The only difference between 6632B and 66312A according to the spec sheet is that 66312A has dynamic measurement capabilities but otherwise I think the two are pretty much identical.
You forgot to mention just how big and heavy the transformer is. I have some very similar 66309D supplies from the same family. The manual says the supplies weigh 20 pounds. The majority of that weight is probably in the transformer. The measurement buffer size is 4K, with a sample interval of 15us to 32s. That can be used to capture some detailed current waveforms from a system under test.
I wonder how fast the CC regulation is on this unit. On the 66332A (the same family, but 5A) it's remarkably slow, taking tens to hundreds of milliseconds to switch to CC mode after connecting a load.
Very good video. Can you clarify a dummy doubt? If I set the power supply 5v and 20mA and I connect a LED on the output without any resistor, will the power supply limit the 20mA and move the voltage down and will not burn the LED? If a put a Li-On battery to load 3.7V that specs says load 4.2v 1700mA, will the power at the begin have 1700mA, but as reach 4.2v will start decreasing the A to near 0? Thanks in advance
1. if you set the output to 5V and limit the current to 20mA, the output voltage will drop to whatever value so that the maximum output current remains 20mA. So correct LED will not burn (if it is rated for 20mA, for small LEDs, 5mA is plenty). 2. Yes you can use the power supply as a charger exactly as you suggested. One thing I would watch out is, make sure that the set voltage of your power supply is higher than the battery voltage. For this specific power supply if the set voltage is lower it will discharge the battery, but for other power supplies, depending on the design, it could cause damage to the power supply if the connected load voltage is higher than the output.
Thanks for making all these videos. Can I use a part of your videos (3-5)min with your voice and a link to your RU-vid video in order to make a reference in my RU-vid video in an Agilent 6612C troubleshooting and reverse engineering?
LOL, looks like the dust bunnies were busy reproducing inside that poor power supply. I have disassembled a lot of old lab type supplies before and I have to say I think that is the dirtiest I have ever seen.
Yeah, I was actually quite surprised to find out how dirty it was. Usually, this kind of equipment operates in a pretty clean environment even with extended use it would rarely become this dusty.
