3M 2220M 用户手册
4
Pin-Pointing the Sonde
Note: The receiver handle must be oriented perpendicular to the sonde. The
cross bar of the receiver must be in line with the sonde (the opposite of line
locating).
cross bar of the receiver must be in line with the sonde (the opposite of line
locating).
1.. .Set.the.receiver.to.Sonde.mode.by.pressing.the.Sonde.key.until.the.
frequency.of.the.sonde.appears.on.the.locate.screen.
2.. .Holding.the.receiver.perpendicular.to.the.suspected.path,.walk.the.path.until.
the.receiver.detects.the.first.peak.signal.of.the.sonde.
3.. Adjust.the.gain.down.if.the.bar.graph.closes.completely.
4.. .Continue.to.walk.the.path..Observe.the.response.of.the.receiver.as.the.center.
4.. .Continue.to.walk.the.path..Observe.the.response.of.the.receiver.as.the.center.
(and.strongest).peak.of.the.sonde’s.magnetic.field.is.detected.
5.. .Continue.past.this.strong.peak..The.signal.will.fall.and.then.rise.again.as.the.
last.weak.peak.is.detected.
6.. Retrace.your.steps,.watching.the.receiver.
7.. .The.sonde.has.been.pinpointed.when.the.center.of.the.strongest.peak.has.
7.. .The.sonde.has.been.pinpointed.when.the.center.of.the.strongest.peak.has.
been.found.
8.. .Measure.the.depth.of.the.sonde.by.placing.the.tip.of.the.receiver.on.the.
ground.and.pressing.the.depth.key..Refer.to.receiver.set.up.section.to.select.
“snapshot”.of.“live”.depth.modes.
“snapshot”.of.“live”.depth.modes.