Technical information

Deltabar M PMD55
Endress+Hauser 21
Operating conditions (Installation)
General installation
instructions
• The position-dependent zero shift can be corrected directly at the device via operating keys.
• Endress+Hauser offers a mounting bracket for installing the device on pipes or walls  ä 22, section "Wall
and pipe mounting".
• When measuring in media with solid proportions, such as dirty liquids, installing separators and drain valves
is useful for capturing and removing sediment.
• Using a three-valve or five-valve manifold allows for easy commissioning, installation and maintenance
without interrupting the process.
• General recommendations for 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.
• Install the impulse piping with a continuous gradient of at least 10 %.
• When routing the impulse piping outdoors, ensure that sufficient anti-freeze protection is used, e.g. by using
pipe heat tracing.
Measuring arrangement Flow measurement
• Measuring arrangement for gases: Mount device above the measuring point.
• Measuring arrangement for liquids and vapours: Mount device below tapping point.
• For flow measurement in vapours, mount the condensate traps at the same level as the same the tapping
point and at the same distance from Deltabar M.
Level measurement
Measuring arrangement level measurement in open tanks
• Mount device below the lower measuring connection. The low-pressure side is open to atmosphere
pressure.
Measuring arrangement level measurement in closed tanks and closed tanks with superimposed vapour
• Mount device below the lower measuring connection. Always connect the low-pressure side above the
maximum level.
• In the case of level measurement in closed tanks with superimposed vapour, a condensate trap ensures
pressure which remains constant on the low-pressure side.
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 vapour, mount the condensate traps at the same level as the same
the tapping point and at the same distance from Deltabar M.