USER MANUAL | ICOS | INSTRUCTIONS | UM/ICOS-EN REV. B.2
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Fast and Slow Flow Pump Options
The analyzer comes equipped with an internal pump. However, the optional external pump
provides the ability to achieve up to 10 Hz flow response.
In fast-flow mode, you must connect a compatible external pump to the analyzer. Table 5
describes the compatible pump options.
Flow-through times of the available external pumps:
ACC DP3H pump: provides flow-through (1/e) time = 1.2 seconds
ACC DP4H pump: provides flow-through (1/e) time = 0.7 seconds
Dry Scroll pump: provides flow-through (1/e) time = 0.1 seconds
Table 5 describes the compatible pump options.
Table 5: Pump Options
Modes of Operation
Internal
N920
N940
XDS-35
Remarks
Standard Mode
X
X
Fast Flow Mode
X
X
X
X
See Appendix F
See the
Fast Flow Operation Appendix on page 100 for detailed instructions on fast-flow
mode.