Products > Test Equipment

ET432 LCR Meter - Wild Results - Range Function?

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Tycho_Brahe:
I see you guys are posting your version numbers.  Does this mean we can update the firmware or we're just at the mercy of whenever we purchased the product?    I'm not finding any update files here:  https://www.easttester-cn.com/et430-handheld-new-compact-lcr-meter-product/

Veteran68:

--- Quote from: killingtime on January 23, 2024, 11:11:41 am ---If anyone has a different brand LCR hand held (Keysight or BK Precision) I'd be grateful if you would stick a 10K metal film on it and play with the range setting. That will tell us if it's worth spending about 3x for a different design.

--- End quote ---


--- Quote from: Veteran68 on January 23, 2024, 01:17:23 pm ---I'll try to remember to check with my Hantek 1833C tonight.

--- End quote ---

Results below in both 2W and 4W modes using the Hantek-supplied shorty croc leads and Kelvin clips with the slot connector. I recalibrated (open and short) between each probe type. Regardless of the manual range selected, the Hantek always displayed correctly as K ohms. The test frequency was at left 100Hz for these results, but I did try all the supported frequencies to see if it made a difference -- the reading didn't change between 100Hz and 10KHz, then creeped up ~10mOhm 10 Ohm between 40Khz and 100KHz. Overall, the 1833C tested as expected, with only the 100K manual range being significantly off. And nowhere near the cost of a Keysight or BK. :)

I also checked against my Agilent 34401A and Siglent SDM3065X 6.5 digit meters using the same ProbeMaster 8000 probes.

10K 1% Metal Film Resistor

Hantek 1833C - Croc leads 2W
AUTO 10.052K (stable)
10R 10.154K (moves)
100R 10.141K (moves)
1K 10.055K (stable)
10K 10.052K (stable)
100K 11.257K (stable)

Hantek 1833C - Kelvin leads 4W
AUTO 10.053K (stable)
10R 10.153K (moves)
100R 10.120K (moves)
1K 10.053K (stable)
10K 10.053K (stable)
100K 11.250K (stable)

Agilent 34401A - Probemaster 8000 2W
AUTO 010.0524K

Siglent SDM3065X - Probemaster 8000 2W
AUTO 10.05281K

EDIT: Corrected resistance creep value at high test frequencies

killingtime:
Thanks for the test results Veteran68.

So it looks like it's just an EastTester thing then.

If you look at the official factory page for this model below, they seem quite happy to showcase the meter displaying negative capacitances. That should have been a warning that there's still some work to do on the firmware. Sigh.

https://www.aliexpress.com/item/1005004656845323.html

Veteran68:
I'm generally not a fan of Hantek gear, but I have to say this 1833C LCR meter has been a pretty good one for my needs so far. I've been saying if I were buying another handheld I'd consider the Uni-T 622E or the Sanwa LCR700, but not really sure I'd need to.

I've been considering a step up to a bench LCR meter, but not one of the super expensive pro level ones. So that means the likes of the EastTester 44xx series and the RuoShui/Victor 40xx series in the $300-400 range. Based on what I've been hearing from EastTester reports lately, I'll probably steer clear of them. The RuoShui/Victor line looks like much the same hardware but seems to get better reviews, probably due to better QC and/or firmware.

Would love to have a Tonghui/Sourcetronic but can't justify spending that money for my hobby. It's not like a DMM that I'd use most every day.

killingtime:
Pulled out another line transformer to see if it's just inductors that the meter doesn't like.

Hooked the Xfmr up to mains and measured the primary current with the secondary unloaded. 0.4A rms, which yields 1.95H using XL=2(pi)FL @245V AC rms 50Hz. Measured using a Watt meter and my DDM on the 10A range. Both agreed.

ET432 readings below. AUTO gave the wrong reading at 0.528H. That's out by a factor of 3 at least The ESR looks way out as well. I did a DCR measurement and got 2.3 Ohms which agrees with my Fluke DMM. The 10K range is closest at 1.6H, but that's still a big error.

Hmm.


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