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Good evening everyone, Tomorrow I will be going to get my first (USED) Oscilloscope it is a Gould Advance OS250B, I think the b means its a 15Mhz and without the b its a 10MHZ. It does not come with probes So I order a set of these https://www.amazon.ca/dp/B00D5VAN6M/...088100_TE_item The gentleman that I am buying it from, bought it used also, but never used it himself, and he is unsure if it is calibrated, I was able to find a manual for the OS250 ( http://bee.mif.pg.gda.pl/ciasteczkow...ance/OS250.pdf )but seeing mine will be the ( B model ) do you guys think the same manual can be used to Calibration reference ? Do you guys have any advice for me seeing how I never owned or used a oscope before. any and all advice is appreciated.
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It can.Originally posted by Tibuck19 View Post
It is usual explained in Service manual, but here you have explanation in this Instruction manual too.
See Setting up procedure on pages 14 - 15.
Problem is, that you need all (or at least functionally alike) test instruments equipment cited in section 5.4. on page 14.
So not easy job, but if you have a friend with well equipped electronic lab, probably proper calibration things can be done. -
I see what you mean, That is a lot more equipment then I have for sure, Is keeping my fingers crossed that is calibrated even possible? or are these things something, that needs to be calibrated regularly? Perhaps I can find a local school that teaches Electronics and have the teacher and students look at it.Originally posted by WM6 View PostComment
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I just spoke with a few electronic schools in my area, None of them do their own calibration and are not equipped for such task, Am I wrong to think oscilloscopes don't need calibration as often as I thought ? and that there is a very good chance mine will be fine to do what I needed it to do for metal detectors builds? .Originally posted by Tibuck19 View PostComment
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Classical analog scopes need to be calibrated usually once per year.
This for high demand lab (NASA like) job.
Modern digital scopes can be self calibrating devices.
If your scope is not to much out of calibration (simple check with probe [x1] connected to
calibration signal ["CAL" output at Figure 6.] of your scope, and if shape of signal [square],
and V/div [1V] of calibrating signal, suit - direct or by additional probe tunning ), then it suit
to your MD DIY needs.Comment
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Worry about Functionality first. Most analog scopes are basically the same. YouTube should have ample tutorials to get you started. As for Calibrating the scope you will need calibrated references to transfer. At minimum Precision Freq Time Base and Voltage References.
Suitable voltage reference with .1% accuracy (Way more then needed for most DIY projects) is easy enough.
https://www.maximintegrated.com/en/p...s/MAX6126.html
Frequency Standards a bit more complex but in reach. http://www.ko4bb.com/Timing/FrequencyReference.php
This is easy and in reach. http://electriciantraining.tpub.com/...ission-115.htm
http://www.tek.com/document/online/p...g-oscilloscopeComment
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Thank you for all your help, advice and knowledge guys, I have the scope but still waiting on the probes to arrive, mean while I have been doing reading and watching this youtubers basic tutorials to oscope. https://www.youtube.com/playlist?lis...6BF38BC2E068E0 even though he using a tektronic oscilloscope, I do see many similarities between the his and mine.Comment
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