Glove Box

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Revision as of 19:59, 27 October 2012

Please read these instructions before using the Glove Box, and log every operation in the Glove box logbook!

All users require training from a trained user (Feri, Fábián Gábor, Szirmai Péter). Use is allowed only if the trainer approves to that. Any violation results in being banned from use.

Normal operation

Left: Good (GB1 and VPG open, RKM active) Right: Not good

Checking before the work, also check daily when box is unused

• Circulator and water cooling is running. Never press Regeneration button on the panel.
• Box pressure is 2-8 mbar, O₂, H₂O levels are below 0.1 ppm. If any of above is not like that, do not work!!! Report to Feri, 30-452-4705
• Check pressure in Ar bottle-station. If below 10 bar, change bottle. PURGE!!! (Better to leave it for a trained user)
• Turn on the vacuum pump before use, wait until end vacuum goes to below < 0.1 mbar (indicator is on the control box of the glovebox, measures the Pirani). The vacuum pump should not run when the box is not in use. Switch on/off with the separate switch on on the wall at the height of the basin.

Working

• check if inner door of both antechambers are closed
• fill up the used chamber from box (keep a slight 50-100 mbar pressure under the box, this prevents that residual air in the otherwise evacuated antechamber goes into the box)
• open chamber door. NEVER TOUCH the inside with pure hands, use gloves.
• place sample close to inner end. Never put in any solvents. Samples in containers should be a bit opened!
• BBe careful with the black valve handle, experience shows that if not gently handled it will leak!
• Evacuate to cc. 0.1 mbar (2 min. for small, 10 min for large chamber). Refill/repump twice to 500 mbar (max to 950 mbar, this prevents that residual air in the otherwise evacuated antechamber goes into the box). (Total: 6 min for small, 30 min for large chamber).
• Use gloves with talc. Use a shirt with a LONG SLEEVE. Use talc on naked arms. Remove rings, watches, bracelets, piercings etc.
• Go inside slowly so that box can react the pressure change. Same for coming out.

Leave box after work:

• Always close inner doors. Careful, only the handle part of the small chamber door should be touched. Glove can be hurt!!!
• Switch off light
• Both Chambers are closed from in-outside
• Chambers are pumped out to vacuum (< 0.1 mbar) and closed from pump, i.e. both chamber valves are in the close position.
• Check O₂, H₂O levels. If not below 0.5 ppm, note the time it takes to go down. Report to a trained user!
• Switch off the vacuum pump if you do not use it for a day at least.

For trained users only: Regeneration (if O₂ or H₂O level does not go below 0.1 ppm after 1 day without use)

• Secure all important samples into chambers, pump the chambers out, close.
• Switch off Circulator
• set 0.3 bar on Ar-H₂
• turn on Regeneration, process cannot be stopped!
• 1/2 bottle (100 bar) of Ar-H₂ per regeneration is needed
• Status can be monitored by clicking on the absorbent and checking "Status"

Regular service:

• H₂O sensor clean: 2-3 months
• Gloves: every second year or when worn out. Small leaks around mounting ring. Change glove O-rings as well.
• Particle filters: once per year
• Small-large antechamber O-rings: when looks worn out (after cc. 3 years)