Dust In Pressurized Enclosure "Type Of Protection Ex P; Securing Plug-In Connections; Maintaining The Analyzer - Siemens SIPROCESS GA700 Compact Operating Instructions

7.2.4

Dust in pressurized enclosure "Type of protection Ex p"

Dust in pressurized enclosure "Type of protection Ex p"
Explosion hazard
The ignitable dust atmosphere inside the pressurized enclosure can lead to an explosion.
Before usage in dust atmospheres in Zones 21 and 22:
• Ensure that the interior of the device is completely dust-free.
• Remove the dust layers manually from the enclosure surface, for example by using a
Dust layers above 5 mm
Danger of explosion in hazardous areas.
A dust deposit with a thickness exceeding 5 mm can lead to overheating of the device and as
a consequence to explosion.
• Remove any dust layers in excess of 5 mm.
7.2.5

Securing plug-in connections

Note
Unstable plug-in connections
Plug-in connections without interlock can loosen and fall out. Operation with Ex py or Ex ec can
cause an ignition.
• Secure plug-in connections without interlock mechanically, for example, with a cable tie.
7.3

Maintaining the analyzer

After repair have the device checked by an Ex specialist before the device is put back into
operation. The Ex specialist determines whether the analyzer has the essential features and
meets the requirements for explosion protection and issues a certificate to this effect and/or has
attached a test symbol to the equipment.
Check the device annually for electrical safety and functionality as well as leakage of the sample
gas path within the device.
Check the device following each intervention in the gas path (containment system) for leaks.
The leak test is described in the section "Checking gas paths for leaks (Page 65)".
Devices in explosion-proof design
Compact Operating Instructions, 01/2022, A5E35134047-11
WARNING
compressed air gun. Cleaning by pre-purging is not permitted.
WARNING
Service and maintenance
7.3 Maintaining the analyzer
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