Explosion Protection Systems Of Swg100Bio-Ex; Electrical Components; Ip 65 Cabinet - mru SWG100 BIO-EX User Manual

MRU GmbH
5.

Explosion protection systems of SWG100BIO-EX

The explosion protection of SWG100 Bio-EX is based on the nA and nC type of
protection as indicated in the ATEX declaration. Following aspects have to be followed.
Any action not in line with the guidelines below may violate the explosion protection of
the SWG100 BIO-Ex and may results in danger and explosion hazard

5.1. Electrical components

All components in the SWG100 BIO-EX are selected and qualified to meet the
requirements of the given type of protection (nA or nC). Make sure that any change to
the instrument during it's life time are in line with the requirements of this type of
protection. No change to the wiring or change of components are allowed without prior
information about the impact on the type of protection of these changes. Always ask
feedback of MRU for the intended changes.

5.2. IP 65 cabinet

The SWG100BIO-Ex. has an IP 65 cabinet. The cabinet prevents explosive gases and dust
to penetrate inside. Prevention from dust is a basic requirement to the type of
protection. Therefore, it is required to always operate the instrument with the door
being closed. Perform a visual inspection in regular time intervals to verify the housing
and the seals of the door and window are not damaged.
The following chapter explains with which protection
systems the SWG100BIO-Ex. is equipped. If one of the
explained protection systems is triggered, the user must
do the following actions to prevent an ignition inside the
analyser cabinet.
• Only staffs with a "hot permit" are allowed to
restart the analyser in service.
• The staff must have a certified flammable gas
detector to monitor the ambient atmosphere.
• The cabinet door shall not be opened by force in
order to prevent ignition sparks.
• The entire cabinet must be checked for absence
of flammable gas with a certified combustible gas
detector.
• It is not allowed to restart the analyser in service,
until the cause of system alarm is remedied.
• Exchange disconnected flexible tubes. Never use
exhausted tubes again.
SWG 100 BIO Ex User Manual
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