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EFHSS Questions and Answers - Question Q00768

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EFHSS - Questions & Answers - Testing - Q00768
Minimal temperature

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From: Date: 17 March 2005, 19:41 [GMT]
Subject: Minimal temperature

dear all: what is the minimal temperature of the chemical indicators - strips- and tapes - for steam & dry oven may response to? best regards.

From: Josy Holdener (Switzerland) Date: 21 March 2005, 07:45 [GMT]
Subject: Re: Minimal temperature

Dear

Chemical inicators should meet the requirements of relevant standards (e.g. EN 867, ISO 11140) and should be used only for the process specified by the manufacturer.

Process Indicators Criteria
Method	Temperature	Endpoint Reaction
Steam	121°C	2 min - 10 min
Steam	132°C - 135°C ± 3°C	20 sec - 2 min
Dry Heat	160°C ± 5°C	20 min - 40 min

Endpoint definition as defined by AANSI/AAMI:
The observable change specified by the manufacturer that occurs after the chemical indicator has been exposed to certain predefined physical conditions.

Kind regards
Josy Holdener

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