Products > Test Equipment
Der EE DE-5000 Unboxing and Teardown
Hexley:
--- Quote from: JDW on January 05, 2021, 09:48:03 am ---You can buy gold-plated Kelvin clips on Amazon (USA) for a very reasonable price right now:
https://amzn.to/2Xf1lXC
(Amazon Affiliate paid link)
--- End quote ---
I used those "Atoplee" probes from Amazon on a recent rework of my DE-5000's TL-21 leads. Worked well. One note, though, is that one of the BNC connectors was a dead short from signal to shield. If you were planning to use these leads for a BNC-connected LCR meter, that could pose a problem.
It did not affect my DE-5000 mod, since the BNCs were removed when the Kelvin leads were soldered into the TL21 housing. But when I used those removed BNCs for other purposes, I discovered the issue. Probably not a common fault, but maybe worth checking if you buy a set.
Yuriy V.:
Has anyone done replacing the blue LED backlight with orange or yellow? What size LEDs is needed for this?
ranchero:
I'm using DE-5000 for measuring relatively small smd inductors (~40nH - 200 nH), always used 100kHz for that. Using TL-21 clip and soldering component to the small test board (getting old so hard for me to measure 0402 smd without soldering it first). Had mixed feelings as measured inductance was quite off (higher) comparing to nominal value of known inductors. Yesterday I've noticed that if I change frequency to 10kHz, reading is by far more accurate even though less stable. For example, 0402 smd inductor with 150 nH nominal value measured as ~220...225nH at 100kHz, but at 10kHz it's measured as 0.14...0.17uH (not stable). Same result with MANY other inductors tested.
Can anyone explain? My DE-5000 is faulty? Or there's other reason for that?
What are other inexpensive options (if any) accurate measuring of small inductors?
Martin72:
Hi,
--- Quote ---For example, 0402 smd inductor with 150 nH nominal value measured as ~220...225nH at 100kHz, but at 10kHz it's measured as 0.14...0.17uH (not stable).
--- End quote ---
The testfrequencies are ways off from that what the inductance are used for.
Check the datasheet, on which frequency the value refers.
ranchero:
--- Quote from: Martin72 on March 11, 2021, 10:37:48 pm ---
The testfrequencies are ways off from that what the inductance are used for.
Check the datasheet, on which frequency the value refers.
--- End quote ---
Hmmm...Maybe I'm getting too old and started to lose what I've learned in university decades ago. But I found this and it's kind of correlates with what I was thinking. I need to measure inductance, not inductive reactance.
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