Adjusting to correct voltage. MW driver with cxb 3590

To da peeps,

I'm hoping someone can clue me in on the proper way to fine tune my driver for my light. After much looking searching etc I purchased the Cxb3590 3000k 72 v to be run by HLG-120H-C1400 (a) type. My main concern is not blowing out my light. So I hooked up wall supply and got 108 volts all day. I tried to adjust voltage nada. Assuming that left is down and to the right is up on pot. Then I put driver under load to power a 90v DC motor. Still I was not able to turn the voltage down with the internal potentiometer. I have search quite a bit but have not found any information as to why I’m not able to adjust my setup? Thanks in again for any help.

The internal pot adjusts the current. Since the CXBs (72v) max current is above 1400ma you shouldn't have any concern about starting it up at full power and turning the pot down using a meter to dial in your desired current.

Rahz thanks for the supports. Safe to assume left is down and right is up?

Safe to assume. I've never messed with the A version but it's not going much past 1.4 amps anyway.

You probably want it turned all the way up (to the right). Are you driving a pair of CXB3590s 72V or just one?

If it is a pair, the driver will reduce current from it maximum (1525mA) down to maybe 1050mA because the voltage of the COBs would be too high. So the driver automatically reduces the current as low as it has to to get the voltage down to ~144V.

Just one. Trying to hit the "sweet spot" 1.05/1.2 amps. Looking forward maybe the (b) style driver may be a better idea in the future.

If you don't plan on adjusting the current more than once there's nothing wrong with the A version. In either case a meter is required to get an exact current level. If you don't have a meter and want a cheap way to set the current use the B version and put a resistor between the dim wires. Costs 40 cents. A 1400ma driver with a 80K ohm resistor between the dim wires will provide 1.12 amps, maybe a tad bit more in practice.

Make sure the K is in there. I accidentally purchased some 60 ohm resistors. Took me a while to figure that one out.

I do have a meter and have been scratching my head as to wtf is up. Um, just noticed i was measuring V and not mA/A on my meter. No wonder the volts where not adjusting. Guess I'm going to have to set this get right apparatus down for a bit...silly me.