I'd seen many UV in a wattmeter circuit which looks like ground.
What does UV stands for in circuit?
Thanks

 

It is the abbreviation for microvolts.

hgmjr

 

It is the abbreviation for microvolts.

hgmjr

Thanks....
so it meant for small voltage supply or ground?

 

Thanks....
so it meant for small voltage supply or ground?

Yes it is meant for small voltages. However, you can use it to measure larger voltages by designing the proper resistive padding network.

hgmjr

 

Just so you understand how small a uV is:
1mV (millivolt) is 1/1000 of 1v.
1uV (microvolt) is 1/1000 of 1mV, or 1/1,000,000 of 1v.

 

I'd seen many UV in a wattmeter circuit which looks like ground.
What does UV stands for in circuit?
Thanks

Can you post the circuit?

Ken

 

Can you post the circuit?

Ken

here it is....
i was wondering it is big possibility it is a ground.

Larger picture here:
http://farm4.static.flickr.com/3255/3146923307_b12f25b46a_b.jpg

 

Looks like it is just a letter reference designation to all connections made to the "SOURCE-" in the lower-left of the schematic...not a universal thing in electronic schematics.

Ken

 

Looks like it is just a letter reference designation to all connections made to the "SOURCE-" in the lower-left of the schematic...not a universal thing in electronic schematics.

Ken

erm...sorry but does that means anything beside designation?

 

Nope...I don't think so. Instead of "UV", it could have been labeled "SOURCE-" or "A" or "G" or "COM" or "123" or any other way to relate the connections throughout that schematic that connect to the line between SOURCE- and the R15.

Ken

 

Now that I have the schematic to refer to the answer to your question is a bit clearer. The "UV" label you were asking about is actually 0V and just appears to be "UV" since the upper part of the 0 is obscured by the horizontal bar in the ground symbol.

hgmjr

 

It looks like "0V", not "UV" which would be consistant with its use as a ground symbol. Considering the confusion that it caused, it seems a less than professional thing to do.

Edit -- constructed my response before reading the above post. I agree with what hgmjr said.

 

OK..thanks bro for helping.