USER MANUAL | ICOS | INSTRUCTIONS | UM/ICOS-EN REV. B.2
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Appendix E:
Multi-Port Inlet Unit
(Optional)
The
Multiport Inlet Unit (MIU) directs samples of multiple unknown gases and multiple
reference gases through a series of inlet ports and digitally controlled valves directly into
the inlet port of the analyzer. The gas manifold control screen (Figure 84) controls which
gases are introduced into the inlet port of the analyzer in what order and for how long.
By sampling references periodically during an ongoing data run, you can post-correct the
data for long-term drift when active calibration cannot be done.
ABB-LGR offers two versions of the MIU:
8 port
16 port
Figure 84 shows the front panel of a 16 port MIU.
Figure 84: 16 Port MIU Front Panel
Control of the MIU is unidirectional. The analyzer does not receive
feedback on the MIU state. If the MIU is enabled in the analyzer
Setup
Panel, the data file is tagged with MIU valve descriptions whether or not
the MIU is properly connected. The data file simply logs the condition of
the control signal to the MIU.
