Zaphappy
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I have an instrument with (3) 2 terminal inputs. Each labeled U- U+ (3 channels)
All inputs measure 4 megohms and any terminal measures 4 megohms between.
With meter across chan 1 (U- U+) and I short chan 1 U- to chan 2 U- resistance drops to 3 megohms.
When I additionally short all U- inputs together I get 2.67 megohms.
If I measure across any channel and short across another the resistance remains 4 meg.
How the heck to I figure out the actual circuit ?
This is a 3 phase power analyzer with "isolated" inputs. I need the equivalent schematic so I can adapt input dividers.
I have attached the manufacturer schematic. Still confused
All inputs measure 4 megohms and any terminal measures 4 megohms between.
With meter across chan 1 (U- U+) and I short chan 1 U- to chan 2 U- resistance drops to 3 megohms.
When I additionally short all U- inputs together I get 2.67 megohms.
If I measure across any channel and short across another the resistance remains 4 meg.
How the heck to I figure out the actual circuit ?
This is a 3 phase power analyzer with "isolated" inputs. I need the equivalent schematic so I can adapt input dividers.
I have attached the manufacturer schematic. Still confused
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