3.10 Mounting the transmitter (remote version)
The transmitter has to be mounted remote from the sensor when:
• access is difficult,
• space is restricted,
• extreme process and ambient temperatures prevail (for temperature ranges
see page 110),
• there is severe vibration (> 2 g/2 h per day; 10...100 Hz).
Wall and post mounting
The remote mounted version is delivered
with a wall bracket as standard.
A special mounting set can be supplied
for post mounting: Order No. 50076905.
Connecting cable
Two different versions are available
for remote versions:
FS version:
• The permissible length of cable
L
max
of more than 10 m is governed
by the conductivity of the fluid
(see Fig. 19).
• The maximum possible cable length is
limited to 10 meter for instruments with
Empty Pipe Detection (EPD). This
function is only available with the
FS version.
• The FS cable is recommended only for
distances smaller than 20 m.
FL version:
• All fluids with a minimum conductivity
of ≥ 5 µS/cm (demineralised water
≥ 20 µS/cm) can be measured.
This is not dependent on the distance
between transmitter and sensor
(see Fig. 19).
• Empty Pipe Detection (EPD) is
not
available with this version.
Please also note the following for
obtaining correct readings:
• Fasten the cable gland or lay it in a
conduit. When the fluid conductivity is
low, cable movements can cause
serious changes in capacitance and
thereby falsify the measuring signal.
• Do not run the cable in the vicinity of
electrical machines or switching
elements.
• Ensure potential equalisation between
the transmitter and the sensor.
Wall mounting
Post mounting (∅ 3/4...3")
ba009y29
Fig. 18
Wall and post mounting
200
100
5
10 100 200 [m]
FL
FS
Conductivity
[µS/cm]
Cable length L
max
ba009y24
L
max
Permissible
range
Fig. 19
Fluid conductivity and cable
length with the remote version
3 Mounting and Installation Promag 33
20 Endress+Hauser
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