Honeywell CM4, Technical Handbook

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CM4 Four-Point Continuous Monitor
CM4 Technical Manual A-2
A.1 Introduction
Appendix A contains:
• End of line sample filter compatibility
• CM4 general specifications
• Sample transport times
A.2 Filter Compatibility
The following table shows sample filter requirements.
If you are monitoring non-corrosive target gases, use filter type A,
(P/N 780248), a sample line dust/particulate filter.
For monitoring corrosive gases, such as chlorine (Cl
2
), hydrogen
fluoride (HF), hydrogen chloride (HCl), and hydrogen bromide (HBr),
sample lines in a dusty environment or for outdoors, use filter type
B, (P/N 1830-0055), or type C, (P/N 1991-0147) filter assembly for
corrosive gases. The Teflon membrane particulate filter is designed to
prevent dust and dirt greater than one micron from entering the sample
line. Unlike standard particulate filters, it does not exhibit sample loss
with corrosive monitoring.
The one micron Teflon membrane contained in the filter housing (P/N
0235-1072, 100 per pack) should be replaced every 30 days.
Filters have an arrow on the side of the filter pointing in the direction
of airflow toward the CM4 system.
Filter Part Number Recommended Replacement
A
780248
3-6 Months
B
1830-0055
Filter membrane 0235-1072 monthly
C
1991-0147
3-6 Months
Symbol Name
Filter
Type A
Filter
Type B
Filter
Type C
AsH
3
Arsine X
PH
3
Phosphine X
B
2
H
6
Diborane X
SiH
4
Silane X
GeH
4
Germane X
TBA Tert-butyl Arsine X
TBP Tert-butyl Phosphine X
Cl
2
Chlorine X X
NO
2
Nitrogen Dioxide X
ClO
2
Chlorine Dioxide X X
Cl
2
LL Chlorine (Low Level) X X
HCl Hydrogen Chloride X X
HCl LL Hydrogen Chloride (Low Level) X X
HF Hydrogen Fluoride X X
HF LL Hydrogen Fluoride (Low Level) X X
HBr Hydrogen Bromide X X
HBr LL Hydrogen Bromide (Low Level) X X
MMH Monomethyl Hydrazine X X
NH
3
Ammonia X X
COCl
2
Phosgene X
N
2
H
4
Hydrazine X X
H
2
S Hydrogen Sulfide X
HCN Hydrogen Cyanide X
H
2
S LL Hydrogen Sulfide (Low Level) X X
COCl
2
High Phosgene High X
TEA Triethyl Amine X X
Table A-1: Recommended Use of Sample Filter (cont’d)
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