Endress+Hauser promag 30, Operating Manual

Page: 24 / 72

3.6 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 page 63)
•
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. 24).
•
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 27f.
Cable length L
max
Conductivity
[
µ
S/cm]
b
a008
y
2
0
Transmitter housing
Wiring compartment
connection housing
Wall holder
Length of cable for the remote-mounted version (FS and FL)
[m]
Permissible
range
Fig. 24
3. Mounting and Installation Promag 30
24 Hauser