2.6 Mounting the transmitter (remote-mounted version)
It is necessary to mount the transmitter remote from the sensor when:
•
Accessibility is difficult
•
Space is restricted
•
Extreme medium and ambient temperatures prevail
(for temperature ranges see Chapter 6 “Technical Data”)
•
Severe vibration (>2 g/2 h per day; 10...100 Hz)
Caution!
•
The permissible length of cable L
max
between the sensor and the transmitter at a
distance of >10 m is governed by the conductivity of the medium (Fig. 22).
•
Fix the cable run or lay it in conduit. When the conductivity of the medium is low,
cable movements can cause serious changes in capacitance and thereby falsify
the measuring signal.
•
Do not lay cable in the vicinity of electrical machines or switching elements.
•
Pay attention to potential equalization between the transmitter and the sensor.
•
Please connect the cable as described on page 23.
Conductivity
[
µ
S/cm]
b
a
028y
20
Transmitter housing
Wiring compartment
connection housing
Wall holder
Length of cable for the remote-mounted version (FS and FL)
Permissible
range
Cable length L
max
[m]
Fig. 22
Fixing the wall holder/Stamped lead seal
Compact version
Remote version
Sealing of compact versions
The cover of the electronic compart-
ment of the Promag 31 is separetly
sealed. Instead of the conventional
cylindric screws a leading screw is
used and the seal wire is drawn
through it and fixed under the clutch.
Stamped lead seal for remote version
(Promag 31 F for example)
In addition to the above mentioned
and described seal the connection
housing in both the sensor and the
electronics will be lead sealed after in-
stallation by the service man with a
user protection (sealed from works).
Sealing by
authorised
institution
Sealing
after the
installation
b
a
0
28y
t7
Fig. 23
Promag 31
2. Mounting and Installation
Hauser
19
Содержание promag 31
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Страница 44: ...5 Fault Location and Remedies Promag 31 44 Endress Hauser ...
Страница 56: ...6 Technical Data Promag 31 56 Endress Hauser ...
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