Tracer TP-9367 Marksman II AM12002 - Manual (Page 9)

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3. Press the power button to turn the unit on. The Marksman II will
turn on at maximum sensitivity. The instrument will not beep or
tick in an idle state but the battery LED will illuminate to indicate
that the detector has adequate power. When the battery
LED flashes, this indicates that the batteries are nearing the
end of their useful life and will soon need to be replaced.
Please note: Increasing the volume does not increase the
unit’s detection sensitivity. Setting the volume control too high
can lead to operator fatigue.
4. Point the Marksman II in the direction of the suspected leak or
defect and scan the area by making a slow “X” (a vertical and
horizontal type sweeping motion) while keeping the probe
pointed in the general direction of the suspected leak or defect.
5. The Marksman II will beep when it detects an ultrasonic
disturbance. (When the headphones are plugged in, the unit
will not beep. See Heterodyne Feature on page 10.) To isolate
the ultrasonic disturbance, gradually decrease sensitivity by
slowly dragging your finger down the touch pad until the
beeping stops. The sensitivity level will be indicated briefly by
the number of illuminated LEDs next to the touch pad.
6. Move closer to the suspected leak or defect, continuing the
sweeping pattern and narrowing the range of the sweep by
smaller patterns until the ticking once again increases. This will
lead to the location of the ultrasonic disturbance. If an exact
location is desired, attach the flexible rubber extension to the
probe and repeat step 5.
7. Repair all leaks or defects as located and repeat the scan.