Reference Manual
00809-0100-4664, Rev BA
January 2010
Rosemount 8712
2-14
Rosemount recommends using the combination signal and coil drive for N5,
E5 approved sensors for optimum performance.
Remote transmitter installations require equal lengths of signal and coil drive
cables. Integrally mounted transmitters are factory wired and do not require
interconnecting cables.
Lengths from 5 to 1,000 feet (1.5 to 300 meters) may be specified, and will be
shipped with the sensor.
Conduit Cables Run the appropriate size cable through the conduit connections in your
magnetic flowmeter system. Run the power cable from the power source to
the transmitter. Run the coil drive and electrode cables between the flowmeter
and transmitter.
Prepare the ends of the coil drive and electrode cables as shown in Figure
2-12. Limit the unshielded wire length to 1-inch on both the electrode and coil
drive cables.
NOTE
Excessive lead length or failure to connect cable shields can create electrical
noise resulting in unstable meter readings.
Figure 2-12. Cable Preparation
Detail
Table 2-3. Cable Requirements
Description Units Part Number
Signal Cable (20 AWG) Belden 8762, Alpha 2411 equivalent ft
m
08712-0061-0001
08712-0061-0003
Coil Drive Cable (14 AWG) Belden 8720, Alpha 2442 equivalent ft
m
08712-0060-0001
08712-0060-0003
Combination Signal and Coil Drive Cable (18 AWG)
(1)
(1) Combination signal and coil drive cable is not recommended for
high-signal magmeter system. For remote mount installations, combination signal and coil drive cable
should be limited to less than 300 ft. (100 m).
ft
m
08712-0752-0001
08712-0752-0003
1.00
(26)
NOTE
Dimensions are in
inches (millimeters).
Cable Shield
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