TRACER PRODUCTS MARKSMAN II TP-9367L Guide De L'utilisateur page 16

gas exiting a hole or orifice under a differential pressure. It is
independent of the type of gas or fluid in the system. The
Marksman II will readily detect air and vacuum leaks typically
caused by bad gaskets, worn valve seats and cracks in pipes,
hoses or fittings.
Non-Pressurized Leaks
Non-pressurized vessels or containers cannot generate ultrasonic
sounds. The ultrasonic emitter (if equipped) is used to broadcast
an ultrasonic noise, which is optimized to the frequency response
of the Marksman II receiver. Some examples are leaks in heating
and cooling system ducts and pipes, tanks, windshields, weather-
stripping and whole house integrity.
1. Turn on the emitter and place it in the enclosed environment to
be evaluated. The emitter will
fill the interior with a piercing
warble sound. Note: Since
the output is in the ultrasonic
range, you will not hear it
without the receiver.
2. Walk around the exterior of
the enclosed environment
while sweeping the receiver
around the suspect areas.
Compromised areas will be
revealed by a change in tone and intensity, both audibly and
visually, by listening and watching the changes on the LED
display.
Using the LED Display to Locate Leaks
Please note that the volume control is independent of the LED
display during an inspection. Depending on the amount of
ultrasonic signature being detected, you can use both the level of
intensity on the LED display and the audible amount of sound
through the headphones. As you get closer to the leak or defect,
decrease the volume. As the sound gets louder, repeat the
process until you have pinpointed the location.
Emitter
16
Receiver