QW-MS305D DC Power Supply 30v 5A Supply
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- Опубліковано 3 жов 2024
- This is a modern, high precision, DC switching supply. It provides constant voltage and constant current modes, 0 to 5 amp / 0 to 30v adjustable outputs, with corresponding LED readouts. It provides over voltage, over temperature, and short-circuit protection. It provides readout of current to the hundredths of an amp and voltage to the tenth of a volt. It has course and fine adjustment controls for current and voltage adjustments. An excellent general purpose lab bench unit.
Thanks for the video! I just inherited one of these but it is dead (no display, no output). Would you happen to know where the fuse is located? Thanks in advance.
Fortunately it was only a poor power cord connection (solved by bending the power supply's prongs). The connection felt snug but apparently not all three prongs were touching. The fuse is just below the power prongs but I have no idea if the fuse is removable or if the whole power connector would have to be replaced.
Gr8 video...have you information where to purchase the variable load please?
Cheers
Ebay has them for roughly $30 to $50.
I bought one of these a few years ago. While it does regulate well, it's output is incredibly 'noisy', and hardly 'laboratory grade". Have a look on a CRO and you will see massive switching spikes. I use it to run a 12V pump, or charge a car battery., nothing more.
Dear Sir, in reference to an older video of yours on the HP5314A Universal Frequency Counter. I would like to ask if you know what the secondary output voltage is on the main power supply. I purchased one and the transformer broke off in transport and Keysight/Agilent have no reference or part number for a replacement. If I could find out the correct transformer output I may be able to track down a replacement. Thanks.
Well, the manual says it was an HP 9100-4129 The power supply puts out a regulated 5v and an unregulated 8 to 10v to charge batteries (if your meter is so equiped). It is a center tapped transformer. I did not see the exact unit for sale. A 110v to 16v CT unit (provides 8v-0-8v) rated about an amp of output, should do it.. However, you would have to be crafty about mounting it and wiring it. I saw one for about $25 on ebay. I will not be held responsible for what you do either. Good Luck!
@@bap8guy Thanks so much for the reply. From what I could make out from the schematic, the secondary output pins are 7 & 9. Pin 8 the CT goes to ground. I didn’t know what voltage was across the capacitor C1 Please for give me as I’m still trying to learn electronics. Thanks.
Hello sir. I just got one of these second hand but it did not come with a manual or the cables. I think I've been able to find the manual, but do you know what cables I should buy for it? I see several different types listed in both eBay and Amazon, but I want to make sure I purchase the right ones. I'll mostly be using this for hobby activities (rust cleaning, nickel plating and such). Thank you.