Shel lab BACTRON300, Инструкция по установке и эксплуатации, Страница: 39 / 86

39 | P a g e
OPERATION (CONTINUED)
Continued on next page
Establish an Anaerobic Atmosphere (Continued)
12. Reinstall the right arm port door and secure it, as per the Installing
the Arm Port Doors procedure on page 24.
a. Once secured, loosen the knob on the right arm port door by about
half a turn. This should create a small leak that aerobic atmosphere
can be pushed out through.
13. AMG should pulse rather than flow continually into the chamber. The
Chamber Gas light should activate for 1 to 2 seconds before
deactivating for 1 to 2 seconds. This will be accompanied by a clicking
sound that is the chamber gas solenoid opening and closing.
a. If the interval between pulses are longer than 1 to 2 seconds, or if
there is no pulsing, slowly loosen the arm port knob until the interval
decreases.
b. If gas continually pulses into the chamber, tighten the right arm port
door knob until an injection interval of 1 to 2 seconds is established.
Continual streaming means that gas is likely exiting the chamber
directly through a door, rather than accumulating and creating the
turbulence necessary to purge the chamber atmosphere.
Aerobic Atmosphere
Exiting Chamber
14. Fogging and humidity . Depending on ambient conditions
(temperature of the room and humidity) there may be mild or heavy
condensation on the inside of the chamber during the gas purge.
a. This is due to the formation of water vapor during the catalytic
reaction.
b. The condensate should dissipate by the end of the purge as oxygen
decreases and the condensate controller removes water vapor from
the chamber atmosphere.
15. Do not enter the workspace chamber or use the pass box while the
BACTRON is purging the chamber atmosphere.