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3 Installation
Figure 3-8: Gas Connections to the Basic Unit
There are no gas control valves inside the main chassis. A sample
system must be provided for introduction of zero and span gas, as well as
sample gas, into the sample path, and for controlling the flowrates through
the sample and reference paths of the analyzer.
If you have purchased a gas selector panel from Analytical Instru-
ments, the drawings at the back of this manual will contain a dimension
drawing, with the modified cutout and hole pattern for mounting, and a
drawing and/or addendum showing the gas connections. Figure 3-9 is an
example showing a manual-valve panel with three valves (for sample, span
and zero gases) and two flowmeters (one for reference and one for sample,
span and zero gases).
3-12
Teledyne Analytical Instruments
Model 2020
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