Methods Of Operation - Thermo Scientific XL2 User Manual

8
Advanced Settings
Safety Settings

Methods of Operation

186 Niton XL2 Analyzer User's Guide
CAUTION After being powered on, your Niton Analyzer will perform an internal
re-calibration before an analysis is initiated. It is recommended that you let your analyzer
warm up for ten minutes after start up, before testing is begun.
There are six different methods of operation for taking a sample measurement, and your
analyzer will be configured to use one of those methods for alloy samples, depending on the
regulatory requirements of your locality. These methods are:
• Trigger-Only method. With the Trigger-Only method, you only need to place the
measurement window flush with the sample to be analyzed and pull the trigger for sample
analysis to be initiated.
• Trigger-and-Proximity-Sensor method. With the Trigger-and-Proximity-Sensor method,
you must place the measurement window against the sample to be analyzed to engage the
proximity sensor on the front of the analyzer, then pull the trigger for sample analysis to
be initiated.
• Momentary-Trigger-Touch-and-Proximity-Sensor method. With the
Momentary-Trigger-Touch-and-Proximity-Sensor method, you must place the
measurement window against the surface to be analyzed to engage the proximity sensor
on the front of the analyzer, then pull the trigger. The trigger may be released and the
reading will continue until you release the proximity button, or other criteria (such as
Max Time) are reached.
• Trigger-and-Interlock method. With the Trigger-and-Interlock method, you need to
place the measurement window close to the sample to be analyzed, press and keep
pressing the interlock button at the rear of the analyzer with your free hand, then pull the
trigger for sample analysis to be initiated.
• Trigger-Interlock-and-Proximity-Sensor method. With the
Trigger-Interlock-and-Proximity-Sensor method, you must place the measurement
window against the sample to be analyzed to engage the proximity sensor on the front of
the analyzer, press and keep pressing the interlock button at the rear of the analyzer with
your free hand, then pull the trigger for sample analysis to be initiated.
• Easy Trigger method. With the Easy trigger method, you need only place the
measurement window against the sample area and pull the trigger once to initiate a
sample analysis. Your analyzer will continuously sample the backscatter, using a complex
internal algorithm, to determine if the measurement window is against a sample or
pointing to the empty air. If it finds that there is no sample directly against the
measurement window, the analyzer will stop directing radiation through the window as
soon as this determination is made.
The analyzer is constantly checking the backscatter characteristics to determine if a sample is
against the measurement window, whether or not the Easy Trigger method is being used, and
will shut off any radiation directed through the window if it determines that there is no
sample present.
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