Thermo Scientific NITON XL3t 500, User Manual

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The Measurement Screen
Thermo Scientific NITON XL3 Analyzer User’s Guide 1-25
The Measurement
Screen
Figure 1-2. The Standard Bulk Measurement Screen
At the top are the elements detected in the sample, and underneath this,
elements that are below the detection limit.
Use the 4 way touch pad or touch screen to scroll through the elements.
Detection Limit For an element to be detected by your analyzer in a given sample, the
measured concentration of the sample must be at least three times the
standard deviation of the measurement. This detection limit will depend on
the composition of the sample.
Precision The measurement precision for each element displayed appears to the right
of the measured concentration, under the heading “
+- “. The precision of
each measurement is two times the standard deviation (sigma).
An element is classified as “detected” if the measured concentration (in
ppm) is at least 1.5 times the precision. Detected elements are displayed in
ppm, followed by the measurement precision. Non-detected elements are
shown as
< the detection limit for that sample. The detection limit for a
given element varies depending on the other elements in the matrix.
Element
Column
NAV Menu
Two Sigma
Confidence
Column
Mode
Nominal Seconds
Test Duration Line
Reading Number
Tools Menu Tools Menu Tools Menu Tools Menu
Battery Life
Indicator
Measured
Concentration