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2. Safety
Suitability for use
Pressure measurement independent of fluctuations in the atmospheric
„
pressure
For gaseous, liquid and aggressive media, also in aggressive environments
„
EN
Monitoring of condensation pressures and determination of vapour pressure in
„
liquids
E.g. monitoring of vacuum pumps
„
E.g. control of vacuum packaging machines
„
2.2 Responsibility of the operator
The legibility of the marking must be observed during time in use but at least
during inspection periods of three years. If any harm of the legibility is found
please contact the manufacturer to renew the marking.
For the safety of the system, the operator is obliged to carry out an ignition source
and ignition hazard analysis. Refer to chapter 2.3 "Ignition hazards".
The responsibility for classification of zones lies with the plant manager and not
the manufacturer/supplier of the equipment.
2.3 Ignition hazards
Relevant identified
ignition hazards
Hot surfaces
Mechanically generated
sparks and hot surfaces
Stray electric currents,
cathodic corrosion
protection
Static electricity
6
Implemented protective measures
The actual surface temperature depends on the
■
application, i.e. on the medium temperature
Temperature range marking; T range marking
■
Observation of legibility of marking
■
→ See chapter 2.6 "Labelling / safety marks"
Low contact speed
■
Restriction of vibration
■
Selection of suitable materials
■
→ See chapter 2.7 "Special conditions for safe use
(X conditions)"
Grounding via process connection required
■
→ See chapter 2.7 "Special conditions for safe use
(X conditions)"
No propagating brush discharge
■
All conductive parts bonded
■
Limitation of projected area of non-conductive parts
■
Limitation of layer thickness of non-conductive parts
■
Grounding via process connection required
■
Description of cleaning process
■
→ See chapter 2.7 "Special conditions for safe use
(X conditions)"
WIKA operating instructions pressure gauge model 5 per ATEX
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