It’s like controlling HP 34401a because both supports SCPI commands via RS232.
PSU manual:
Command reference:
Using it as voltmeter 
It’s important to not enable output now 
Measuring using RS-232 connection, not so precise, but as in specification — voltage set of 10mV (in fact 5mV step as we figured out before):
Version — it’s labeled as Agilent, but… :
