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Wiring the 9739 MVD transmitter to the sensor
Wire the transmitter to the sensor using jacketed cable
Prerequisites
For ATEX installations, the jacketed cable must be installed inside a user-supplied sealed metallic conduit that provides
360° termination shielding for the enclosed cable.
360° termination shielding for the enclosed cable.
Sensor wiring is intrinsically safe. To keep sensor wiring intrinsically safe, keep the sensor wiring separated from
power supply wiring and output wiring.
Keep cable away from devices such as transformers, motors, and power lines, which produce large magnetic fields.
Improper installation of cable, cable gland, or conduit could cause inaccurate measurements or flow meter failure.
Install cable glands in the 9–wire conduit opening in the transmitter housing and the sensor junction box. Ensure
that the cable drain wires and shields do not make contact with the junction box or the transmitter housing.
Improper installation of cable or cable glands could cause inaccurate measurements or flow meter failure.
Improper installation of cable or cable glands could cause inaccurate measurements or flow meter failure.
Improperly sealed housings can expose electronics to moisture, which can cause measurement error or flowmeter
failure. Install drip legs in conduit and cable, if necessary. Inspect and grease all gaskets and O-rings. Fully close
and tighten all housing covers and conduit openings.
and tighten all housing covers and conduit openings.
Procedure
1.
Install drip legs in conduit, if necessary.
2.
Run the cable through the conduit. Do not install 9-wire cable and power cable in the same conduit.
3.
To prevent conduit connectors from seizing in the threads of the conduit openings, apply a conductive anti-galling
compound to the threads, or wrap threads with PTFE tape two to three layers deep.
compound to the threads, or wrap threads with PTFE tape two to three layers deep.
Wrap the tape in the opposite direction that the male threads will turn when inserted into the female conduit
opening.
opening.
4.
At both the sensor and transmitter, do the following:
a. Remove the junction-box and transmitter housing covers.
b. Connect a male conduit connector and waterproof seal to the conduit opening for 9-wire.
c. Pass the cable through the conduit opening for the 9-wire cable.
d. Insert the stripped end of each wire into the corresponding terminal at the sensor and transmitter ends, matching
by color (see Table 4-2). No bare wire should remain exposed.
Note
For ELITE
®
, H-Series, T-Series, and some F-Series sensors, match the wire to the terminal by the color identified
on the inside of the sensor junction box cover. See Sensor and transmitter terminals for illustrations identifying
the various sensor and 9739 MVD transmitter terminals.
the various sensor and 9739 MVD transmitter terminals.
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Micro Motion 9739 MVD Transmitters