Sorry , posted here by mistake , will repost your question
Hi, how old is your RS meter?
Also are you sure of the model #?
Hi let me do some research as it seems quite old lol.
I should be able to locate that one for you but it may take me a day or so for that as the site for these old Radio Shack meters is a bit slow to respond.
In any case, I will stick with you until this is complete.
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Are you sure the last 8 is not an A, also, a picture of the meter could help me to identify it.
I can also help you in knowing how to operate it, those are never complicated for me being an electrical engineer.
Here's some INSIGHT about that meter -- FIRST that looks like the mirror image of the Simpson 270 that I used back in the early 80's, and it wouldn't surprise me if Radio Shack just had Simpson stick their sticker on it to sell it in their store.
Compare it to your unit here -
Looking at the info, I'd start looking for SIMPSON 270 information instead of Radio Shack Information. Simpson built it.
Mouser has the schematic of the 270 at the top of the page. Comes with the instruction manual on page 2 --
Your micronta had to be built by Simpson.
Darn, you were READING it before I finished it.
Let's see if I can finish it.
I hate not having hyper text hyper texted....
I'm sure the 270 is your voltmeter. It's just TOO familiar to me. Hey, after 30 years and knowing it the moment I saw it, you don't have that many moments in your lifetime.