Checkline TI-UMX2 - Manual (Page 21)

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Thin materials
Use pulse echo mode and a high frequency transducer for these types of
applications.฀The฀most฀common฀transducers฀are฀the฀7.5MHz฀and฀10MHz฀models฀
with extra resolution. The higher frequencies provide greater resolution and a lower
minimum thickness rating overall.
High temperature
฀ Use฀and฀select฀a฀special฀2.25MHz฀and฀5฀MHz฀High฀temperature฀transducer฀for฀these฀
types of applications. Both pulse-echo and echo-echo modes will also work for these
applications.฀However,฀echo-echo฀mode฀will฀eliminate฀error฀caused฀by฀temperature฀
variations in the delay line of the transducer.
Noisy Material
Materials such as titanium, stainless steel, and aluminum may have inherent surface
noise issues. This is a signal that appears at the surface of the material when using
a dual element delay line probe. Select a higher frequency transducer to reduce this
noise฀–฀7.5MHz฀and฀higher฀for฀better฀resolution.
Restricted access
Measuring materials with extreme curvatures or restricted access, higher frequencies
with฀smaller฀diameters฀should฀be฀considered.฀The฀smallest฀diameter฀uses฀3/16”฀
crystals with a contact area of .250”. Custom transducers are available on request.
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Sequential File Formats
IMPorTanT noTe: For the duration of this chapter, all references to GRIDS and
SEQ LOGS should be considered synonymous with references to FILES.
11.2 Create New Log Field Deinitions
Coordinates or Start & Stop ID’s
GrId: A grid is defined by using coordinates to define the Top Left and the Bottom
Right฀corners฀of฀the฀grid.฀Alpha฀coordinates฀are฀horizontal฀across฀the฀top,฀and฀
numeric coordinates are vertical down the side. Therefore, to define the top left
corner of the grid, there will be an (X,Y) coordinate. Where X is an alpha column
location across the top and Y is a numeric row location down the side. Use the same
logic when choosing the lower right corner. An individual grid can be up to 999 rows
and 52 columns. If the user attempts to create a grid that is larger than the stated
boundaries, an error message box “OUT OF MEMORY“ will be displayed.
seQuenTIal: The sequential file format can be viewed as a file as a single
column of up to 512 possible rows (readings), and a column of corresponding
identifiers associated with each individual reading. The identifier can be a
combination of up to 10 numeric, alpha, or special characters listed above, while the
file name can consist of a combination of up to 20 of the same character set. Note:
The identifier cannot start or end with a special character. Once a start and end ID
are entered into the TI-UMX2 and the log created, the TI-UMX2 will automatically
generate all the identifiers within that range. If the user attempts to create a grid that
is larger than the stated boundaries, an error message box “OUT OF MEMORY“
will be displayed.