GE SpotChecker, Operating Manual

Page: 59 / 98

The access to program functions can be protected by
passwords. By this means it is possible to ensure for
example that inspections are only carried out accord-
ing to the required inspection plans if necessary.
The evaluation assistance tools
SpotChecker makes three different evaluation assis-
tance tools available to support the inspection accord-
ing to a maximum of six criteria. Using the algorithms
of the evaluation assistance tools, SpotChecker calcu-
lates the inspection results after coupling and A-scan
freeze. With Evaluation Assistance III, SpotChecker
compares the currently active A-scan with a collection
of model scans which are characterized with the help
of gates. Up to 20 reference scans can be
fi led for
each evaluation criterion for this purpose.
By using the evaluation assistance tools, SpotChecker
is able to carry out an automatic evaluation and to se-
lectively save the required data (e.g. only certain
fl aw
types).
A visual evaluation by the inspector is also always
possible by pressing a key.
Evaluation Assistance I
The following fi xed inspection criteria are fi led in the
program for the Evaluation Assistance I:
❚
OK
❚
Small nugget
❚
Stick weld
❚
Burnt
❚
Bad through-welding
❚
Loose
The evaluation and allocation of the inspection crite-
ria are carried out on the basis of the currently active
A-scan from the backwall echo sequence, and from
the
fl aw echoes if necessary. SpotChecker has an
empirically determined table containing typical echo
sequences for the range of 1 to 5 mm total plate thick-
ness.
Advantage: The Evaluation Assistance I provides a
simple method requiring no additional data entries by
the user. It is particularly well suited for steel alloys
(deep-drawing steel plates).
The software SpotChecker
Individual inspection reports
SpotChecker Issue 02, 03/2009
59