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- Posts: 8
- Joined: Mon Jun 07, 2010 2:47 am
I'm thinking the only thing it could be is the 6-port valve is contaminated because that's the only thing that's a variable when opening the sample valve besides the sample loop. When I did call Agilent last time I asked if steam cleaning could fix the contamination and they said that rarely works. I tried calling them today but they were closed. I did look the 6-port valve up and it's over $1000 so I don't want to waste the money if there's something else I could try first.
Oh, one more thing. We typically run around 90 oven, 110 loop and 115 transfer line. I cranked all three to 250 and I was getting a lot more response then I was previously. Another test I did was watched the output for a while, which was around 15, and then opened the sample valve. It would jump up to around 250-300 and then settle back down to around 20, constantly. It would sit at 20 forever until I closed the sample valve and then it would drop back down to 15, showing that flushing through the 6-port valve and sample loop was causing static contamination to be sent through the system.
Thanks in advance for any help!