Appendix A Hazardous Area Operation; Introduction - Thermo Scientific Prima PRO User Manual

Introduction

Thermo Fisher Scientific
Appendix A
Hazardous Area Operation
A hazardous area is defined as an area where there is a risk of fire or
explosion due to ignition of flammable gases, vapours, dusts, or
fibres. Due to this risk, it is not possible to use standard electrical
equipment in such an area without providing some form of additional
protection to prevent ignition.
This manual covers operation of the explosion protection features of
the Prima PRO Ex and Sentinel PRO Ex systems. These instruments
are essentially safe area systems. Explosion protection is achieved by
pressurizing and purging the instrument enclosure to prevent ingress
and build-up of flammable gas. The purge control equipment and any
electrical apparatus outside the purged envelope (e.g. mechanical
pumps) are protected by other methods as outlined below. Detailed
operation of the purge control equipment used on a particular system
is given in the respective manuals for that equipment, and these
should be read in conjunction with this manual.
Warning!
The specific points raised in this section should be carefully

noted before carrying out any installation, commissioning,
maintenance, troubleshooting, or upgrade work on an Ex
system. This applies to ALL aspects of the work to be carried
out, not just with regard to the hazardous area specific parts.
These points should be applied in addition to any national or

local site regulations.
Failure to comply has the potential to cause a major site hazard.

Caution!
There are other safety considerations related to working on

Prima PRO and Sentinel PRO instrumentation regardless of
the nature of the operating environment (safe or hazardous).
Specific safety issues are highlighted and covered in other

chapters of this manual and should be taken into account in
addition to any points raised below.
Prima PRO & Sentinel PRO Mass Spectrometers User Guide A-1