Explosion-protection relevant information
14 - EN
VA Master FAM540
CI/FAM540-X1
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4 Explosion-protection relevant information
Important
Please refer to the operating instructions or the data sheet for the electrical connection data,
temperature data and classes to the Ex-codings as well as the approved installation sites.
4.1
Basic requirements
Follow the operating instructions to ensure proper installation. The relevant operating
instructions for the meter contain all installation and safety instructions. The icon on the model
plate indicates the following:
To ensure proper operation, comply with the supplementary safety
information in the operating instructions and certificates.
Depending on the application, operators must comply with relevant national installation
specifications (e.g., NEC, CEC, ATEX137, IEC60079-14, etc.).
Important
• For explosion-proof devices, remove the safety locking device when opening the cover and
reattach it after closing the housing!
• The max. ambient temperature for use with combustible dusts (category II 2D) is always
T
Amb
= +60 °C.
• After switching off the power supply, wait t > 2 minutes before opening the converter
housing. Observe the "DELAY BEFORE OPENING > 2 MINUTES" warning message on
the housing cover.
• When commissioning the flowmeter, refer to EN50281-1-2 regarding use in areas with
combustible dusts.
• For Ex devices in PTFE design, the minimum conductivity of the medium must be > 10
-8
S/m.
• When selecting the medium, take into consideration the chemical resistance of the
materials for the meter housing, the liner and the gaskets for the process connection.
• If zone 0 is present in the metering tube, the meters may only be installed in an area close
by to ensure sufficient ventilation of zone 1.
• Variable area flowmeters used in accordance with maximum electrical values for a
category 3 device (zone 2) can also be used without modification as category 2 devices in
an explosion-proof zone 1.
• Use only a damp cloth to clean the window in order to avoid electrostatic charging.
• For information about installation conditions for thermal insulation, see chapter Operating
conditions, page 10 .
• Use slow opening valves.
• Comply with installation conditions as per VDI/VDE 3513.
• Avoid gas inclusions when using the meter with fluids.
• Avoid pulsating flow. A float damper is available as an option.
• Avoid gas impurities (see Federal Institute for Geosciences and Natural Resources (BGR)
132-7.3.2.2.2).
