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-   -   Can oscilloscopes be damaged by magnets? (http://www.diychatroom.com/f18/can-oscilloscopes-damaged-magnets-13861/)

llewellyn 11-28-2007 02:17 PM

Can oscilloscopes be damaged by magnets?
 
The item in question is an oscilloscope - GM Intek - GOS 652G 50 Mgh - need tips on its use and maintenance please.
For example, can a magnet from a car speaker or a hi-fi system (even if nothing is plugged in) destroy the functioning of an ocsilloscope? Is it possible to recallibrate these instruments?
I'd appreciate the simple version of the answers - new to all things electrical!!:huh:

Thanks guys
llewellyn

elkangorito 11-29-2007 06:39 AM

Assuming that the oscilloscope (CRO) does not have any Faraday Shielding, yes, a magnet can affect the CRT (Cathode Ray Tube) if the magnet is reasonably strong & is moved around the unit whilst it is turned on. The affect can be "flaring", lightened or darkened corners etc. If this happens, the problem can usually be resolved by degaussing.

Magnets cannot affect the CRO if it is switched off.

Good quality CRO's can be calibrated.

Like all electronic test equipment, it should be kept & used in an environment that has about 50% humidity.

J. V. 11-29-2007 12:33 PM

Magnets can do weird things to sensitive electronic's such as OScopes.
I have never witnessed this event.
What do you plan to use your scope for? Do you understand the user manual that came with it. I am not familiar with your scope, but it is a good brand. Is it portable or a table mount.
If you can tell me what you plan to do with it, I can help you. OScopes can measure many different things.
A good way to start is to understand what each selection is for. Like time and voltage for example.
Yes, OScopes can and should be calibrated on a regular schedule. This would depend on how accurate you want to be. Let me know.

Stubbie 11-29-2007 12:42 PM

I hope you didn't have someone pull a practical joke on you like happened to me years ago at Devry University before I realized my brain wasn't bent right for electronics. That guy thought it was funny as hell. I remember at his funeral... finally seeing the humor in it. Oh and the flowers were beautiful.....:)


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