Author Topic: Micronta 22-220 FET multimeter calibration?  (Read 869 times)

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Online BeBuLamarTopic starter

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Micronta 22-220 FET multimeter calibration?
« on: November 30, 2023, 12:46:01 pm »
I have this old Radio Shack Micronta 22-220 which kind of a Simpson 260 wanna bee. It does have the FET front end to provide 10 MOhms input impedance for the DCV. There are a couple of potentionmeter inside which I believe for calibration. Does anyone know how to do the calibration on this thing? Besides I couldn't even find a user manual for it. I am sure I have the user manual somewhere but I can't find it. I bought it new sometime in the early 80's.
 

Online xrunner

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Re: Micronta 22-220 FET multimeter calibration?
« Reply #1 on: November 30, 2023, 01:47:41 pm »
All you have to do is Google your question and you will find the answer to this. I just did and in a matter of 30 seconds it was solved. No I'm not going to give you the link because you will benefit more from doing it yourself.

I don't understand why people don't do that first before limiting their search to one forum on the internet.  :-\
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Online BeBuLamarTopic starter

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Re: Micronta 22-220 FET multimeter calibration?
« Reply #2 on: November 30, 2023, 04:19:00 pm »
I've spent hours searching the web and find nothing but a schematica diagram. No service manual or user's manual. Thank you very much for nothing.
 

Offline AVGresponding

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Re: Micronta 22-220 FET multimeter calibration?
« Reply #3 on: November 30, 2023, 05:49:00 pm »
Elektrotanya and RadioMuseum are the places to look for things like this
nuqDaq yuch Dapol?
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Online BeBuLamarTopic starter

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Re: Micronta 22-220 FET multimeter calibration?
« Reply #4 on: November 30, 2023, 06:03:54 pm »
I looked both and none was found except that is the schematic diagram.
 

Offline Oilngas

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Re: Micronta 22-220 FET multimeter calibration?
« Reply #5 on: December 01, 2023, 04:07:34 am »
Here are the voltage cal pots.
Lots and lots of VTVM's and Triplett analog multimeters
 
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Online BeBuLamarTopic starter

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Re: Micronta 22-220 FET multimeter calibration?
« Reply #6 on: December 01, 2023, 01:26:44 pm »
Thank you for the picture and the manual.
I checked it out and it's in specs so there isn't much need to calibrate but it is good to know.
 


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