Products > Test Equipment
DC Load - I need some guidance
mvno_subscriber:
It shows 333mA regardless of range (3A/30A). But clearly, 333mV per amp. I guess that's ok then. Is such a weird scale common on these kinds of instruments?
nctnico:
--- Quote from: mvno_subscriber on June 16, 2024, 06:49:01 pm ---It shows 333mA regardless of range (3A/30A). But clearly, 333mV per amp. I guess that's ok then. Is such a weird scale common on these kinds of instruments?
--- End quote ---
0V to 10V is a common output range for monitoring / control purposes. But you can choose a custom probe attenuation factor to compensate on an oscilloscope. More advanced multimeters also allow to use math to scale a reading.
Martin72:
--- Quote from: 2N3055 on June 15, 2024, 11:08:04 pm ---I also have heard elkos and ceramic capacitors "sing" quite nicely...
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With ceramic capacitors, you can try to replace them with MIL types - under no circumstances should you blindly replace them with supposedly better film types.
"Singing" electrolytic capacitors:
Anyone who has always wondered why many (switching) power supplies have their electrolytic capacitors glued to a mostly white viscous mass, well this is the reason.
DaneLaw:
--- Quote from: mvno_subscriber on June 16, 2024, 12:11:16 pm ---
--- Quote from: DaneLaw on June 15, 2024, 11:12:45 pm ---Where did you purchase it from? did it seem new when it arrived (like you were the first unboxing it) if not, it could indicate that its solely this unit, and some other buyer has been there with a "no thx, you're going back" and the reseller is trying their luck to find it a new home.
Are the 4mm protruding input jacks on BK8550 of the 8mm grade with 2mm wall-thickness or is it the 6mm that are common on many power supplies with 1mm thickness?
On East Testers programmable loads, it looks to vary depending on wattage and could look like its the 6mm wide/1mm metalthickness on ET5420 (2ch 20A pr. channel / ET5411 1ch 500V/15A) while 8mm/2mm metal-thickness on the 40A load (ET5410). https://cdn.globalso.com/easttester-cn/fu3.jpg
BK8550/TH8401 does look good, kudos for both sense & 4mm input jacks at the front.
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I bought it from Elfa Distrelec. Funny you should mention if it had been a return item, I did wonder if it had been opened before when I unpackaged it, there was something.. but everything seemed well packed inside.
Regarding the banana jacks, I wasn't quite sure I understood the question, but with threads the outer diameter is 8mm (see pic). Feels pretty solid.
The knob that is screwed on also feels decent. Weighs in at 27g on my generic kitchen scale.
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Yes, the circumference of the 4mm socket.
6mm -4mm = 1mm sides.
8mm - 4mm = 2mm sides.
If its Elfa Distrelec Norway, then contact them and explain the whine-issue, and your concern if itis a brand-new unit, and you wanna return it for another..
One of the benefits of purchasing from local resellers.
mvno_subscriber:
A quick update: I contacted Elfa yesterday, and today they're sending a replacement unit.
This is why I always buy big things from local sellers, even though it sometimes is a bit more expensive (which, in today's world, it seldom is anyway).
Crossing my fingers the new unit is better. Will come back to this thread when I've installed the new one.
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