3 Installation Promag 53 PROFIBUS-DP/-PA
14 Endress+Hauser
Partially filled pipes
Partially filled pipes with gradients necessitate a drain-type configuration. The Empty
Pipe Detection function (see Page 106) offers additional protection by detecting empty
or partially filled pipes.
Caution:
Risk of solids accumulating. Do not install the sensor at the lowest point in the drain. It
is advisable to install a cleaning valve.
Fig. 7: Installation in partially filled pipe
Down pipes
Install a siphon or a vent valve downstream of the sensor in down pipes longer than
5 meters. This precaution is to avoid low pressure and the consequent risk of damage
to the lining of the measuring tube. These measures also prevent the system losing
prime, which could cause air inclusions.
Information on the lining's resistance to partial vacuum can be found on Page 142.
Fig. 8: Measures for installation in a down pipe (a = vent valve; b = siphon)
F06-5xxxxxxx-11-00-00-xx-002F06-5xxxxxxx-11-00-00-xx-003
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