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Wednesday, January 17, 2018

The 'CAT' (Category) rating on a multimeter relates to its capability to

The 'CAT' (Category) rating on a multimeter relates to its capability to:

  • Survive in tough environments
  • Reduce user hazards
  • Maintain high accuracy
  • Provide extended battery life 

 
The 'CAT' (Category) rating on a multimeter relates to its capability to

EXPLANATION

The Category rating, typically CAT I, II, III, IV etc, relates to the ability of the meter to avoid creating a safety hazard when subjected to a massive overload, as for example when inadvertently connected directly across a supply when on a current range. It does not necessarily imply that the meter will survive the abuse. Rather, that the result should not include user injury due to fire, insulation failure, arcing or bursting open of the case.

Budget meters sold for use on small electronic projects do not typically have the protection devices (Especially, high breaking-current fuses) fitted to meters intended for measurements on distribution boards, etc. Therefore anyone intending such work should choose a meter with a suitable CAT rating.

http://support.fluke.com/find-sales/download/asset/1263690_6116_eng_h_w.pdf

SOURCE

http://support.fluke.com/find-sales/download/asset/1263690_6116_eng_h_w.pdf
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