4
Electrical Connection
Warning!
•
When connecting Ex-approved instruments, please observe all instructions and
wiring diagrams given in the Ex supplement to this Operating Manual.
Your E+H representative will be pleased to provide you with more information.
•
When using the remote version, only sensors and transmitters with the same serial
number are to be connected together. Measuring errors can occur if this is not the
case.
4.1
Degree of protection
The instruments fulfil all the requirements for IP 67. After successful installation in the
field or after servicing, the following points must always be observed in order to
ensure the degree of protection IP 67:
•
Housing seals must be clean and
undamaged when inserted in the seal
groove. The seals may need to be
dried, cleaned or replaced.
•
All housing screws and the housing
cover must be tightened firmly.
•
The cables used for connecting must
have the correct outer diameter (see
page 27).
•
The cable gland must be tightened
firmly (see Fig. 20).
•
The cable must loop down before
entering the cable gland to ensure
that no moisture can enter it (see
Fig. 20).
Install the sensor so that the cable
glands first hang down and do not first
go upwards.
•
Any cable gland not used must be
replaced with a blind plug.
•
The protective bushing should not be
removed from the cable gland.
Caution!
The screws of the Promag sensor housing must not be loosened or the degree of
protection guaranteed by E+H is no longer valid.
Note!
The Promag A and F sensors can optionally be supplied with the IP 68 degree of
protection (permanently under water to a depth of 3 m). In this case the transmitter
(IP 67) has to be mounted remote from the sensor.
Warning!
Caution!
Note!
ba009y06
Correct!
Incorrect!
Fig. 20
Mounting cable entries
Promag 33
4 Electrical Connection
Hauser
21
Содержание PROMAG 33
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