[SI-LIST] Re: In scope measurement, why is the amplifier of an
- From: steve weir <weirsi@xxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Thu, 17 Jul 2014 05:46:17 -0700
CAT I, II, III are industry voltage classes. If you value your life,
don't go near mains voltages with anything that is below CAT II, scope
or DMM. Equipment manufacturers determine what class they will meet.
Don't expect a pocket scope probe to do better than CAT I.
Steve.
On 7/16/2014 10:32 PM, Hal Murray wrote:
> 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?
>
--
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