Cleaning dust from oscilloscope HP54501A - diyAudio
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Old 12th August 2012, 12:59 PM   #1
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Default Cleaning dust from oscilloscope HP54501A

I am in the process of calibrating an HP54501A. The procedure must be completed before the scope is used (even though I have tested the unit I have recently acquired and at least apparently works very well).

THe problem is the scope has at least 10 years of dust inside. There are several mm worth of grey fine dust on virtually every component.

A scope is a sensitive piece of equipment. What is the best most fail proof way of cleaning the dust from the boards?

I though of using:

1. non conductive fine brush
2. compressed air where needed
3. vacuum cleaner tube to suck the dust away from the device.

Please advise on better ways to clean it.

thanks
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Old 12th August 2012, 05:20 PM   #2
oshifis is offline oshifis  Hungary
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Location: Budapest, Hungary
We used 1 and 2 in the instrument service lab with success. 2 is not the compressed air can type, but a more powerful air compressor. Use it outside, not in the room. Check also leaking electrolytics.
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Old 12th August 2012, 05:45 PM   #3
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thankyou for your confirmation. I cleaned the scope and now it looks brand new. I did use a vacuum cleaner "decoupled" with a rubber tubing connected to GND (and so was my wrist).

The brush lifted the dust which was immediately sucked in the cleaner. The result is impressive!

I tested the oscilloscope and it still works flawlessly. Actually I noticed slightly less noise on idle. A placebo effect?
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