System Shut Down
1. Place the On/Off switch on the 2K controller in the “Off” position.
2. Shut the liquid valve (clockwise direction) on the Dura-Cyl dewar.
3. If possible, purge with GN
2
until next use. See “Purging with Gaseous Nitrogen,” page 50, for
additional information.
IMPORTANT: The supply pressure reading on the 2K controller may read 12 ± PSI due to the added GN
2
pressure.
Dura-Cyl Dewar (22psi) Change Out Procedure
The Dura-Cyl dewar will need to be changed out from time to time. The operator should visually check
the gauges on the Dura-Cyl dewar to monitor the internal liquid level. When the gauges read low levels,
it must be swapped with a full Dura-Cyl dewar.
1. Shut the liquid valve (clockwise direction) on the Dura-Cyl dewar.
2. Disconnect the C-Flex hose from the Dura-Cul dewar using a 7/8” open end wrench or adjustable
crescent wrench.
3. Connect the C-Flex hose to the liquid outlet on the full Dura-Cyl dewar using a 7/8” open end
wrench or adjustable crescent wrench.
IMPORTANT: The UltraDoser 2K will continue to dose properly until the liquid level inside the
UltraDoser unit runs low. This feature gives the operator a reasonable window in which to change out the
Dura-Cyl dewar without disrupting the production operation.
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