Hach-Lange Sigma SD900 Portable - Manual (Page 65)

63
Maintenance
Procedure:
1. Unscrew and remove the desiccant holder from the controller
( Figure 26 ).
2. Remove the plug from the end of the desiccant tube ( Figure 27 )
and discard the spent desiccant.
3. Fill the desiccant tube with fresh desiccant.
Note: Fresh desiccant should be yellow.
4. Replace the plug.
5. Apply grease to the O-ring ( Figure 27 ).
6. Replace the desiccant tube in the controller.
Figure 26 Side view of controller—pump and desiccant
1 Desiccant window 2 Peristaltic pump
Figure 27 Desiccant holder
1 Plug 3 O-ring
2 Desiccant tube