Emerson Daniel 3818, Руководство по установке

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WARNING
EXPLOSION OR FIRE HAZARD
Read and follow the instructions below:
• Conduit runs must have a sealing fitting within 457mm (18 inches) of the enclosure
to reduce the risk of an explosion or a fire.
• During operation, keep covers tightly closed. DO NOT open the transmitter
electronics enclosures when an explosive atmosphere may be present.
• During equipment maintenance, disconnect power before opening the transmitter
electronics enclosures. Clean cover joints before replacing.
• DO NOT substitute meter components. Substituting components may compromise
the intrinsic safety of the device.
Failure to follow these safety instructions can result in severe injury to personnel or
cause damage to the equipment.
2.3 Piping recommendations
Recommendations for best measurement results:
• Honed or un-honed meter tube(s)
• Flow direction (unidirectional or bidirectional)
• Correct meter size selection - too low may cause poor flow stability (thermal
convection) or too fast may cause erosion problems and resonance, cracks or failure of
probes or thermowells (approximately .6 to 12 m/sec or 2 to 40 ft/sec).
• Space availability for meter lengths (to allow inlet piping customization)
• Concentric alignment pins or flange concentricity technique considerations
NOTICE
For optimal flow measurement conditions, Daniel suggests the piping configurations
below. Regardless of the configuration selected, the user agrees to accept full
responsibility for the site piping design and installation.
Figure 2-2: Piping recommendations unidirectional flow
Mechanical Installation Installation manual
May 2019 3-9000-771
30 3818 LNG Liquid Ultrasonic Meter