Endress+Hauser prowirl 77, Руководство по эксплуатации

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3 Mounting and Installation
3.1 General Information
Protection IP 67 (EN 60529)
The instruments fulfil all the requirements for IP 67. The following points must always
be observed in order to ensure protection to IP 67 after istallation in the field or after
servicing:
•
Housing gaskets must be clean and
undamaged when inserted in the
gasket groove. The gaskets may need
to be dried, cleaned or replaced.
•
All housing screws and the housing
cover must be firmly tightened.
•
The cables used for connecting
must have an outer diameter in the
specified range.
•
The cable gland must be firmly
tightened (see Fig. 2).
•
The cable must loop down before
entering the cable gland to ensure that
no moisture can enter it
(see Fig. 2).
•
Any unused cable glands are to be
replaced with a plug.
•
The protective bushing should not be
removed from the cable gland.
Temperature ranges
•
The maximum approved ambient and process temperatures must be observed
(see page 56).
•
Observe also the instructions on piping insulation and mounting position
(see page 11).
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37y
11
Fig. 2
Protection IP 67
Prowirl 77 PROFIBUS-PA 3 Mounting and Installation
Hauser 9