Teledyne 6200T - Sulfides Analyzer - Manual (Page 72)

Getting Started Model 6200T Total Sulfur Analyzer
Teledyne Analytical Instruments 72
3.3.2.9. Pneumatic Layout with CO
2
Sensor Option
Figure 3-22 shows the internal, pneumatic connections for the analyzer with the carbon
dioxide (CO
2
) sensor option installed. Pneumatically, the CO
2
sensor is placed in line
with the sample gas line between the particulate filter and the analyzer’s sample
chamber. It does not alter the gas flow rate of the sample through the analyzer.
Figure 3-22: Pneumatic Layout with CO
2
Sensor
3.3.2.10. About Zero Air and Calibration (Span) Gases
Zero air and span gas are required for accurate calibration.
There are two charcoal scrubbers in the analyzer chassis of the 6200T. The scrubber
canister on the outside of the rear panel of the analyzer is a standard charcoal scrubber
that supplies zero air for the diluter assembly. The second scrubber is located inside the
analyzer behind the sample filter. This scrubber uses a specially impregnated charcoal
(TAI Part# CH_52) which is especially effective in scrubbing TS gases. This filter is
used to scrub TS from the inlet sample gas for use in zero calibrating the analyzer.
Zero Air
A gas that is similar in chemical composition to the earth’s atmosphere but without the
gas being measured by the analyzer, in this case SO
2
. If your analyzer is equipped with
an Internal Zero Span (IZS) or an external zero air scrubber option, it is capable of
creating zero air.