OM_SPHM_engl_Vers.1_2011-09-26
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3 Function description
3.1 General
information
Ultrasound is generated due to friction caused by the flow of gases,
liquids and solids in pipes and leakages. These ultrasonic signals are
recorded by the SONAPHONE M, their intensity is shown on the display
screen and made audible through speakers or headphones. As an
option, surface temperatures can be measured with a temperature
sensor. The recorded data can be stored and transmitted to a personal
computer using the integrated USB interface. Ultrasound can be
generated in a wide variety of processes, for example:
• at leaks in compressed air-, steam- and vacuum systems
• at steam traps
• at leaky valves, gate valves, shut-offs and valves in piping
• from roller bearing damages
• from cavitation at pumps and compressors
• from flashovers and corona discharges on electrical installations
Using the SONAPHONE M, it is possible to locate precisely the defects
and estimate their magnitude. The ultrasonic transmitter
SONAPHONE T can be used to detect leaks in vehicles, freight
containers, other types of containers and ventilation technique systems
where no ultrasound is generated. The SONAPHONE T (optional)
generates ultrasonic waves which emerge at the leaks. Precise location
is carried out from the outside with the SONAPHONE M.
The SONAPHONE M tester is a mobile hand-held and battery-supplied
unit. Various probes, which are connected directly or via a cable to the
tester, serve to detect the ultrasound. The type of probe is automatically
recognised by the SONAPHONE M by means of a probe code. A
temperature sensor (optional; type K thermocouple, NiCr-Ni) with a
circular plug-in connector is used for temperature readings. It can be
extended at any time using a corresponding extension cable.
