VDL (E3) 09/2019 Page 30/234
• Non-compliance with the admissible parameters for processing the respective material.
• Installation, testing, service or repair in the presence of solvents
• Material to be loaded remaining in the chamber after turning off.
• Loading non-approved solvents
• Incomplete ground connections for all system parts in the installation area
• Introduction of rust into the device
• Installation of replacement parts and use of accessories and operating resources not specified and
authorized by the manufacturer
• Structural changes to the chamber without a subsequent risk assessment by the operator's ATEX
representative
• Failure to observe the inspection and maintenance regulations (inspection before initial commission-
ing, recurring tests, inspection after maintenance or repairs, qualification of the tester)
• Commissioning after maintenance or repairs without passing the electrical safety test
• Commissioning after maintenance or repairs without passing the explosion protection test.
• Commissioning without correctly and completely grounding in accordance with the grounding plan
• Non-observance of traces of wear and tear, in particular rust
• Installation, startup, operation, maintenance or repair of the chamber in absence of a risk assessment
and operating instructions from the operator
• Deliberate or careless handling of the chamber during operation (except the permitted operation of the
controller).
• Bypassing or changing protective systems, operation of the chamber without the designated protective
systems
• Establishing or disconnecting an electrical connection in the presence of an explosive atmosphere
• Non-observance of messages regarding cleaning and disinfection of the chamber.
• Wiping the chamber with a dry cloth
• Spilling water or cleaning agent on the chamber, water penetrating into the chamber during operation,
cleaning or maintenance.
• Cleaning activity while the chamber is turned on.
• Operation of the chamber with a damaged housing or damaged power cord
• Continued operation of the chamber during an obvious malfunction
• Insertion of objects, particularly metallic objects, in louvers or other openings or slots on the chamber
• Human error (e.g. insufficient experience, qualification, stress, exhaustion, laziness)
To prevent these and other risks from incorrect operation, the operator shall issue operating instructions
(chap. 2.3). The operator is also recommended to create Standard Operating Procedures (SOPs) (chap.
2.6, certain example avoidance measures are provided here).
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