You are not logged in Log in Login
UIUC ECE Title Bar ece444
Theory and Fabrication of Integrated Circuits University of Illinois at Urbana-Champaign logo HOME ·
LECTURE ·
LAB ·
GT ·
CALCULATORS · Text Only
· · · · ·
Hydrogen Alarms
Hydrogen is a highly flammable and explosive gas; therefore a hydrogen alarm has been installed in the ECE444 laboratory to monitor hydrogen levels.
There are 2 levels of alarms reported by the Hydrogen Detection System located by the main glass doors to the lab:
Alarm Level 1
- Prepare to evacuate the lab
If the concentration of H2 exceeds 5% of the LEL (lower explosive limit) alarm level one is activated.
This alarm level is local only (Sonalert annunciates, beacon light activated) and allows the TA a window of time to evaluate the lab for gross leaks or simple mistakes.
Alarm Level 2
- Evacuate the building immediately
If the concentration of H2 exceeds 10% of the LEL alarm two is activated.
This is a building wide alarm which activates the lab and building fire alarm. Hydrogen levels are dangerously high and an explosion could occur.
Local Furnace H2 Alarm
The oxidation furnaces have built-in flow meters which determine the amounts of O2 and H2 injected into the furnace. If too much H2 is injected, a local alarm at the furnace will sound.
The gas controller fails-over to a safe condition, so no evacuation is needed.
Lab Safety
·
·
·
·
·Hydrogen Alarms
·
·
·
· Safety Handout
In case of emergency, always call 9-911 and give the following information:
·Your name
·Location:
IC Fabrication Laboratory
Room 50Q
Basement of Everitt Lab
1406 W. Green St.
·Specific information about the emergency
Answers provided by this service may not be relevant to the materials presented in this website.
Department of Electrical and Computer Engineering
College of Engineering
University of Illinois Urbana-Champaign
Contact ece444
Copyright © 2007, 2008 The Board of Trustees at the University of Illinois. All rights reserved.
archives: ©1999 ©2000 ©2004 ©2005 ©2006
