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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

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Old 10th Jul 2019, 9:21 pm   #1
mikko rintala
Triode
 
Join Date: Aug 2018
Location: Kauhava, Finland
Posts: 37
Default AVO CT 160 digital panel current meter

Mikko hey. I'd like to try the digital panel meter through the front panel A1 and A2 anode connectors. How big resistor I have to put in to avoid the overvoltage relays going on. With an analog panel gauge, this works great. But I would like a digital one.
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Old 11th Jul 2019, 8:05 pm   #2
Ed_Dinning
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Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,173
Default Re: AVO CT 160 digital panel current meter

Hi Mikko, for initial tests it would be as well to use a separate battery powered DVM.
Drawing DVM meter supplies from mains or the tester itself is full of dangers due to possible common mode problems.
Note that this can also be a problem if you take a digital output to a computer for data logging/ curve tracing.

Ed
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Old 11th Jul 2019, 9:44 pm   #3
mikko rintala
Triode
 
Join Date: Aug 2018
Location: Kauhava, Finland
Posts: 37
Default Re: AVO CT 160 digital panel current meter

Thanks. The purpose would be to use a link power meter with its own 5v battery. What size would it be good to put in the resistance that the measurement would remain true?

https://www.ebay.com/itm/DC-100mA-Re...MAAOSwOeVZzl-y
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