SS2000 Operator’s Manual
H
2
S in Natural Gas A–3
3. Remove dust and other large particles of debris using a bulb blower
or dry compressed air/nitrogen. Pressurized gas duster products are
not recommended as the propellent may deposit liquid droplets onto
the optic surface.
4. Put on clean acetone-impenetrable gloves.
5. Double fold a clean sheet of lens tissue and clamp near and along
the fold with the hemostats or fingers to form a “brush.”
6. Place a few drops of acetone onto the fold and shake off the excess.
7. With gentle, uniform pressure, wipe the mirror from one edge to the
other with the wet “brush” only once and only in one direction to
remove the contamination. Discard the tissue.
8. Repeat with a clean sheet of lens tissue to remove the streak left by
the first wipe. Repeat, if necessary, until there is no visible
contamination on the mirror.
9. Carefully replace the mirror assembly onto the cell in the same
orientation as previously marked.
Excessive Sampling Gas Temperatures and
Pressures
The embedded software is designed to produce accurate measurements only
within the allowable operating range [0.7 to 1.7 bar (10 to 25 psig) and –20 to
+50 °C (4 to 122 °F)]. Pressures and temperatures outside these ranges will
trigger a Pressure too Low, Pressure too High, Temperature too Low, or
Temperature too High fault.
Electrical Noise
High levels of electrical noise can interfere with laser operation and cause it to
become unstable. Always connect the analyzer to a properly grounded power
source.
Never rub an optical surface, especially with dry tissues, as this
can mar or scratch the coated surface.
If the pressure, temperature, or any other readings on the LCD
appear suspect, they should be checked against the specifications
(see Table B-1 on page B–1).
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