Instruction Manual

748332-F April 2003

Model NGA2000 NDIR

4-13 CELL DESICCANT

The reference cell may use a flowing reference. If so, desiccant is required. A desiccant holder is used on the inlet and

outlets to keep moisture from entering the reference cell (see Figure 4-7 on page 4-7). The desiccant should be replaced each time the cell is opened, refer to Table 4-1 below. Before inserting desiccant, purge cell with dry inert gas (i.e., N2).

GAS

DESICCANT

PART NUMBER

CO2

Cardoxide

 

096218

CO

Mg (C104)2

 

096217

H20

Mg (C104)2

 

096217

SOS

Mg (C104)2

 

096217

CH4

Mg (C104)2

 

096217

Hexane

Mg (C104)2

 

096217

CO + CO2

Cardoxide + Mg (C104)2

096217/096218

 

Table 4-1.

Cell Desiccant

 

4-10 Maintenance and Troubleshooting

Rosemount Analytical Inc. A Division of Emerson Process Management