From mtang at snf.stanford.edu Fri Dec 1 09:42:20 2006 From: mtang at snf.stanford.edu (mtang at snf.stanford.edu) Date: Fri, 1 Dec 2006 09:42:20 -0800 Subject: Problem wbdiff SNF 2006-11-22 23:59:19: Out of 50:1 HF Message-ID: 50:1 HF has arrived. Many apologies for the inconvenience. Please see labmembers at snf note yesterday. From shott at snf.stanford.edu Sat Dec 2 08:08:22 2006 From: shott at snf.stanford.edu (shott at snf.stanford.edu) Date: Sat, 2 Dec 2006 08:08:22 -0800 Subject: Problem wbdiff SNF 2006-12-02 08:08:22: Water leakage again ... Message-ID: I got the call from work control this morning at 6 a.m. about a lab leak alarm. When I got in at 6:30, the TraceTek was, once again, reading 097 ... behind wbdiff. I'm guessing that there was about a 500 ml of water (well, pH neutral it seems) on the floor but with no obvious source. There also appears to be a bit of water on the "manifold shelf" on the right side of the wetbanch. However, I can't figure what is leaking there, and I can't tie that to the water on the floor. In order to try to test things, I did a test of the left dump rinse, the rightmost dump rinse, and the 4" part of the SRD. All with no evidence of additional leakage. Because I did not want to waste the chemicals, I did not test either the aspirators or the HF drains. Looking underneath the deck, I didn't see any leaking fittings. However, I did notice that there had been some splashing in there and that there are some oval slots up near the top of the reaar wall that appear to go into the air plenum. I'm wondering whether that is leaking. So, we clearly have an occasional leak ... but I still can't identify the source. Thanks, John From kupnik at snf.stanford.edu Mon Dec 11 22:54:49 2006 From: kupnik at snf.stanford.edu (kupnik at snf.stanford.edu) Date: Mon, 11 Dec 2006 22:54:49 -0800 Subject: Problem wbdiff SNF 2006-12-11 22:54:48: low liq level sensor is not working properly for 5:1:1 Message-ID: From jhaydon at snf.stanford.edu Tue Dec 12 08:55:27 2006 From: jhaydon at snf.stanford.edu (jhaydon at snf.stanford.edu) Date: Tue, 12 Dec 2006 08:55:27 -0800 Subject: Problem wbdiff SNF 2006-12-11 22:54:48: low liq level sensor is not working properly for 5:1:1 Message-ID: replaced level switch From jhaydon at snf.stanford.edu Mon Dec 18 12:18:01 2006 From: jhaydon at snf.stanford.edu (jhaydon at snf.stanford.edu) Date: Mon, 18 Dec 2006 12:18:01 -0800 Subject: Shutdown wbdiff SNF 2006-12-18 12:18:01: shutdown Message-ID: