Vacuum Equipment; Helium Or Nitrogen Supply; Gas Supply For X-Ray Flow Counter - Bruker S8 TIGER Manual De Instrucciones

S8 TIGER X-ray Spectrometer

Vacuum Equipment

If the supplied air filter for the vacuum pump is not used, an outdoor vent opening should be provided
for the pump's exhaust gases.

Helium or Nitrogen Supply

A helium or nitrogen cylinder with a dual pressure regulator (e.g. 200 bar / 5 bar or 3000 PSI / 75 PSI)
must be provided for the S8 TIGER with gas flushing system (this is the case if liquid or loose powder
samples are used). We recommend a dual pressure regulator with a two-stage reduction valve, for
example part no. C79298-A3228-C11. We recommend using a compressed-gas cylinder with 50 l (13
gallons) contents and 200 bar (3000 PSI) filling pressure. The cylinder must be supported to prevent it
from falling over. Observe your local safety regulations and work codes. Set the secondary regulator
pressure (outlet pressure) to 2 bar (30 PSI). This is now the inlet pressure for your S8 TIGER. We also
recommend using helium grade 4.6 (He purity of 99.996%).
Medium
Helium or nitrogen

Gas Supply for X-ray Flow Counter

A gas cylinder with pressure regulator must be provided for the flow counter detector's gas supply. If
possible, you should also plan a location for a spare cylinder.
The tubing from the gas cylinder to the spectrometer should be made as short as possible. For short
distances, Viton hoses should be used. However, if the gas supply must be placed far from the S8
TIGER, copper or stainless steel tubing should be used up to the vicinity of the spectrometer. The
tubing must be clean and free of oil, water, and solvents, and must not contain any solids such as
scale or sand. The gas lines must not be placed near heat sources such as radiators. Measurements
with gaseous detectors are degraded by variations in gas temperature.
In order to stabilize gas flow, a fine regulator for test gases should be provided downstream from the
main pressure regulator (200bar/600mbar or 3000 PSI/ 9 PSI). Bruker AXS offers a suitable dual
pressure regulator for this purpose (order number C79298-A3228-B1). The regulator outlet pressure,
DOC-M80-ZXX031 V4 – 02.2010
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