My new 48v 1200W mean well power supply

[jana]

I just bought a new powersupply.
http://www.ebay.com/itm/Mean-Well-1K2S-N048-Remote-Sense-Type-SCN-1K2-48-5338-/120832977895?pt=LH_DefaultDomain_0&hash=item1c2234ebe7#ht_1044wt_952g
Thanks to Kin for finding this and telling about it.
I has the possibility to adjust the output voltage 20%-100% using an external 1-5V signal, but what do I need to adjust this? Just a pot-meter?
On the last page of the attachment there are some schematics that might explain this. If someone could have a look I will be grateful.

 

[Gödel]

They don't seem to tell you how much input current the 5v control supply needs to source to give you a linear control curve, input V vs. output V. I s'pose it's an oversight.