| General > General Technical Chat |
| Would you buy a precision µ/mOhm DMM adapter? |
| (1/4) > >> |
| Shay:
You're scrolling online, and you see a precision µOhm/mOhm DMM adapter. You click on it, and see the following: It has 3 ranges = 0.010A, 0.100A and 1.000A. All DC. It also has 4 wire Kelvin, with the DMM as the measuring device. Also A dip socket for the DUT, not just binding posts. The 1A range allows you to measure very small resistances, in the µOhm range, by applying 1A across the terminals, and then you connect your DMM into the output of the adapter, and measure the voltage. (R = V (dmm) / I (range)) The other ranges are the same idea, just for higher resistances. Assume about 1% accuracy for the adapter itself, and good build quality, with good components (AZ OP), an over-resistance indicator, and single AA battery, used for powering the whole thing! The cost is about 40$-30$. it comes with silicone kelvin clips. Would you buy it? |
| shapirus:
Yes, if it measures in DC mode. If it's AC, then no, because I have a TR-1035. |
| richnormand:
Might be useful to locate shorts on a pcb? |
| Shay:
--- Quote from: richnormand on March 11, 2023, 09:00:37 pm ---Might be useful to locate shorts on a pcb? --- End quote --- Yes, that is indeed quite a common use. However contact resistance has to be low, else you'll get high measurements because of bad contacts. |
| shapirus:
--- Quote from: richnormand on March 11, 2023, 09:00:37 pm ---Might be useful to locate shorts on a pcb? --- End quote --- But this is something that can be done with a regular DMM. What's the benefit of using an additional device for it? |
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