Hanna Instruments HI 904 - Manual (Page 35)

2-13
SETUP
2.3.5 Reagent, Waste Bottle Assembly
The bottle top assemblies are equipped with desiccant cartridges containing molecular sieves,
which ensures that the air passing through the reagent handling system has been dried.
The
molecular sieves have a limited capacity to absorb moisture and is typically exhausted after 3
to 5 weeks. Molecular sieves, indicating or otherwise, can be regenerated at 300°C.
The bottle tops are constructed of PTFE and have been designed to accommodate reagent
bottles with GL-45 type threaded tops.
The waste and reagent bottle top assemblies include blue PTFE tubing for the handling of
liquid Karl Fischer reagent and a clear flexible silicone based tubing for use with the air
pump.
Caution: Most Karl Fischer reagents give off harmful
vapors. Consult manufacturer’s MSDS for safe handling
guidelines.
To assemble the reagent or waste bottle, see Figure 6 and
follow the next steps:
• Insert a PTFE top (J) into a GL45 cap (E).
• Screw on the desiccant cap with hose barb (F).
• Insert a desiccant cartridge (B) with hose-barbed cap
(A) through a 10-mm fitting (F) and 10-mm o-ring (G).
• Insert and screw the desiccant fitting into the corresponding
hole. Fasten the desiccant cartridge assembly to PTFE
top (J) with 10-mm fitting (F).
• Insert the reagent / waste tube (D) in the 5-mm fitting
(H) and attach the o-ring (I).
• Insert and screw the tube fitting into the corresponding
hole.
• Screw GL45 (E) cap with full assembly onto reagent
bottle.
• Add the air tube (C) to the desiccant cap (A) and connect
it to the corresponding position on the air pump. The
“Fill” position connects to the reagent bottle assembly.
The “Empty” position connects to the waste bottle
assembly.
Figure 6