VICI NPM - Manual (Page 6)

4
Installation and Operation
Operation
In normal operation the outside temperature of the purifier is warm,
but should not be uncomfortable to the touch. The 24 VDC power
supply maintains the purifier trap at a constant temperature, and
should be located so that the illuminated LED can serve as a visual
indicator of purifier operation.
Removing the HPM or NPM from the System
To remove the purifier from the carrier gas line:
1. Disconnect the power supply. Disconnect the output line from
the instrument while maintaining carrier flow.
2. Allow about one hour for the purifier to cool. After it reaches
ambient temperature, cap the output line and allow the purifier
to be pressurized for several minutes.
3. Remove the input line and immediately cap it. This maintains
a carrier gas atmosphere on the gettering substrate, increasing
its lifetime.
To reinstall, follow the instructions in the Installation section at the
top of page 3.