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6
Determining a Location
Maximum wiring distances
If the transmitter is mounted remotely from the sensor, the maximum distance between the sensor and
transmitter depends on cable type. See Table 2.
Pipe run
Micro Motion sensors do not require a straight run of pipe upstream or downstream.
Valves
After the sensor and transmitter have been installed, you must perform the zeroing procedure. During the
zeroing procedure, flow through the sensor must be halted and the sensor tubes must be completely full of
process fluid. A shutoff valve, downstream from the sensor, is recommended to halt flow during the zeroing
procedure. For more information about zeroing, refer to the instruction manual shipped with the transmitter.
Table 2 Maximum cable lengths
Cable type Wire size Maximum length
Micro Motion 9-wire to an MVD transmitter
or core processor
Not applicable 60 feet (20 meters)
Micro Motion 9-wire to all other transmitters Not applicable 1000 feet (300 meters)
Micro Motion 4-wire Not applicable 1000 feet (300 meters)
User-supplied 4-wire
(1)
(1) Micro Motion recommends using Micro Motion cable.
Power wires (VDC) 22 AWG (0,35 mm
2
) 300 feet (90 meters)
20 AWG (0,5 mm
2
) 500 feet (150 meters)
18 AWG (0,8 mm
2
) 1000 feet (300 meters)
Signal wires (RS-485) 22 AWG (0,35 mm
2
) or larger 1000 feet (300 meters)