Products > Test Equipment
TH2830 vs TH2832
tv84:
--- Quote from: KungFuJosh on July 01, 2023, 08:27:15 pm ---Yup, hw ID is still the same.
--- End quote ---
SO, everything as expected. Your EEPROM/FRAM/whatever still has a HW version A7 but with that patched ST2832 FW, the Ax units behave as Cx units.
KungFuJosh:
--- Quote from: tv84 on July 01, 2023, 08:41:54 pm ---
--- Quote from: KungFuJosh on July 01, 2023, 08:27:15 pm ---Yup, hw ID is still the same.
--- End quote ---
SO, everything as expected. Your EEPROM/FRAM/whatever still has a HW version A7 but with that patched ST2832 FW, the Ax units behave as Cx units.
--- End quote ---
Yes, unfortunately, something else is wrong. I can't complete short correction (open does complete). However, if I activate the frequency function in the correction menu, I can compensate for specific frequencies. 20Hz to about 24Hz works (though starts to get odd), then 25Hz through 1.5kHz give odd numbers.
For example:
25Hz short = 216.839kΩ
30Hz short = 130.555kΩ
50Hz short = 342.603kΩ
2kHz short = -168.641Ω
100Hz short = 178.500kΩ
200Hz short = 851.517kΩ
500Hz short = 19.5998MΩ
2.50kHz short = -213.862Ω
After that, it gets pretty normal:
2.51kHz short = 0.00915Ω
3.00kHz short = 0.00058Ω
KungFuJosh:
Ummmm... Nevermind?
I reflashed ST2832 again, screwed around a lot more, and now it all works. 🤷
I think this fw has too many options or something. I was able to complete all the correction, and test high value caps again. 🤦
So I guess we're all good then!
tv84:
Maybe it needed a flash with 2832 settings already in...
KungFuJosh:
--- Quote from: tv84 on July 01, 2023, 09:52:42 pm ---Maybe it needed a flash with 2832 settings already in...
--- End quote ---
Yeah, that's the ticket, yeah!
I'm like 80% sure it was a PEBKAC error. The 2832 fw has a lot more options, and ranges for things I guess. Though I don't know why I couldn't do short correction regardless before changing any settings.
I changed the signal source impedance from the default 100 to 30Ω. I also experimented with the Range option on the test screen. I've never played with that, I don't know if it was changeable in the 2830. The pdf says Range is only Auto, Hold, but clearly this version has more, unless that's a different range option. 🙄 Or maybe the ST firmware is fancier than the TH firmware? Or, again, me confusing something.
Anyway, I dunno if I need to have it recalibrated or not, it's pretty close for the test caps I tried. I'm assuming I need to read a different manual now.
Comparison:
2830 ref:
4.69238nF, 4.64197Ω esr (Range Auto?)
925.025uF, 0.02938Ω esr
2.16287mF, 0.02186Ω esr
2832:
4.68818nF, 10.8833Ω esr (Range 10Ω? Or 30Ω, I forget)
929.669uF, 0.02645Ω esr
2.16549mF, 0.01554Ω esr
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