Thermo Scientific NITON XL3t 500 User Manual page 38

Standard Soil Mode
Standard Soil Mode
1-24 NITON XL3 Analyzer User's Guide
specific calibration standards. This mode is used chiefly for the analysis of
contaminants in soils.
NITON provides three soil standards: Lead high, Lead medium, and Lead
low, to check the calibration of the instrument when testing in Standard
Soil Mode.
Note Although the standards do not contain every element that the
Environmental Analyzer is capable of testing, when an instrument correctly
measures the standards you have received with your instrument, your
instrument will correctly measure all other elements.
Test the standards regularly. NITON recommends testing immediately after
the instrument finishes self-calibration. Test the standard samples
appropriate to the type of tests you are conducting, and once every 1–2
hours thereafter.
Note For defensible Quality Control, keep a record of the time and
precision of every calibration.
WARNING! Tampering with the 5,500 ppm (lead high) lead-in-soil
standard may cause exposure to lead dust. Keep all standards out of the
reach of children.
CAUTION Never tamper with Test Standards. They should not be used
unless they are completely intact.
During each test, the instrument looks at the full range of x-ray spectrum
and continuously corrects for cross-element interference.
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