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DEVELOPMENT, MANUFACTURING AND SUPPLY OF INSTRUMENTATION
12.2. Declined Sonde
The..sonde..is..considered.to.be..declined..when..its..position..is..not..parallel..to.the..horizontal..
ground..surface..It.most.commonly.occurs.when.the.utility.changes.its.vertical.direction..Finding.
the..poles.of.equator.can.help.figuring.out.if.the.sonde.is.declined.or.not.
When..the..sonde..is..declined,..the..equator..will.not.be..positioned..in..the..middle..between..two..
poles..When.the.sonde.is.significantly.declined,.the.equator.can.be.positioned.off.sonde’s.centre.
and.the.maximum.signal.point.can.be.positioned.near.one.of.the.poles..
Sometimes,..when..the..sonde..is..positioned..strictly..vertically..(perpendicular..to..ground..sur-.
face),.one.of.the.poles.will.be.positioned.strictly.together.with.the.max.signal.point...The.second.
pole.will.not.be.visible.at.all..In.any.case,.in.order.to.locate.the.position.of.the.sonde,.find.the.spot.
with.the.maximum.signal.level..
12.3. Measuring the Depth of the Sonde
ATTENTION!
The.receiver.must.be.switched.to.Sonde.mode.because.electromagnetic.field,.
generated.by.the.sonde.has.complex.2-line.quasi.toric.form..
1.. In.order.to.measure.the.depth,.you.have.to.position.the.locator.perpendicular.to..the.ground,..
strictly.over.the.sonde..You.have.to.slowly.move.the.device.around,.in.order.to.get.the.best.signal.
and.best.depth.reading...
2.. Press. and. hold. “down”. button. on. the. locator. for. 1. second.. It. will. enable. the. depth.
measurement..Measured.depth.will.appear.on.the.screen...
In.order.to.confirm.the.readings.of.the.depth,.you.have.to.do.the.following:):.
1.. Remember.the.depth.value.you’ve.just.received..
2.. Raise.the.locator.to.150mm.above.ground.surface..
3.. Look.at.the.depth.change..The.depth.should.increase.by.150mm...
If.the.depth.value.remains.the.same.or.increased.more.than.it.was.intended,.it.can.mean.the..
following:.signal.field.is.distorted,.the.signal.is.too.low.(for.example,.the.batteries.of.the.sonde..are.
dying).or.wrong.location.of.sonde’s.signal.equator..(the.original.depth.was.measured.at.wrong..
place)..
NOTE
The..value.of.depth,.measured.as.described.above,.is.true.for.undistorted.signal..If.the.signal.
is.distorted,.depth.readings.can.be.distorted..Use.the.depth.value.only.as.approximate.reference..
Before.ground.works,.try.to.measure.burial.depth.of.located.utility.with.any.available.method..
Summary of Contents for AG-309.15G
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