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| ANENG AN8001, 6000 count true RMS Multimeter for $14. |
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| ModemHead:
--- Quote from: WhichEnt2 on September 12, 2017, 01:39:48 pm --- --- Quote from: ModemHead on September 12, 2017, 12:46:43 pm ---The new set and the old set measure 62 and 65 mOhms, respectively, so I have no reason to suspect the copper and the connections. --- End quote --- Thanks for sharing the measurement results. About a week ago I measure one pair of $9.58 Fluke TL71 chinese test leads with XJW-01. 25 mOhm with kelvin clips directly applied. --- End quote --- I guess I should note that my measurements were with an HP34401A in 2-wire mode, both leads together, with the tips securely shorted by two tip jacks joined with 12ga copper. |
| WhichEnt2:
As far as I know any common methodic for measuring resistance of test leads is not exist. |
| Fungus:
--- Quote from: WhichEnt2 on September 12, 2017, 02:47:27 pm ---As far as I know any common methodic for measuring resistance of test leads is not exist. --- End quote --- https://en.wikipedia.org/wiki/Four-terminal_sensing |
| WhichEnt2:
--- Quote from: Fungus on September 12, 2017, 03:01:04 pm --- --- Quote from: WhichEnt2 on September 12, 2017, 02:47:27 pm ---As far as I know any common methodic for measuring resistance of test leads is not exist. --- End quote --- https://en.wikipedia.org/wiki/Four-terminal_sensing --- End quote --- Do you have any links that may provide some information in a few steps above an entry level? Specific measurement procedures, for example. |
| Fungus:
--- Quote from: WhichEnt2 on September 12, 2017, 03:07:32 pm --- --- Quote from: Fungus on September 12, 2017, 03:01:04 pm --- --- Quote from: WhichEnt2 on September 12, 2017, 02:47:27 pm ---As far as I know any common methodic for measuring resistance of test leads is not exist. --- End quote --- https://en.wikipedia.org/wiki/Four-terminal_sensing --- End quote --- Do you have any links that may provide some information in a few steps above an entry level? Specific measurement procedures, for example. --- End quote --- It's just Ohm's Law. You pass a current though the lead (eg. with a current-limited power supply) and simultaneously measure: a) The voltage drop across the lead b) The amps passing through it You can do it with two handheld multimeters. This measurement technique is the reason why we say "one multimeter isn't enough". (well, one of the reasons we say that) |
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