How Sequential Testing Works - Ametek mocon OX-TRAN 2/12 R Operator's Manual

Theory of Operation
The Convergence algorithm makes an Equilibrium Determination based on the absolute-magnitude-of or
the magnitude-of-change-in the transmission rate. If the absolute magnitude of the transmission rate is less
than the noise floor of the instrument, the sample is declared to be at equilibrium. Above the noise floor the
acquired Cell Examination data is used to calculate two variables. These variables are calculated using data
sets representing different time frames. These variables represent the "Current" transmission rate and the
"Historical" transmission rate. When the difference in the value of these variables is less than 1%, the
sample is declared to be at equilibrium.
The absolute magnitude of the measured transmission rate is used to determine if an Individual Zero Phase
will be performed during the test. The performance of the Individual Zero Phase is optimized in the same
manner as used for the Test Phase. When included, the Individual Zero Phase will always be performed
after the Test Phase.
Completed Auto-Test Methods will contain a log showing the changes in the dynamically assigned test
parameters in addition to the normal Cell Examination data.

How Sequential Testing Works

The Sequential Test function allows a sequence of tests to be performed on the same sample (at different
test conditions) without user intervention. The specific tests performed, are determined by the contents of
the Sequential Test Parameters table. The Sequential Test function is an Advanced Test Method property.
The Sequential Test Parameters table is used to specify the Test Temperature, Test Gas RH and Carrier
Gas RH for each test to be performed. Tests are executed in the order they are placed in the Sequential
Test table. A maximum of ten sequences can be added to the table.
The criteria for the completion of all the tests in the table, is determined by setting of the "Test Mode"
parameter. If the "Test Mode" parameter is set to "Continuous" manual user intervention will be required to
Advance each test to the "Complete" state.
The Advance and Abort controls can be used to control the execution of each test and the overall
sequence. Aborting a test in the sequence terminates the remainder of the sequence. A fatal error in any
test in the sequence terminates the remainder of the sequence.
The "Auto Print", "Auto Save" and "Auto Export" functions can be used to create reports and save the
results for each test as it is completed.
Note: It may be possible to reduce the total time required to execute the entire sequence by specifying the
variable test conditions in numerical order. For example the lowest temperature first and the highest
temperature last.
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OX-TRAN Model 2/12 R Operator's Manual
Revision L MOCON, Inc.