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USER MANUAL | ICOS | INSTRUCTIONS | UM/ICOS-EN REV. B.2
Plumbing Diagram
The plumbing diagram measures the internal flow of gas through the analyzers.
The external pump draws gas through the Sample Inlet port (
" Swagelok) on the back
1
/
4
panel of the analyzer, and the waste is exhausted through the To External Pump port (3/8"
Swagelok). The inlet gas pressure range is 0 to 5 psig.
Figure 6 shows the plumbing diagram.
Figure 6: Plumbing Diagram
If the analyzer flow is greater than 200sccm, it must be restricted with an orifice, which is
connected in between the pump and the Pretreatment Box. (Figure 7) The provided 450um
orifice will throttle the analyzer flow to less than 180 sccm. This is primarily used to switch
between the External Dynamic Dilution System (EDDS) and Batch Mode Operation.
Refer to Appendix E: on page 94 for External Dynamic Dilution System (EDDS) details.
Refer to Appendix F: on page 99 for Batch Mode Operation.
Figure 7: Orifice for decreasing analyzer flow
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