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Instruction Manual
748332-F
April 2003
Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-3
Model NGA2000 NDIR
Table 2-1. Cell Purging Times at Atmospheric Sample Pressure
Figure 2-2. NDIR Back Panel
CELL LENGTH
CELL VOLUME
CC
TOTAL VOLUME
CC
TIME FOR 2 VOLUMES
@ 2 SCFH (1L/MIN)
mm inch without inlet tube cell with inlet tube at 750 mm Hg
3 0.118 0.85 12 2 sec.
4 0.157 1.14 12 2 sec.
8 0.315 2.28 13 2 sec.
16 0.630 3.56 16 2 sec.
32 1.25 9.12 20 2 sec.
64 2.52 18.24 25 3 sec.
128 4.03 35.48 44 3 sec.
232 9.13 65.12 73 6 sec.
343 13.50 97.76 105 13 sec.
381 15.00 108.60 116 14 sec.
IN
10 PSI MAX
(69 kPa MAX)
OUT
SAMPLE
10 PSI MAX
(69 kPa MAX)
OUT
REFERENCE
IN
PURGE IN
15 PSI (103 kPa) MAX
Note: Reference and purge gas connections are applicable only to certain applications.
FAN