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Contact (Stethoscope)Module
Stethoscope Module
This is the module with the metal rod. This rod is utilized as a "waveguide" in that it is sensitive to
ultrasound
that is generated internally such as within a pipe, bearing housing, steam trap or wall. Once
stimulated by ultrasound, it transfers the signal to a piezoelectric transducer located directly in the module
housing. This module is shielded to provide protection from stray
RF waves that have a tendency to effect
electronic receiving. This module can be effectively utilized in practically any environment ranging from
airports to broadcasting towers. It is equipped with low noise amplification to allow for a clear, intelligible
signal to be received and interpreted.
To use :
1. Align the pins located at the rear of the module with the three jacks in the front end of the Metered
Pistol Housing (MPH) and plug in.
2. For detecting leaks in valves, steam traps, etc., position the meter selection dial to LOG. If
performing mechanical analysis, bearing monitoring, etc., select the LIN mode on the meter
selection dial.
3. For general use, position the frequency selection dial to "Fixed-Band". For problem solving, i.e.
finding a problem sound (refer to section on Mechanical Analysis).
4. Touch test area.
5. As with the scanning module, go from the "gross" to the "fine". Start a maximum sensitivity on the
Sensitivity Selection dial and proceed to reduce the sensitivity until a satisfactory sound and meter
level is achieved.
Stethoscope Module At times it may be necessary to utilize the stethoscope probe with the sensitivity level
at or near maximum. Occasionally when in this situation stray ultrasound may interfere with clear reception
and be confusing. If this occurs, place the RUBBER FOCUSING PROBE over the Stethoscope probe to
insulate against the stray ultrasound.
Stethoscope Extension Kit
This consists of three metal rods that will enable a user to reach up to 78 cm (31 additional inches) with
the Stethoscope Probe. To use:
1. Remove the Stethoscope Module from the Metered Pistol Housing.
2. Unscrew the metal rod in the Stethoscope Module.
3. Look at the thread of the rod you just unscrewed and locate a rod in the kit that has the same size
thread - this is the "base piece".
4. Screw the Base Piece into the Stethoscope Module.
5. If all 78 cm are to be utilized, locate the middle piece. (This is the rod with a female fitting at one
end)and screw this piece into the base piece.
6. Screw third "end piece" into middle piece. If a shorter length is desired, omit step 5 and screw "end
piece" into "base piece".
