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| How do I switch to Constant Current instead of Constant Voltage on RD6018? |
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| sofakng:
I'm trying to test an LED with a max current of 100 mA. The RD6018 shows [CV] at the bottom of the screen so I'm assuming it's in Constant Voltage mode so how do I switch to Constant Current? I've already destroyed one LED because of my misunderstanding of the bench power supply. I had V-SET to 5.00v and I-SET to 0.9A (and no OCP). I'm confused though because I have current set to 0.9A but I'm guessing that only works in Constant Current mode? |
| Fungus:
I doubt it has constant current mode. For an LED you can set the voltage much too high then use the current limiter. Set it to 100mA. |
| wasedadoc:
0.9A is 900mA. That is 9 times the 100mA max of the LED. |
| Martin72:
Hi, A supply is in it´s constant current mode when you have reached the pre-adjusted current. Until this it´s in constant voltage mode. For your LED you should set the current to 100mA before. BTW, what LED is it? |
| sofakng:
Ahhhh... thanks. I'm an idiot. 0.9A is 900mA as mentioned by wasedadoc. The LEDs are the SFH 4547. What is the expected behavior of the following settings? V-SET: 5.0v I-SET: 0.1A (100mA) The LED has a forward voltage of 1.5V so would the PSU reduce the voltage from 5.0V to 1.5V and go into Constant Current mode to limit the current to 100 mA? Also -- When I measure the LED with my multimeter (Fluke 87V) using the diode mode, it shows 1.1V. The specifications show 1.5V so I was expecting to see that? |
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