Biosystems EX CHEK Reference Manual - Certifications
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Certifications
The Ex Chek is a personal, portable, microprocessor controlled, single sensor gas detector. The
Ex Chek is designed to detect combustible gas.
The Ex Chek is Classified by Underwriters Laboratories, Inc. as to Intrinsic Safety for use in
Hazardous Locations Class I, Division I, Groups A, B, C, and D, Class II Groups, E, F, & G, and the
Canadian Standards Association for use in Hazardous Locations Class l Division I Groups A, B, C,
and D. Classification for intrinsic safety is based on tests conducted in explosive gas / air (21 %
Oxygen) mixtures only.
European Community (DEMKO Certificate number 99E.9933271X), EEx ia IIC T4 for instruments
powered using DEMKO approved alkaline batteries.
The Ex Chek is also CE-Marked (Conformité Européenne). The UL, CSA, and DEMKO
classifications marks indicate compliance with United States, Canadian, and European
Community requirements.
Signal Words
The following signal words, as defined by ANSI Z535.4-1998, are used in the Ex Chek Reference
Manual.
indicates an imminently hazardous situation which, if not avoided, will result
in death or serious injury.
indicates a potentially hazardous situation which, if not avoided, could result
in death or serious injury.
indicates a potentially hazardous situation, which if not avoided, may result
in moderate or minor injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if
not avoided, may result in property damage.