Perma Pure Mini-GASS - Manual (Page 14)

14
Mini-GASS User Manual | Original Instructions
PERMA PURE LLC
Mini-GASS™ User’s Manual
Doc. #212: Revision: 00A
Page 14 of 32
System fine tuning
Temperature adjustment
Steam heated systems
Steam control valve is factory set to 180° F and is normally not field adjustable.
This temperature is adequate for most applications in which sample gas water
content is not in excess of 50% water vapor by volume. Consult factory if
condensation in sample tubing is detected.
Electrically heated systems
1. Check that no condensate is present in sample line between filter and dryer.
2. If water droplets are visible, increase temperature of filter/dryer compartment by
5° C.
3. Allow about ½ hour for system to stabilize and then check again for condensate.
4. If necessary, continue to increase temperature in 5° C increments until
condensate is no longer visible. Do not exceed 100° C! Maximum system
temperature is 100° C. Operation above this temperature can cause damage to
Nafion dryer. It is essential that purge gas flows continuously and
setpoint temperature is not above 100° C to prevent damage to dryer.
Maintenance
Filters
If system is fitted with a pre-filter, it should be checked regularly to ensure that the element
is in good condition. If element appears to be dirty or begins to cause flow restriction in
system, it should be replaced.
Filter Element Replacement
(Refer to Figure 7)
1. Loosen bolt on bottom of filter.
2. Gently pull apart assembly and remove old element.
3. Place new element into grooves in top and bottom of housing.
4. When re-assembling, inspect for o-rings on top and bottom caps and on center bolt.
5. Install glass shell onto bottom piece.