| Products > Test Equipment |
| TH2830 vs TH2832 |
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| mawyatt:
One of the keys in measurements of low impedance DUTs shows in the Vm reading on the screen at 1.96mV. That's a small voltage to resolve accurately, and especially sensitive to the method and fixture utilized as well as the the Short Calibration. Repeatability is another potential issue, if one can get reasonably close readings at different times with reassembled setups for a stable given DUT. Anyway, looks like you've got your enabled TH2832 working well. What's the latest on the enablement, were you able to resolve the various issues? Best, |
| KungFuJosh:
--- Quote from: mawyatt on August 22, 2023, 02:12:57 pm ---Anyway, looks like you've got your enabled TH2832 working well. What's the latest on the enablement, were you able to resolve the various issues? --- End quote --- In general, it's been great with the 2021 ST2832 firmware. I have a couple errors listed above in reply 258. 700mH inductor reading is bad, and 100Ω DCR is a bug, and comes back not a number (nanKΩ). High frequency 100KΩ is also out of spec. At 1kHZ it's 100.053, but by 100kHz it's 97.8953, then at 200kHz it drops to 86.0723. The ST guys have been having trouble getting TH to do anything about it though. There's also one dumb thing they should fix- it says CELAR RAM instead of CLEAR RAM lol. |
| oz2cpu:
did they ever fix DC ohm, to actually measure at ZERO HZ ?!?! |
| KungFuJosh:
--- Quote from: oz2cpu on August 22, 2023, 03:14:07 pm ---did they ever fix DC ohm, to actually measure at ZERO HZ ?!?! --- End quote --- I dunno. I tested DCR on two frequency counters and my scope, and they all say about 12Hz. That's tested with the kelvin leads. Edit: I just ran a coax cable directly to the LCR, and it gets the same ~12Hz. Tested with coax to the scope, same deal (attached) though 11.36Hz was more common than the jump to 13Hz that made me average it to 12Hz. 🤷 |
| mawyatt:
--- Quote from: oz2cpu on August 22, 2023, 03:14:07 pm ---did they ever fix DC ohm, to actually measure at ZERO HZ ?!?! --- End quote --- This might be a "DC" measurement but with flipping the polarity to remove thermal EMF and other offsets, so the 12Hz would be the flipping rate, but I'm not sure about this. Might take a look later. Best, |
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