In the meantime I also got an answer on measuring 380V 3 phase and such: like expected: use two probes, and set the scope up in differential mode: invert B and sum with ch A.
What about if one channel is about hundreds of volts and the other millivolt - volts (voltage, current transformer for the current)?
This way you lose the most amazing feature of your scope: 'dual channel scope'.
I use this feature (because I have to) in 80% scope measurements. And I would like to give some examples:
- half bridge (LS, HS gate signals)
- full bridge (stepper motor), for phase, duty cycle, dead time
- SMPS primary vs secondary signals
- current vs voltage phase difference, power factor, inverters
- power transformers, three phase especially when other connections than delta, star used
I would not imagine my work without two isolated channels scope.
Some manufacturers offer a multimeter together with the scope and advertise it ambiguous as 'isolated inputs for multimeter and scope', when in fact the two scope channels are not isolated, but only against the multimeter inputs.
George, I *think* you missed the very reason for differential measurement: a grounded scope to measure threephase mains.
They are called Rosa, Sylvia, Tessa and Tina, You can find them https://www.linuxmint.com/
Dragon broken ? http://aplomb.nl/TechStuff/Dragon/Dragon.html for how-to-fix tips
I just can't swallow the idea of putting +400V to the BNC, whatever resistor divider is inside the probe.
Active differential probe should solve the isolation problem with no extra fuss. I'm off shopping soon...
I have put together a table to compare all the different digital oscilloscope for hobbyists: http://www.gabotronics.com/resources/hobbyists-oscilloscopes.htm
The table is sortable, let me know what you think. If I find more scopes I will add them.
Ganzziani: Is there a price limit for what's included in this table? High on my list, when I decide to replace my Tek 2235, will be:
GW Instek GDS-1102A
These are a bit more expensive than any of the scopes in your table, but on the other hand, even as a hobbyist, I wouldn't seriously consider any scope under 100 MHz.
Yes, I am only including scopes under $500.
I have a dS2090 which you list at $299 but I paid less than half that by buying direct from China distributor. Including shipping.
Very pleased with it for my occasional use of a DSO.
do you know where I can buy a new Rigol DS1052E in Orlando, Florida?
I bought my used Tek 465 at Skycraft, corner I-4 and Fairbanks.
Imagecraft compiler user
© 2020 Microchip Technology Inc.