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Question Edspot Galvanometer

7 years 8 months ago #24833 by monkapotamus
We have a WPA Edspot Galvanometer which appears to be working okay in that all the lights come on but there is no display on the scale, it looks as though the display light has shifted slightly, does anyone know of a solution to this problem, or if an instruction manual exists?
Cheers

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7 years 8 months ago #24835 by Goonrob
I believe Beecroft [E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. Tel: 01709 377881 ] still sell these- give them a phone call & see if they'll send you a pdf, or similar, of the instruction manual.

Meantime- I believe there are a couple of adjustment screws on the reverse of the casing that will allow you to move the mirror assembly to re-align things. DO NOT undo them- only loosen.. or you'll be :bang

Helps if yuo have a colleague who can watch the front for the spot :) and expect the thing to shift as you re-tighten the screws. So tighten, check, move to re-adjust, re-tighten...

Worse case scenario though :( is the wire of the primary mirror has broken. You'll need a professional to repair that. (got fingers crossed it isn't that!)

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7 years 8 months ago #24836 by m_mccann
Make sure the scale is set to the lowest sensitivity. And turn the zero dial until the light comes onto the scale...this may require an extreme amount of patience! Especially if it is set on a high sensitivity.
Good luck- they can be temperamental as they are so sensitive.

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7 years 8 months ago - 7 years 8 months ago #24838 by beaky
They are very easy to break. When I was doing my Physics A level I watched my teacher blow one up in a big puff of smoke. Was impressive. More impressive was the reaction of the technician who, 15 years later, I have the greatest of sympathy for.

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7 years 8 months ago #24843 by monkapotamus
Cheers, turns out someone had been playing with the adjustment screws, took 2 minutes to rectify.
Thanks again

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7 years 8 months ago #24876 by AndyG
Very old but simple tip for this and any other equipment that has either adjustment from the rear, an awkward viewing angle or just when your arms are no longer long enough to reach the screws - set a mirror in front of unit and look at the reflection! Crt alignment turns from downright difficult to a doddle ...

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7 years 8 months ago #24878 by prep_room_boy

monkapotamus wrote: or if an instruction manual exists?
Cheers


If it is the KN90 model, then I still have our original instruction manual.

I'll try to scan it and dump it somewhere in the 'Downloads' section.

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7 years 8 months ago #24879 by monkapotamus
Yes it is the KN90, cheers that would be most helpful.

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7 years 8 months ago #24885 by prep_room_boy
There you go. Downloads - user manuals section.
The following user(s) said Thank You: monkapotamus

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7 months 3 weeks ago #41726 by doormat_1
I know it has been a long time since this post was active but I have 2 of these in my faculty and want to check if they are working but cannot find the manual for them anywhere. I see that someone once uploaded one, any chance that document still exists?

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7 months 3 weeks ago #41727 by monkapotamus
Hi, I still have a copy of the manual, I don't know how to upload to this site, but I could post a copy out to you if that is okay.

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7 months 3 weeks ago #41729 by doormat_1
It looks like if you hit action and reply you can add an attachment there, otherwise, yes please post it to my school address

many thanks

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7 months 3 weeks ago #41730 by monkapotamus
Cheers, the file size is too big to attach so will post it.
The following user(s) said Thank You: doormat_1

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7 months 2 weeks ago #41731 by doormat_1
thanks for sending the instructions, picked them up today.

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3 months 2 weeks ago #41773 by Techie_Paul
Could I add my request for a manual? Clearing out the black hole called a storage area, found an Edspot. Trouble is I told the Physics teacher who would like to use it next school year, Can anyone help?

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1 month 3 weeks ago #41785 by monkapotamus
If you send me your school address I can post one to you, the file is too big to add as an attachment

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