S1 TITAN, T
RACER
5, and CTX User Manual
030.0112.04.0
24 of 67
2.2.
Radiation Profile – T
RACER
5
Testing
standards
The radiation profile reflects the radiological conditions during normal and non-normal
instrument operational conditions.
To establish radiation profiles –
IEC 62495 (2011),
Nuclear instrumentation – Portable X-ray fluorescence analysis
equipment utilizing a miniature X-ray tube
was used as a guide.
The analyzer was set at three conditions established for normal analysis and two worst-
case conditions with and without a sample over the examination window. For ease in
viewing, three of the settings are shown below.
Per the guide, measurement of stray radiation (leakage and scatter) was conducted at 10,
30, and 100 centimeter distances from the surface, as well as at 5cm.
The geometric size of the X-ray beam and the open beam radiation dose equivalent rates
were recorded at 5, 10, 30, and 100cm and extrapolated back to the surface.
General
testing
conditions
Radiation measurements were conducted –
Using a Thermo RadEye B20-ER meter.
With the survey meter calibrated by the survey meter manufacturer.
Readings
The instrument stray radiation profile was collected –
Operating without a filter.
With the larger 8mm spot size collimator.
At its effective maximum power (40keV and 99uA in the appendix) and maximum voltage
(50keV and 39uA).
At distances of 5, 10, 30, and 100cm.
With and without a sample covering the opening at the nose of the instrument.
Using a duplex (3mm thick) check sample.
Operating at commonly used setting and corresponding filters for 50 (in the appendix),
40, and 15 keV.
Locations for the stray radiation profiles and results are shown in the figures and tables below,
and the appendix. Correction factors to agree with results from 80 pkV, 2.9mm Al HVL NanoDots
(TLD dosimeters) from Landauer were applied.
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