| Products > Test Equipment |
| TH2830 vs TH2832 |
| << < (71/74) > >> |
| GnomeZA:
--- Quote from: Martin72 on January 17, 2024, 11:54:43 pm ---"Today" I got the new firmware for our ST2830 from Sourcetronic (the guy asked me if I knew about the new firmware through a certain "Josh"... ;) ). I then asked again what exactly had been changed, the question was passed on and I may get an answer soon (which I will then post here). This is interesting because I have to pay attention to the calibration. --- End quote --- Any chance you could also share this ST2830 firmware Martin? I think having both is not per-se a bad thing |
| Martin72:
Hi, No problem - tomorrow.. |
| Martin72:
A little late, but not forgotten... ;) https://drive.google.com/file/d/1VnfhRBVc8n2ndyWcnriZIla9GFPnQXkD/view?usp=sharing |
| KungFuJosh:
One of my contacts at Sourcetronic was kind enough to share how to do the Dissipation Factor test. He said: --- Quote ---For the D test, Cs-D fundamentally has the same information as Cs-Rs, as the loss factor is directly connected to the ESR Rs. That also means that you can fake the D by putting actual resistors in series to the capacitor, and you get different sizes of D depending on the resistance you put up. --- End quote --- So I tried it out, and it works. I threw different value resistors in series, and it gave DF values similar to what was expected using math (eww, gross)...just kidding, I used a calculator. 🤣 Measured Rs of the cap was about 29Ω at 1kHz. So using some standard R values, I can do something like this: 29Ω = 0.00018 (cap only) 79Ω = 0.00049 (29Ω + 50Ω) 162Ω = 0.00101 (29Ω + 133Ω) 797Ω = 0.00506 (29Ω + 768Ω) 1609Ω = 0.01010 (29Ω + 1.58k) 16029Ω = 0.10071 (29Ω + 16k) 160029Ω = 1.00530 (29Ω + 160k) I'm sure those numbers aren't perfectly accurate, but they should be close enough to test it on a new test board. 😉 Thanks, Josh PS. Abbreviating Dissipation or Dissipation Factor as just D, leaves some hilarious statements out of context. |
| KungFuJosh:
Here's an update on the Dissipation Factor test values. Tested at 1kHz: 1nF cap (no series resistor) -> 0.00010 50Ω (actually 49.9) -> 0.00050 133Ω -> 0.00100 768Ω -> 0.00500 1.58 kΩ -> 0.01000 16 kΩ -> 0.10000 160 kΩ -> 1.00000 Those values are pretty spot on for the cap I used. I used Panasonic 0.1% 25ppm SMT resistors. Thanks, Josh |
| Navigation |
| Message Index |
| Next page |
| Previous page |