Replacing The Alumina In The Oil Vapor Traps - Micromeritics ASAP 2020 Confirm Operator's Manual

ASAP 2020 Confirm

Replacing the Alumina in the Oil Vapor Traps

The activated alumina in the oil vapor traps becomes saturated during use. The alumina
should be replaced if any of the following conditions exist:
• The alumina has been used for a three-month period.
• Oil has accumulated in the cold trap.
• Most of the alumina pellets are no longer white.
When you replace the alumina, you may also need to change the vacuum pump oil
if the interval between changes of alumina has been short.
Do not perform the following procedure on used alumina. The resultant oil vapors
may cause a fire or an explosion.
Perform the following steps to replace the alumina:
1. Place the analyzer ON/OFF switch in the OFF position., and turn off the vacuum pump.
If the high vacuum pump is installed, wait for it to completely stop (approximately
10 minutes).
2. Remove the vacuum pump panel.
3. Prepare fresh alumina as follows:
a. Heat an oven between 250
b. Pour about 180 grams of alumina into a glass or metal container for each trap
(approximately 250 mL if a graduated beaker is used). Place the container in the
oven.
c. Bake the alumina for two hours; turn off the oven.
d. Allow the alumina to cool in the oven before pouring it into the traps.
8-12
° °
C and 350 C.
Preventive Maintenance
202-42811-01 - Mar 2011