Hazardous Area Operation
Introduction
Thermo Fisher Scientific
Prima PRO & Sentinel PRO Mass Spectrometers User Guide
A-3
Before starting work, check with the appropriate site authority.
Permits to carry out live or hot work in the hazardous area may
be required.
Work must be carried out by suitably trained personnel.
Before opening any electrical enclosures or using any electrical
test equipment (test meter, laptop computer, etc.), ensure that the
area has been verified as currently non hazardous. Continuous
monitoring may be required.
Do not attempt to adjust any purge pressures, flow rates, or
pressure set points unless appropriate test equipment is available.
These have all been factory preset to give a safe operating
condition.
Never use purge flow rates or timings other than those specified
on the instrument label or in this document.
Do not attempt to modify the purge control equipment in any
way. Doing so will void hazardous area certifications. If there is
any evidence of modifications, the person on site with overall
responsibility for hazardous area safety must be informed,
preferably in writing. The factory should also be consulted.
Do not modify any part of the purged enclosure or the apparatus
within the enclosure without first contacting the factory for
written authorization because:
a.
There are other features of the system that are required for
safe hazardous area operation over and above the enclosure
purge.
b.
It cannot be assumed that any item of safe area electrical
apparatus can be safely used in the purged enclosure.
Modifications could invalidate any hazardous area
certifications and make the system unsafe.
When carrying out any work that involves breaking the analyser
vacuum system, ensure that the area is verified safe for the entire
duration that the vacuum system is open. This is necessary so as
to avoid trapping hazardous gas inside the vacuum system that
could be ignited on startup.
On completion of any work, ensure that where appropriate the
system is returned to full purge protected condition (i.e. not in
“override”). Ensure that covers are replaced on all electrical
enclosures.
General
Hazardous Area
Work
Commissioning
and Maintenance
