IMPACT ECHO (IE)
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3. The system is ready to acquire data. In the IE test, the initial gain will be automatically set to
100. This is a good value for most of the IE test. However, if higher gain is required, simply
press on the + button of the gain for Ch 1.
4. The system is loaded with a default parameter that is applicable for most of the IE tests.
However, if the parameters need to be adjusted, press the Param buttom. In the parameter
setup screen, the user can change the following parameters by touching the button to toggle
the value. Touch the “Back” button after the parameter setup is complete.
• Change Date/Time. This option allows the user to enter the correct date and time of testing
• Time/Point or Sampling Rate means how often (in time domain) the system will acquire data
points within a given data trace. In the case shown in the picture below, the Time/Point was set at
20 microseconds. This means the system will acquire data at 20 microsecond intervals. This
parameter can not be changed after the data was taken.
• Points Per Record is number of sampling points for each waveform. The higher this value, the
more data is acquired in each waveform. The total time of a record is affected by both the
Sample Rate and the Record Size. This parameter can not be changed after the data was taken.
• Velocity.
The software uses this velocity to calculate the thickness echo. If velocity calibration
is not possible, a typical concrete velocity of 12,000 ft/sec may be used as a default. This
parameter can be changed later in the post data analysis.
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