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Equipment listed in IEE category 1 and 2 must be complaint because they have no real time clock chip, crystal or battery. Is this true?

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Equipment listed in IEE category 1 and 2 must be complaint because they have no real time clock chip, crystal or battery. Is this true?

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This question refers to microchip controlled ‘smart sensors’, such as modern fire detectors. Some smart sensors do actually know the time and date for recording information, but do not make decisions based upon it, so in the general case the above statement is true.

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