.stands.above.the.tested.point.and.the.second.operator.moves.the.transmitter.around.
the.first..one..The.radius.should.be.10-20m.and.the.first.operator.should.point.the.head.of.the.receiver.
towards.the.second.operator.with.the.antenna..
Содержание Success AG-309.15 N
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