LCR meters ET4410, NJ300S - Page 1
Forum section: electronics / testgear

author: jheissjr
author_rank: Contributor
timestamp: January 14, 2025, 12:29:59 am
content: The LCR meters from East Tester and AAI look pretty good. Specs are good and price is only $200. The signal level goes down to 0.3V and they can do in circuit ESR and capacitance measurements. Owners of ET4410 get equal measurements as Agilent meters. However they have two differences – frequency and bias voltage. The East Tester does 100kHz and has 2V bias voltage for caps. The AAI does 300kHz but does not have bias voltage. Is 100kHz with 2V bias more useful than 300kHz without bias? What do you think of the meters?

author: Martin72
author_rank: Super Contributor
timestamp: January 14, 2025, 11:15:08 pm
content: Hi,I've had the ET4410 twice and an ET4510, so I know it a bit.The ET44/4510 are ideal for people who don't want to/can't spend much, but want more than a handheld LCR could offer.The workmanship is appropriate for the price, but it doesn't seem cheap.The accuracy with regard to the basic parameters is very good; the second parameters are to be treated with a little caution with increasing frequency.And that's where we come to the point where I have some skepticism about the second LCR meter.100kHz measure frequency is not easy to handle, and beyond that, above 100kHz, the measurement circuit must be more complex.This then affects the price, so without knowing the device, I don't think you can effectively use the 300kHz offered by the NJ300S.LCR meter with 300kHz measuring frequency. The best value for money is the ET3503 with an average price of around €1000; all other brands are significantly more expensive and cost several thousand euros.In that case, the $190 seems very daring.

author: indman
author_rank: Super Contributor
timestamp: January 15, 2025, 06:36:25 am
content: Here is a review of one of the owners of such a device, only NJ200S:"The device went on the shelf, did not live up to expectations. The interest was in plotting the graphs. It's not his element, in the 10-200kHz band with medium stepping it takes him over an hour per component to do it! And it doesn't always do it well.Also critical is the component connection, for frequencies above ~50kHz you can immediately forget about Kelvin clamps.Otherwise the device is conditionally good, requires understanding how it works and careful tuning. This device is not for everyone, but only for those who understand very well, including the mathematical processing of measurements. It's useless to the rest of us, they just won't be able to run it sanely."I will add that many owners of similar devices do not like the bad loud control buttons and a very colorful specific interface, which is bad for your eyesight. Another drawback is the lack of connection to a personal computer.

author: jheissjr
author_rank: Contributor
timestamp: January 16, 2025, 01:50:08 am
content: I looked into the NJx00S. What I found is --The business replies to emails.-The device has a real manual but needs to be translated.-The manual gives the impression it was designed by knowledgeable engineers.-It has proper fixtures for SMD.-It looks like a legitimate meter overall.Even a large cap on a Keysight can show strange readings. Maybe the reviewer had poor readings from the meter config or wiring. Or maybe the reviewer was right and the NJ is no good. The NJ manual shows sweeps running on a PC. Maybe the PC connection is a newer feature. User GrayCat owns a NJ100S and shared internal pictures.NJ100S picturesThe ET4410 is the same as a RuoShui 4090C. They are the same meters meaning they use the same PCBs and firmware and just have a different front face for branding.What do you mean having the ET4410 twice? Was one faulty? What was the reason to own three meters?

author: KungFuJosh
author_rank: Super Contributor
timestamp: January 16, 2025, 02:00:35 am
content: Quote from: jheissjr on January 16, 2025, 01:50:08 amThe readings shown on the Keysight in your photo are as expected. Page 19 of the datasheet:https://www.keysight.com/us/en/assets/7018-01355/data-sheets/5989-4435.pdfAt best, at those frequencies ~1kHz, you'll get 10% accuracy, and go much above that, and it's simply out of range.

author: jheissjr
author_rank: Contributor
timestamp: January 22, 2025, 06:01:02 am
content: Quote from: Martin72 on January 14, 2025, 11:15:08 pmDo you mean you went through two ET4410? Was one faulty? What was the reason for the ET4510 upgrade?

author: Martin72
author_rank: Super Contributor
timestamp: January 22, 2025, 09:47:16 am
content: Hi,Curiosity...

author: hve
author_rank: Regular Contributor
timestamp: February 18, 2025, 07:59:04 pm
content: I am shopping for an LCR meter,Was wondering about theET4410.. which is about 233 euro.. which would cover 95% of my needs ..Or the more overpowered EUCOL Digital LCR MeterU2832for 960 EUR... 0.05% 200KhzOr one could use the lightVNA64 for basic LCR component validation I would imagine, but is more cumbersome to setup..The ET4410 is well known I think, for specs on the U2832 follow this urlhttps://www.alibaba.com/product-detail/New-High-Performance-Digital-LCR-Meter_62007029553.htmlAny recommendations?