Tests Of Technical Ventilation Systems, Gas Warning Devices, Inerting Devices, Devices, Protective Systems Or Safety, Control Or Regulating Devices, And Other Technical Devices For Explosion Protection; Inspection After Changes Requiring Review; Recurring Tests For The Explosive Safety Of The System - Binder VDL Series Operating Manual

7.4.2 Tests of technical ventilation systems, gas warning devices, inerting devices,
devices, protective systems or safety, control or regulating devices, and other
technical devices for explosion protection
Test content that has been checked and documented as part of conformity assessment procedures do
not need to be checked again. Verify the plausibility and completeness of documents.
The following points must generally be verified:
• Technical ventilation systems, gas warning devices, inerting devices with regard to their suitability,
their functionality, their interconnections, their installation conditions, their proper condition, and their
installation / assembly
• Devices, protective systems, or safety, control, or regulating devices within the meaning of Directive
2014/34/EU on explosion protection with regard to their proper condition, their suitability, their inter-
connections, their installation conditions, and their installation / assembly
• Safety, control, or regulating devices with relevance for explosion protection, which can also be lo-
cated outside the potentially explosive atmospheres, to determine whether ventilation systems, gas
warning devices, inerting devices ensure the proper exclusion of ignition sources and functionality.
• Calibration of the two Pt 100 temperature sensors (controller sensor / sensor of the temperature safety
device) and, if required, subsequent adjustement is to be made before commissioning the chamber as
well as part of the annual maintenance. The procedure is described in the Service manual (customer
version).
• Ex devices in the sense of TRGS 725, whether they ensure the necessary functional reliability of the
measures.
• Connection elements and other technical devices (such as lightning protection, requirements for
floors) with regard to their condition, their interconnections, and their installation / assembly for explo-
sion safety (e.g. type of installation, insulation resistance of electrical cables and lines)
• Take into account the significant interactions of devices, protective systems, safety, control, or regula-
ting devices and their connecting elements – with each other and with other system parts. This inclu-
des, for example, testing the equipotential bonding, the involvement of pipes in equipotential bonding,
overvoltage protection, and lightning protection, alignment of units (e.g. pump-coupling-motor).
7.5

Inspection after changes requiring review

There is a need for a change requiring review if the explosive safety of the explosive system is affected
by the change. Changes requiring review are evaluated in accordance with applicable national regulati-
ons (for Germany in particular: TRBS 1123). Checks after a change requiring review may be limited to the
changes made. Verify whether the system in the potentially explosive area has been changed in ac-
cordance with this regulation and is working properly. See the requirements in Chap. 7.4.
7.6

Recurring tests for the explosive safety of the system

Objective of testing: The recurring tests serve to maintain the explosive safety of the Ex system. Among
other things, the actual state of the system is compared with the target state (according to the explosion
protection document and available test records).
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