Endress+Hauser Proline Promag H 200, Краткое руководство по эксплуатации

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Proline Promag H 200 Installation
Hauser 21
Comply with the following instructions when installing seals:
• Make sure that the seals do not protrude into the piping cross-section.
• With metal process connections, you must fully tighten the screws. The process connection
forms a metallic connection with the sensor, which ensures a defined compression of the seal.
• With plastic process connections, note the max. torques for lubricated threads:
7 Nm (5.2 lbf ft). With plastic flanges, always use seals between connection and counter flange.
• For "PFA" lining: additional seals are always required.
• The seals must be replaced periodically, depending on the application, particularly in the case
of gasket seals (aseptic version)! The period between changes depends on the frequency of
cleaning cycles, the cleaning temperature and the fluid temperature. Replacement seals can
be ordered as accessories .
Mounting the ground rings
Observe the information on potential equalization (
®
ä 29).
In case the process connections are made of plastic (e.g. flanges or adhesive fittings), the potential
between the sensor and the fluid must be equalized using additional ground rings. If the ground
rings are not installed this can affect the accuracy of the measurements or cause the destruction
of the sensor through the electrochemical erosion of the electrodes.
• Depending on the option ordered, plastic disks may be installed at the process
connections instead of ground rings. These plastic disks serve only as spacers and have
no potential equalization function. In addition, they provide a sealing function at the
interface between the sensor and process connection. For this reason, with process
connections without ground rings, these plastic disks/seals must not be removed, or
must always be installed.
• Ground rings can be ordered separately from Hauser as accessories . When
placing the order, make certain that the ground ring is compatible with the material used
for the electrodes. Otherwise, there is a risk that the electrodes may be destroyed by
electrochemical corrosion!
• Ground rings, including the seals, are mounted within the process connections.
Therefore, the fitting length is not affected.