Velleman projects K8004 Assembly instructions - Manual (Page 7)

7
Test
14. Test
Connect the supplied 4k7 resistor between the + and - points of the load.
Connect the Vref point to the DC input.
Set preset RV3 to the middle of its adjustment range.
Connect a DC voltage between 8 and 35V with the points +V and GND.
Measure between the + and - points of LOAD with a voltmeter (set to read DC voltage).
If everything goes well then the voltage on the output can be adjusted with RV2.
Fig 1.0