What does this PSU feature do?

[miaulon]

Hi everyone!

I recently got an old 1970s regulated power supply unit off of ebay. I´ve tried looking for info on the manufaturer and had no success...


I want to ask you if anyone knows what is meant with the resistor connection thats printed on the positive outputs labeled V and I. This might be a newbie question, but i haven't had experience with this kind of PSU.

Thank you for your help!

 

[JonSnell Electronic]

The purpose is to monitor the current flowing through the load.

 

[jjasniew]

Why would it be "1/R"?

To set the current, i.e. hook up a 10 Ohm and you get 100 mA out when it's in constant current mode? Seems Bizarre -

 

[miaulon]

jjasniew: Yeah it just feels odd. I wish I could find a manual for it! I have the feeling I am missing something. But why make it go into constant current mode in that way if there is a switch to put the PSU into const. current though?


JonSnell: Maybe for an external meter? The PSU has a meter built in.


I suppose I'll have to re-cap it and just test to see what it does.

 

[JonSnell Electronic]

That is for an external meter.

 

[miaulon]

Thank you for your help!

 

[Mooly]

I have a couple of Farnell PSU's with a similar set up. The manual describes how to use the feature and why it exists. Yours will be the same...

Have a read at the pdf file.