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AN8008 US $19, 9999count, 1uV, 0.01uA, 0.01Ohm, 1pF resolution meter

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Fungus:

--- Quote from: stj on July 21, 2017, 03:56:38 pm ---fuses are only for reading current

--- End quote ---

That part's true.


--- Quote from: stj on July 21, 2017, 03:56:38 pm ---the CAT ratings are only for reading voltage.

*and i'm pretty sure they dont cover the ability to do something stupid like spining the rotary switch while the leads are hot.

--- End quote ---

This part? You made it up.

CAT ratings do cover doing stupid things like spining<sic> the rotary switch while the leads are hot.

alm:

--- Quote from: stj on July 21, 2017, 03:56:38 pm ---fuses are only for reading current, the CAT ratings are only for reading voltage.

*and i'm pretty sure they dont cover the ability to do something stupid like spining the rotary switch while the leads are hot.

--- End quote ---
Do you have a reference for your definite statement? IEC 61010-1 2nd edition is directly contradicting your statement (see attachment). I do not have access to the third edition, so feel free to post a quote if they relaxed that requirement. I do not believe the impulse voltage tests have to be applied at the current inputs, only the maximum rated voltage (i.e. 1000 V DC and AC in this case).

tronde:
alm:

What is the full title of the document you have?

I have found the general part of 61010-1, 3rd ed, but there are several parts.

http://www.china-gauges.com/download/IEC-61010-1-2010-06.html

alm:

--- Quote ---ANSI/ISA-61010-1 (82.02.01)
CSA C22.2 No. 1010.1
ANSI/UL 61010-1
Formerly ANSI/ISA-82.02.01-1999 (IEC 61010-1 Mod)

Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use Part 1: General requirements

[...]

This standard is based on IEC 61010-1, Second Edition (2001).

--- End quote ---

In the second edition, the test and measurement section was still part of 61010-1. In the third edition, it was moved to IEC 61010-2-030, so it would not be included in the document you linked. IEC 61010-2-033 may also be relevant.

Nusa:
In the case of the CAT markings on the AN8008, the ratings are clearly not claimed for the fused A/mA input jack, so there's no requirement for fuses to meet that rating. I think you're arguing about a moot point.

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