Deltabar S FOUNDATION Fieldbus Installation
Endress+Hauser 5
• General recommendations for routing the impulse piping can be found in DIN 19210
"Methods for measurement of fluid flow; differential piping for flow measurement devices" or
the corresponding national or international standards.
• Using a three-valve or five-valve manifold allows for easy commissioning, installation and
maintenance without interrupting the process.
• When routing the impulse piping outdoors, ensure that sufficient anti-freeze protection is
used, e.g. by using pipe heat tracing.
• Do not clean or touch diaphragm seals with hard or pointed objects.
• Install the impulse piping with a monotonic gradient of at least 10%.
• To ensure optimal readability of the onsite display, it is possible to rotate the housing up to
380°.
• Endress+Hauser offers a mounting bracket for installing on pipes or walls.
3.2 Measuring arrangement
3.2.1 Pressure measurement
• The PMD70, PMD75 and FMD78 are best suited for differential pressure measurement.
• Measuring arrangement for gases: Mount device above the measuring point.
• Measuring arrangement for liquids and steams: Mount device below tapping point.
• For differential pressure measurement in vapor, mount the condensate traps at the same level
as the same the tapping point and at the same distance from Deltabar S.
3.2.2 Level measurement
• All Deltabar S devices are best suited for level measurement in closed tanks.
• PMD70, PMD75, FMD76 and FMD77 are suitable to level measurement in open tanks.
Measuring arrangement level measurement in closed tanks and closed tanks with
superimposed vapor
• PMD70, PMD75: Mount device below the lower measuring connection. Always connect the
negative side above the maximum level via an impulse piping.
• FMD76, FMD77: Mount device direct on the tank. Always connect the negative side above
the maximum level via an impulse piping.
• FMD78 ä 7, Section 3.3 and Section 3.4.
• In the case of level measurement in closed tanks with superimposed vapor, a condensate trap
ensures pressure which remains constant on the minus side.
Measuring arrangement level measurement in open tanks
• PMD70, PMD75: Mount device below the lower measuring connection. The negative side is
open to atmosphere pressure.
• FMD76, FMD77: Mount device direct on the tank. The negative side is open to atmosphere
pressure.
3.2.3 Flow measurement
• The PMD70 and PMD75 are best suited for flow measurement.
• Measuring arrangement for gases: Mount device above the measuring point.
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