Despatch LCC1-51-3 - Manual (Page 42)

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meter to the desired setting (see table below for suggested values). This
program energizes the purge solenoid valve.
7.
The second segment is the MAINTAIN MODE, the purge solenoid valve is
deenergized and the purge solenoid is energized to maintain the nitrogen level to
less than the purge level. Adjustment is made with a needle valve located at the
rear of the oven. The maintain valve is left energized for as long as the nitrogen
level is desired to be maintained. (See table below for suggested values.)
Desired Oxygen Concentration
< 100 PPM < 1000 PPM
Purge 150 125 LCC1-16
Maintain 75 65
Purge 200 175 LCC1-51
Maintain 160 140
8.
The last segment of the program is the cooldown, where the water valves are
energized to bring the chamber temperature down to a safe unloading
temperature.
Water and Nitrogen Piping