EC155 CO
2
and H
2
O Closed-Path Gas Analyzer
36
flow gets directed to the bypass, 6 LPM flow goes to the sample cell, and the
differential pressure output reads between
−
8 and –6 kPa. As the filter becomes
clogged (typically, this takes many months), the bypass flow will be reduced,
which will lead to a lower differential pressure since the pump must work
harder to maintain the same total flow. Also, the sample air will begin to carry
more particulates that can build up in the sample cell, causing the CO
2
and H
2
O
signal strengths to decrease. When either signal strength falls below 0.8, the
following maintenance should be performed:
•
Replace vortex filter
•
Clean bypass tubing and vortex chamber
•
Clean analyzer windows and internal sample cell
The sections below provide instructions on performing these maintenance
items, except for cleaning the analyzer windows and internal sample cell,
(p. 40)
.
9.2.1.1 Replace Vortex Filter
Follow these steps to replace the vortex filter.
1.
Power down the pump and allow a moment for pressure to equilibrate
inside the analyzer.
2.
Loosen the 1/4-in Swagelok nuts that secure the blue bypass filter in place.
Remove and discard the used filter assembly and install a new filter
assembly.
Do not over-tighten the Swagelok nuts, as this could introduce
leaks. For more information on tightening Swagelok fittings, see
Appendix H, Swagelok Fittings, in the AP200 CO2/H2O
Atmospheric Profile System manual available at
https://s.campbellsci.com/documents/us/manuals/ap200.pdf
The filter assembly comes with new ¼ inch Swagelok nuts and is
shown in FIGURE
. It may be ordered from Campbell
Scientific. Users could also provide their own filters, but the pore
size should be small enough to keep particulates from reaching the
pump (for example, 25 µm).
FIGURE 9-1. The vortex filter assembly includes a 25 µm particulate
filter with 1/4-in Swagelok nuts on either side.
CAUTION
NOTE
Содержание EC155
Страница 78: ...E 1 Appendix E Safety Data Sheets SDS E 1 Molecular Sieve Type 13X ...
Страница 79: ...Appendix E Safety Data Sheets SDS E 2 ...
Страница 80: ...Appendix E Safety Data Sheets SDS E 3 ...
Страница 81: ...Appendix E Safety Data Sheets SDS E 4 ...
Страница 82: ...Appendix E Safety Data Sheets SDS E 5 E 2 Magnesium Perchlorate ...
Страница 83: ...Appendix E Safety Data Sheets SDS E 6 ...
Страница 84: ...Appendix E Safety Data Sheets SDS E 7 ...
Страница 85: ...Appendix E Safety Data Sheets SDS E 8 ...
Страница 86: ...Appendix E Safety Data Sheets SDS E 9 ...
Страница 87: ...Appendix E Safety Data Sheets SDS E 10 ...
Страница 88: ...Appendix E Safety Data Sheets SDS E 11 ...
Страница 89: ...Appendix E Safety Data Sheets SDS E 12 E 3 Decarbite ...
Страница 90: ...Appendix E Safety Data Sheets SDS E 13 ...
Страница 91: ...Appendix E Safety Data Sheets SDS E 14 ...
Страница 92: ...Appendix E Safety Data Sheets SDS E 15 ...
Страница 93: ...F 1 Appendix F EC155 Packing Information ...
