[SI-LIST] Re: In scope measurement, why is the amplifier of an
- From: "Rob Oglesbee" <roglesbee@xxxxxxxxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Thu, 17 Jul 2014 08:19:42 -0400
Scopes fall under IEC 61010-1 and IEC 61010-2-030, which call out creepage
and clearance distances for specific voltage levels. A scope usually needs
to be rated to CAT II 300V due to its typical usage, but you have to read
the manual. Here is a good but slightly dated overview...
http://www.ni.com/white-paper/5019/en/
Regards,
Rob Oglesbee
Radian Research
(765) 449-5505
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-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Hal Murray
Sent: Thursday, July 17, 2014 1:32 AM
To: si-list@xxxxxxxxxxxxx
Cc: Hal Murray
Subject: [SI-LIST] Re: In scope measurement, why is the amplifier of an
steve weir said:
> Blame it on CAT II safety. In order to avoid injuring or killing the
probe
> user lots of clearance is required between the probe tip and the scope
> return ground. The space increases the size of the induction loop
compared
> to low voltage active probes, or a transmission line probe AKA resistor
> probe.
Is "CAT II" something from OSHA or an industry group?
Who decides what level of safety a scope probe has to meet?
--
These are my opinions. I hate spam.
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