16
Emitter
Receiver
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.
