Safety instructions
VA 550 Ex / VA570 Ex English
V1.07
Page 5 of 10
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The manual and the Ex documentation must be observed, in particular the provisions for
sufficient potential equalization and grounding and surge protection.
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Opening the housing in the hazardous area is possible in strainless state after a waiting period
of at least 5 minutes after switching off. The electrical connection is to be performed only in
strainless state of the sensor. Each aperture that was open is with the tightening torques
conditions laid down in the instruction manual to be closed and locked.
•
The repair of the flameproof case of flow-/consumption sensor VA 550 Ex and VA 570 Ex
including the flameproof joints are not allowed.
•
The type of ignition protection depends on the proper selection and installation of the cable
glands and the plugs. All openings must be provided with appropriate cable glands or sealing
plugs for unused openings. Only in accordance with the standards EN 60079-0, EN 60079-1 and
EN 6009-31 with a separate EC-type examination certificate certified cable glands and sealing
plugs are allowed to use. These cable glands and sealing plugs must be certified at least for a
temperature range of -20 ° C to + 95 ° C. The uused cable glands and sealing plugs must have a
thread in the size M20x1,5.The
screw-in depth has to be min. 8mm
•
The appliance must be used exclusively with the appropriate cable glands for harmonized
cables. These must be suitable for an operating temperature range of -20 ° C to + 95 ° C.
