Thursday, April 23, 2009
Tuesday, April 21, 2009
Suggestions on OCEC filter change and assessment of OCEC operation
Darrell and Denet,
Thanks very much for the photos!
They look good. It looks like the trailer has cooled down quite a bit compared to last week. The flow rate has gone up from 6.8 lpm to 7.2 lpm. The CO2 peak looks nice, i.e. peak height decent. All the other parameters look good as well.
Please watch out for the filter change soon, Friday, I suppose. A few points to consider for filter change:
1. It is best to change filter right after the hour, so you do not lose a sample or wait for an analysis to finish.
2. Usually we bake the filter, i.e. 0 min sampling, then analysis before starting the cycle runs. Otherwise, the first sample after the filter change is wasted due to high OCEC background.
3. Remember to use 2 filters, otherwise, the sample flow is likely to blow the filter away.
4. Remember to make the coarse side of the filter to face the direction of the sample flow.
5. Be gentle with the quartz tubing. No need to over tighten. A good finger tight is sufficient. You can watch the flow monitor panel and the OCEC analysis panel during filter bake to get an idea if the filter is in place. If in doubt, please send me a screen shot, I can help.
Keep up with your good work! Talk to you soon,
Xiao-Ying
Thanks very much for the photos!
They look good. It looks like the trailer has cooled down quite a bit compared to last week. The flow rate has gone up from 6.8 lpm to 7.2 lpm. The CO2 peak looks nice, i.e. peak height decent. All the other parameters look good as well.
Please watch out for the filter change soon, Friday, I suppose. A few points to consider for filter change:
1. It is best to change filter right after the hour, so you do not lose a sample or wait for an analysis to finish.
2. Usually we bake the filter, i.e. 0 min sampling, then analysis before starting the cycle runs. Otherwise, the first sample after the filter change is wasted due to high OCEC background.
3. Remember to use 2 filters, otherwise, the sample flow is likely to blow the filter away.
4. Remember to make the coarse side of the filter to face the direction of the sample flow.
5. Be gentle with the quartz tubing. No need to over tighten. A good finger tight is sufficient. You can watch the flow monitor panel and the OCEC analysis panel during filter bake to get an idea if the filter is in place. If in doubt, please send me a screen shot, I can help.
Keep up with your good work! Talk to you soon,
Xiao-Ying
Monday, April 20, 2009
Cyl Pressure 20090420
he-ch4 hi - 1480 psi lo - 12 psi
he-o2 hi - 2200 psi lo - 10 psi
he hi - 2400 psi lo - 8 psi
he-o2 hi - 2200 psi lo - 10 psi
he hi - 2400 psi lo - 8 psi
Lasair clock reset
Reset Lasair data aquisition laptop clock to CST. Set Comm-200 Version 1.06 to: Save file - yes comma - yes
Program should write more than 5 lines and stop now.
Program should write more than 5 lines and stop now.
Sunday, April 19, 2009
Screenshots and Lasair
Please post screenshot procedure. Also had difficulty generating txt.document for lasair. All systems recording within parameters. Tank pressures are steady and pump functional.
Saturday, April 18, 2009
04-18-2009
I will get a CD and start saving the screenshots from the OCEC on to it this weekend, but for now I'm putting them on the desktop.
Everything is running. The only thing I saw is that the the He/CH4 cylinder went from 1800psi yesterday to 1500psi today. I was just wondering if that's normal.
Denet
Everything is running. The only thing I saw is that the the He/CH4 cylinder went from 1800psi yesterday to 1500psi today. I was just wondering if that's normal.
Denet
Friday, April 17, 2009
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