| Products > Test Equipment |
| Measuring ~ 400V on oscope - 10:1 OK or differential probes ? |
| << < (3/5) > >> |
| DavidAlfa:
--- Quote from: Fungus on October 31, 2023, 07:46:09 pm ---x10 should be fine in theory but make 100% sure that the fiddly little switch is in the x10 position. --- End quote --- When measuring voltages that could damage the input, I take no risks, I fix it in place with 2 turns of tape! It's easy to overlook that detail, also some probes have weak switches, too easy to move while handling it. Like trying to insert the clip... "click" -Ahhh! Better safe than sorry! |
| KungFuJosh:
He edited his comment out, but he previously mentioned using fixed 10X 600V ProbeMaster probes. He's fine. |
| TomKatt:
Actually, my ProbeMaster set is 1X/10X. I'm probably one of the minority that frequently uses 1X for low impedance power measurements. I do pay special attention to that, and fortunately the ProbeMaster design is such that the small switch is quite stiff and not easily moved by mistake - you really need to intentionally move it. The switch also has a center ground position between 1X and 10X, so if it does move it's most likely to just provide no signal at all. Thanks everyone for the input! |
| tggzzz:
--- Quote from: TomKatt on November 01, 2023, 12:22:34 pm ---Actually, my ProbeMaster set is 1X/10X. I'm probably one of the minority that frequently uses 1X for low impedance power measurements. I do pay special attention to that, and fortunately the ProbeMaster design is such that the small switch is quite stiff and not easily moved by mistake - you really need to intentionally move it. The switch also has a center ground position between 1X and 10X, so if it does move it's most likely to just provide no signal at all. --- End quote --- ... until you forget to check, and bugger your nice new shiny toy. If you never forget to check, you are a better technician than I am. ... until something slips, etc. You don't mention the frequency and risetime of the signals that will be on the high voltages. Be very careful to verify that they won't exceed the probe's rating, and melt the probe. If the probe datasheet doesn't have a V-vs-f derating graph, be suspicious. Personally I'd invest in a HV differential probe, so I could have peace of mind. |
| Fungus:
--- Quote from: TomKatt on November 01, 2023, 12:22:34 pm ---I do pay special attention to that, and fortunately the ProbeMaster design is such that the small switch is quite stiff and not easily moved by mistake - you really need to intentionally move it. --- End quote --- Re-check it after you've had visitors. Or every time you pick it up if there's children around. :) |
| Navigation |
| Message Index |
| Next page |
| Previous page |