Hazardous Locations
Selected models of the vbSeries range have been approved by the Canadian Standards Association (CSA) for use in hazardous locations meeting this classification: Class I, Division 2, Groups A, B, C and D.
Those models are clearly identified with the CSA logo and a Hazardous Locations information panel. Models without those markings are NOT approved for operation in hazardous locations.
The Class I Division 2 classification is officially defined in the Canadian Electrical Code part 1, but can be summarized as:
A location in which volatile flammable gases or vapors are present but confined within closed systems from which they can escape only in case of accidental rupture or abnormal operation; or in which ignitable concentrations of gases are normally prevented by positive pressure or mechanical ventilation, and which might become hazardous through abnormal operation of the ventilation equipment.
The approval specifically covers use in the United States of America and also any other countries which recognize the CSA certification.
When using a certified vbSeries in a hazardous location, the installation must comply with the vbX Installation Control Drawing for Hazardous Locations, including all its foot-notes and warnings. This drawing, number CIL2100VBX, is shown below.
The vbX instrument will be supplied complete with appropriate sensors for use in Class I Division 2 environments. As indicated on the drawing, alternative sensors may be used, provided they are certified for use in these locations and their entity parameters meet the limits shown on the drawing.
Last Reviewed: 12 Jun 2009 Source: vbSeries Instrument Reference Guide revision 24 March 2009 Pages 8 & 9