Gas chromatography soot blowing

There are usually two methods of soot blowing in gas chromatography, one is suction type, using a vacuum cleaner, and the other is instrument air blowing. Things to note: 1. Surface cleaning. It is recommended to move the machine to an open area for cleaning. Otherwise, it will easily cause secondary pollution of the circuit board. The dust is highly conductive. ； 2. Remember not to blow the circuit board directly with air. Especially when blowing directly to the capacitor on the circuit board, it is easy to cause the capacitor to tilt. Therefore, pay attention to blowing along the bottom of the circuit board to ensure that the dust will not be deposited back to the circuit board again. ； 3. The purge pressure is limited to 0.5MPA and should be controlled at 0.3…0.5. ； 4. When moving the machine, pay attention to the pipeline head to prevent dust from entering the pipeline. ； 5. Pay attention to the wiring marks, whether it is the circuit or gas line ；

Thank you, my friend! It's a little difficult to remove all the chromatograms. If I use a suction type, is it okay to use a household vacuum cleaner? Or is there a vacuum cleaner specifically for dust removal?

I use a regular vacuum cleaner. Mainly for the column box door insulation layer and fan area. The circuit area is mainly for the lower layer, the circuit board layer, just light tape. Personal opinion.

I very much agree with the suggestions on the second floor. The summary is: 1. Cut off the power (to ensure personal safety) 2. Mark the connection terminals (for complete recovery) 3. Pay attention to the flow rate of the purge gas (it will not cause harm to the circuit board) 4. Do not damage the circuit part and do not affect other instruments

I think you should not focus on how to blow the dust, but should reflect on why there is so much dust. The room for the chromatographic column should have very high requirements, such as air conditioning, floor, etc. You should remember to pay attention to the cleanliness of the instrument when using it.

Just be careful not to touch the gas circuit board. Also, if you disassemble it, you must be able to install it. I blew it, and it was a mess after I dismantled it. It was fine.

Your suggestion is good, but we don't have such good conditions here. No one has cleaned up the factory since its establishment, which has been 3 years. I just took over.

For industrial application of chromatography, the environment is poor and the quantity is large, so the conditions are not very good. I used to blow it twice a year, and there was a lot of dust. At the same time, dust in the air can easily enter the instrument due to electrostatic adsorption. You will know it if you turn on your home computer regularly.