Calling all SM3040 owners: how do you set a constant current output on these PSUs?
Before I tear what little hair I have out or worse, disembowel the PSU, someone please tell me I'm not going mad. On all other PSU I have, you short the output with a DMM and turn up the current limit until the s/c current is your desired constant current. Then you remove the short and turn up the output voltage to above your desired compliance voltage.
But if I do that on my SM3040 the output current into the short never goes above about 350mA. Is this normal or is it faulty?
If I connect it to an electronic load and dial in, say, 20A, on the load then if the current limit is set just a little higher it outputs 20A at the desired voltage but if the demand goes higher rather than current limiting, the voltage just dies completely.
Before I tear what little hair I have out or worse, disembowel the PSU, someone please tell me I'm not going mad. On all other PSU I have, you short the output with a DMM and turn up the current limit until the s/c current is your desired constant current. Then you remove the short and turn up the output voltage to above your desired compliance voltage.
But if I do that on my SM3040 the output current into the short never goes above about 350mA. Is this normal or is it faulty?
If I connect it to an electronic load and dial in, say, 20A, on the load then if the current limit is set just a little higher it outputs 20A at the desired voltage but if the demand goes higher rather than current limiting, the voltage just dies completely.