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Hi, I’m Andrew Cardamone.

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Today I’m going to talk to you
about what it means

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when you get no match
during your alloy testing

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using the Vanta XRF analyzer.

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I will also discuss how to obtain

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the appropriate grade
match for your sample.

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In today’s example I’ll be analyzing
a nickel alloy, MonelK500.

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As you can see,
no grade to compare

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has appeared across
the top of the screen.

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Let’s take a look at the chemistry

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to better understand what
might be going on here.

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We are clearly analyzing
a nickel alloy,

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so why didn’t we get a match?

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The most common reason for no match
to occur is sample contamination.

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This can happen when a sample
is painted, plated or coated.

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Since we’re working with a
known alloy standard however,

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contamination doesn’t
seem to be our issue.

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Although it’s far less common,

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the sample not being included
in the grade library

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can also cause no match to occur.

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To check if this is the case
open the grade match icon.

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Scroll down to the libraries.

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Select the library,
and open the list.

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We can see here that
MonelK500 is indeed

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included in our active library.

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So we’ve ruled out contamination

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and our sample is
in the active library.

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So what else can we do
to get a match?

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Lets go back
to the grade match page.

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You’ll notice across
the top that it says

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show match number less than 4.

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The match number is an
indication of how closely

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the chemistry of
your sample matches

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the chemistry specified
in the grade library.

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A value of 1 indicates
a very good match

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whereas a value of 10
indicates a poor match.

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Let’s increase our value to 6

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and re-test our sample.

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You can see now that
we’ve successfully

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identified the material
as MonelK500.

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You’ll also notice that
below the sample name

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there’s a small value of 5.0.

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That is the match number.

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Since we previously specified
the match number

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had to be less than 4,
we obtained no match.

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Now that we’ve increased
our match number to 6,

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we are able to obtain a match.

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In our case, since we are comparing

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our sample to a single alloy grade,

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we are able to refine
the search even further.

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To do that, once again open
the grade match icon.

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Scroll down to the
grade compare and select.

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Right now the Vanta is
set up with Best Match.

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What this does is it
compares our sample

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with all the grades
in the grade library,

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and finds the best match
within that grade library.

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To further refine this
we can hit selected grade

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and then choose
our sample, MonelK500.

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By doing so the Vanta will
now compare our sample

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to just the specifications
for MonelK500.

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Lets re-test our sample.

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Looking at the chemistry
we can see that

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nickel and copper are outlined in red.

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This outline indicates
that they are outside

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the specification range
for MonelK500.

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This is why we initially
obtained no match,

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our sample is out of spec.

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The red outline allows
you to quickly see

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which elements are causing
your sample to fall out of spec,

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and to make any process changes

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that need to be made to correct this.

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You may also notice during testing

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that initially a match is shown,

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but then as the test finishes,
no match appears.

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This occurs because as the
precision decreases over time,

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and the amount outside of
the specification increases,

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we penalize the match number more,

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and that results in
no match being displayed.

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I hope explaining what no match means

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has been useful for
your alloy testing.

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Thank you for watching.