After reading lots of posts about the DE-5000 and it's 4 wire alligator leads (vs. modified longer 4 wire leads which I haven't got around to making yet) vs various Kelvin clips vs 2 wire vs other LCR and some ESR meters, below are some tests of a 1 ohm Dale resistor.
Preliminary conclusion:
While 4 wire is (potentially/probably) superior to 2 wire (although with null you can make a case for 2 wire), my results don’t seem to be highly repeatable. Might be temperature changes, air movement, and very possibly how exactly the clips are connected, and maybe even how well the banana plugs are seated in the meter. Might also be that I have lousy Kelvin leads.
Net, net: nothing definitive, it's hard to get repeatable tests results; I have one more hopefully better set of Kelvin leads on the way.
Measurements in ohms:
1.021 DE-5500 with 4 wire standard alligator clips at 1kHz, 1.02 at 100Hz
1.022 DE-5500 with 4 wire standard alligator clips at 1kHz, 1.02 at 100Hz 2nd test
33465A setup - let connections for each test settle for 10 seconds, then started 3 min test and took average measurement.
Kelvin leads used with 33465A
Set #1 Black leads into one handle on each clip - most confidence, but it's mostly a hunch so far, nothing definitive
Set #2 Grey leads into one handle on each clip - least (not much) confidence
Set #3 Red leads into both handles, Black leads into both handles - confidence TBD
1.02010 33465A 4 wire Kelvin clips Set #1 (Black leads into one handle on each clip) 1st test (this test result is suspect due to next 3 tests getting very different results - but maybe it should be the best result since it is close to the DE-5000 results, in which case all 3 sets of cheap Kelvin leads are suspect)
1.01473 33465A 4 wire Kelvin clips Set #1 2nd test
1.01586 33465A 4 wire Kelvin clips Set #1 3rd test
1.01501 33465A 4 wire Kelvin clips Set #1 4th test
1.01697 33465A 4 wire Kelvin clips Set #2 (Gray leads into one handle on each clip) 1st test
1.01215 33465A 4 wire Kelvin clips Set #2 2nd test
1.01474 33465A 4 wire Kelvin clips Set #3 (Red leads into both handles, Black leads into both handles) 1st test
1.02210 33465A 4 wire Kelvin clips Set #3 2nd test
1.01579 33465A 4 wire (4 individual leads) 1st test
1.01048 33465A 4 wire (4 individual leads) 2nd test
1.06371 33465A 2 wire
The following handheld meter tests settled much faster than the 33465A.
Fluke 179 1.1
Aneng 8008 1.10
Radio Shack 22-812 1.0-1.1 (flutters somewhat)