Arizona MAX-5000XL - Manual (Page 28)

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 Some samples contain more than one volatile material, for example, nylon
resins with large amounts of unpolymerized material (Caprolactam). In
these cases, the rate will fall to some fixed value when all the moisture is
evaporated but while the monomer is still evaporating. The graphical
display available from the Main Test Screen is of great help in visualizing
these cases. The rate ending criteria, if set above the rate of monomer
volatilization, may give the best results.
 Time - This feature places a
time limit on a test. The test
will end when a selected
amount of time has passed.
 Fixed time tests are
seldom superior to the
prediction algorithm, but
can be useful when
conducting application
characterization tests, or
when investigating long
term stability of the
instrument.
 Time or Rate – This feature
is used during tests when a
change in moisture may not
occur. When the moisture
characteristics of a sample
are not known, linked tests,
with slightly higher
temperatures for each
successive test may be used.
With the “Time or Rate”
selection and linked tests
enabled, testing will continue
for the set amount of time
and then start the next test in
sequence. If a moisture loss occurs, the test will end on the rate criteria and the
next test will begin.