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2 Safety
2.1 General sources of hazards
Pressure gauges are pressurized parts where failure can result in hazardous situations. The selection of pressure gauge
should be made in accordance with the rules set out in EN 837-2.
2.2 Use in accordance with intended purpose
The devices may only be used for the purpose intended by the manufacturer.
The intended use of the devices, determined by the manufacturer, is the direct indication of negative and positive
overpressures in potentially explosive atmospheres.
According to the Pressure Equipment Directive 2014/68/EU, the device is classified as pressure-maintaining equipment
without a safety function in accordance with Article 4(3) of the Directive.
When operating the device, care must be taken to ensure that the medium used is harmless to the selected device
material. Process media that exhibit changes in the state of aggregation within a range of application can influence the
functionality. Negative influences must be avoided for this reason. The process condition of these media must be within
the technical limits of the device.
Further technical data on the intended use are summarized in the product data sheet, see section 12.1 these instructions.
2.3 Operator’s responsibility
Instructions for the proper operation of the device must be observed. They are to be provided by the operator, the
respective qualified personnel for installation, maintenance and operation. Hazards due to magnetic fields, electrostatic
charges and leaking media due to improper connection of the device must be excluded. The device must be included in
the equipotential grounding within the system; this can be ensured by selecting electrically conductive seals.
The device must be taken out of operation and secured against unintentional operation if it must be assumed that safe
operation is no longer possible (see chapter 10, Faults).
Opening the device and performing technical modifications by the customer violate the explosion
protection approval and are not permitted.
The operational safety of the device and the manufacturer's warranty are only guaranteed if the device is used as
intended. The device design, as well as a possible housing filling, must be adapted to the medium and potentially
explosive atmosphere used in the plant. The limit values specified in the technical data must not be exceeded.
The safety instructions listed in this operating manual, existing national regulations for accident prevention and internal
work, operating and safety regulations must be observed by the operator. Furthermore, he is responsible for ensuring
that all prescribed maintenance, inspection and assembly work is carried out by authorized and qualified personnel.
The device is to be regarded as a pressure-maintaining part of a plant in a potentially explosive atmosphere. The
operator of this plant is obliged to carry out an ignition hazard analysis and a zone classification..
2.4 Staff qualifications (target group assessment)
The device may only be installed and commissioned by trained specialist personnel.
Specialized personnel are persons who are able to perform the work assigned to them due to their specialized training,
experience and knowledge of the country-specific regulations, applicable standards and guidelines. For explosion-
protected devices, the personnel must be trained or instructed or authorized to work on explosion-protected devices in
hazardous areas.
2.5 Signs/Safety markings
The device is provided with a label. The label shows the type designation, measuring range, serial number, year of
manufacture, certificate of approval number, filling medium, Ex marking (including X for special conditions of use),
electrical connection parameters and manufacturer.
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