Electronics > Beginners
Oscilloscope for AC work ?
joeqsmith:
They certainly do make equipment just for this purpose. The one I use can measure all three phases, both current and voltage plus a spare channel. I would recommend you talk with some of the sales reps and have them bring in there systems for a demo.
Several companies offer them with various features depending what you need. For example:
https://www.testequity.com/products/33042/
Benta:
--- Quote from: bdunham7 on May 04, 2019, 12:30:18 am ---Second, why do you dismiss battery operated scopes? A proper one is as safe as a proper DMM, and if you showed up as an electrician to work in a panel with anything else you'd be thrown out.
--- End quote ---
No it's not.
Hint: look at the connectors:
DMM: fully shrouded with properly isolated test leads.
'Scope: exposed BNC and (thin) probe cables with insufficient insulation.
Generally: Do not let your test equipment carry mains voltage unless it's specifically designed for it.
SND:
Thanks for all the replies.
I'm currently considering the AEMC 407 clamp meter, with their free bluetooth software it might get me close enough to what I'm trying to find, at least it has some THD functions. I'm not 100% sure it'll get to the higher frequencies that might be in there but for a bit over $500 could be worth a try.
DDunfield:
--- Quote from: Benta on May 04, 2019, 11:22:06 am ---
--- Quote from: bdunham7 on May 04, 2019, 12:30:18 am ---Second, why do you dismiss battery operated scopes? A proper one is as safe as a proper DMM, and if you showed up as an electrician to work in a panel with anything else you'd be thrown out.
--- End quote ---
No it's not.
Hint: look at the connectors:
--- End quote ---
Yes it is.
Hint: look at the connectors!
Discussing a "proper" battery powered scope (Scopemeter) ... Like a Fluke, not DSO-xxx hobby class rubbish.
My Fluke has the inputs (including the BNC's) insulated so that you cannot contact metal, even on an unconnected BNC socket. The probes are fully insulated, no metal of the BNC is exposed.
Bare input on the scope is rated max. 300v (4kv surge). With the standard 10x probe, it's rated 600v (6kv surge).
HV probes are available which are rated for many kv - Highest input range in scope mode, configured with a 1000x HV probe is 100kv!
And, yes .. I agree, if you showed up to my building planning to look at my 3 phase mains, or VFD outputs with a typical bench scope, I'd send you packing.
Dave
rsjsouza:
--- Quote from: DDunfield on May 04, 2019, 11:58:41 am ---
--- Quote from: Benta on May 04, 2019, 11:22:06 am ---
--- Quote from: bdunham7 on May 04, 2019, 12:30:18 am ---Second, why do you dismiss battery operated scopes? A proper one is as safe as a proper DMM, and if you showed up as an electrician to work in a panel with anything else you'd be thrown out.
--- End quote ---
No it's not.
Hint: look at the connectors:
--- End quote ---
Yes it is.
Hint: look at the connectors!
--- End quote ---
Exactly: :-+
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