3M 2220M 用户手册
3
Sonde Locating
A.sonde.is.a.small.transmitter.that.enables.the.user.to.trace.metallic.and.
nonmetallic.pipes,.sewers,.drains,.or.ducts..It.can.also.be.used.to.find.a.blockage.
or.collapse..Refer.to.sonde.manufacturer’s.guide.for.proper.selection.of.sonde.
for.the.desired.application.
A.representation.of.a.sonde.transmission.field.appears.below.
nonmetallic.pipes,.sewers,.drains,.or.ducts..It.can.also.be.used.to.find.a.blockage.
or.collapse..Refer.to.sonde.manufacturer’s.guide.for.proper.selection.of.sonde.
for.the.desired.application.
A.representation.of.a.sonde.transmission.field.appears.below.
There.are.typically.three.peak.signals.present..The.strongest.peak.signal.is.over.
the.center.of.the.sonde..The.signal.will.drop.off.each.‘side’.or.‘end’.of.the.sonde,.
and.then.rise.again..The.‘drop.off.points’.are.referred.to.as.nulls.
the.center.of.the.sonde..The.signal.will.drop.off.each.‘side’.or.‘end’.of.the.sonde,.
and.then.rise.again..The.‘drop.off.points’.are.referred.to.as.nulls.
Sonde Locating Screen
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1.. Speaker Icon.–.Indicates.audio.level
2.. Bar graph –.Graphical.representation.of.received.signal
3.. Antennae Icon.–.Indicates.single.peak.mode
4.. .Selected Sonde Frequency.–.Toggles.through.activated.sonde.frequencies.
2.. Bar graph –.Graphical.representation.of.received.signal
3.. Antennae Icon.–.Indicates.single.peak.mode
4.. .Selected Sonde Frequency.–.Toggles.through.activated.sonde.frequencies.
(512,.640,.or.33.k)
5.. Sonde Icon.–.Indicates.sonde.mode.vs..line.locating
6.. Battery Icon.–.Indicates.battery.level.of.receiver
7.. Signal Level.–.Numerical.reading.of.received.signal.(dB)
6.. Battery Icon.–.Indicates.battery.level.of.receiver
7.. Signal Level.–.Numerical.reading.of.received.signal.(dB)