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USER MANUAL | ICOS | INSTRUCTIONS | UM/ICOS-EN REV. B.2
DCS Tab (Optional)
The External Dynamic Dilution System (EDDS), formally known as DCS, is an optional
accessory.
The EDDS is an ABB accessory that dilutes sample gas with zero-air whenever the
concentration rises above the target. It extends the upper range up to 100x through
automated dilution and maintains the target concentration at that level.
The EDDS can be enabled/disabled using the radio buttons; and the dilution factor can be
set using the drop-down selection box on the DCS screen. (Figure 42)
See the External Dynamic Dilution System (EDDS) Appendix on page 94 for detailed
instructions on enabling and controlling the EDDS.
Figure 42: DCS Screen for the EDDS
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