45
DEVELOPMENT, MANUFACTURING AND SUPPLY OF INSTRUMENTATION
Signal of horizontally positioned sonde as it is seen by EM sensor of the receiver. “Main
peak” (general maximum) is situated above the centre of sonde’s emitting coil (equator’s
centre), and two “false peaks” (local maximums) are situated before two “nulls”
(minimums or poles).
12.1. Sonde Detection and Location of the Utility
1.. Select.“Sonde”.mode.in.menu...
2.. Before..installation.of.the..sonde.into.the.utility,..make..sure..that..sonde..is..fully.......operational,.
and.the.receiver.can.obtain.a.strong.and.stable.signal..
3.. Mount.the.sonde.on.the.push.wire.using.3.5.mm.hex.head.(not.included.in.supply)..You.
have..to.match.the.hole.on.the.wire.with.the.mounting.hole.on.the.sonde..
4.. Push.the.sonde.into.the.pipe..In.order.to.start.location,.you.have.to.push.it.no.less.than.3m..
from.the.operator...
You.must.stay.within.the.field,.generated.by.the.sonde.in.order.to.locate.it..Field.range.depends.
on.the.type.of.sonde,.pipe.material,.depth.and.soil.type...
.To.locate.the.Sonde,.find.the.area.with.the.maximum.signal.level..
5.. To.locate.the.approximate.direction.of.the.sonde,.point.the.locator.to.the.utility.to.search.
the.area.for.signal,.slowly.moving.the.locator.perpendicular.to.the.ground.around.the..spot..
By.looking.at.maximum.value.of..four-digit.number.on.receiver.display,.you.can.see.the.signal.
level...
Signal.level.reaches.its.maximum,.when.the.lower.antenna.is.positioned.as.close.as.it.is.possible..
to.the.sonde..Sound.indication.of.the.receiver.will.help.to.locate.the.spot.of.the.maximum.signal...
The.signal.will.be.at.its.maximum.when.the.locator’s.axis.is.perpendicular.to.the.sonde’s.axis.
(utility.axis).and.the.locator.is.pointing.at.the.sonde...
When.approaching.the.sonde,.the.signal.level.will.rise.(together.with.the.tone.of.sound.indication).
6.. When.the.approximate..direction..of..the..sonde..is..located,..position..the..device..strictly..
perpendicularly.to.the.utility.axis.and.walk.in.the.sonde’s.direction....
At.the.point.of.maximal.signal,.the.locator,.pointed.strictly.perpendicularly.to.the.utility.should.
be.moved.along.the.equator.line,.until.it.reaches.its.maximum.signal.point...
7.. When.the.receiver.is.positioned,.try.to.move.it.left,.then.right,.in.order.to.locate.false.peaks....
Each.peak.consists.of.two.signal.values:.one.with.critical.signal.level.rising.and.the.second.with.
some.signal.level.rising..If.these.local.false.peaks.are.presented.in.the.area.and.the.sonde.has..
horizontal..orientation,..it..means..that..the..locator..is..positioned..strictly..over..the..sonde..and.the.
utility.has.been.located...
NOTE
The.place.with.maximum.signal,.generated.by.the.declined.sonde,.can.be.positioned.off.the..
equator.line.(see.“Declined.sonde”.for.more.information)..
ATTENTION!
Standing on the equator doesn’t mean that you are standing over the sonde; Remember,
that the key goal of locating the sonde is to locate the spot with a maximum signal. You
must be at the point of the strongest signal in order to locate the sonde.
Summary of Contents for AG-309.15G
Page 1: ......
