[labnetwork] CH2F2 detection

[Collins, Deon]

The problem is occurring due to the detection equipment cross referencing chemicals. We use a DOD PS-7 detection system. The system has the same shortcoming.

My suggestion would be to do a complete shakedown of the area with a mobile detection system before opening the chamber.  Once you have determined the levels in the surrounding area are clear I would put that channel in standby. You can rely on the remote unit for toxicity levels during the cleaning procedure.

From: labnetwork <labnetwork-bounces at mtl.mit.edu> On Behalf Of Nava Ariel-Sternberg
Sent: Thursday, August 26, 2021 8:49 AM
To: labnetwork at mtl.mit.edu
Subject: [labnetwork] CH2F2 detection

Dear all,
I hope that you had a good summer and returning to a certain level of normalcy in your corner of the world.
I'm writing to ask about CH2F2 detection. Which sensor are you using for CH2F2 detection? We get false alarms whenever someone is using IPA in a certain proximity of the sensor (e.g. during a PM chamber cleaning). If you have any recommendations to reduce false alarms related to CH2F2 detection that would be highly appreciated!
Stay safe,
Nava


Nava Ariel-Sternberg, Ph.D.
Director of CNI Shared Labs
Columbia University
CEPSR/MC 8903
530 west 120th st. NY
NY 10027
Office: 212-8549927
Cell: 201-5627600


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