Emerson F-SERIES SENSOR Maximum wiring distances, Maximum cable lengths, Pipe run, Valves

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.

For high-temperature and extreme high-temperature F-Series sensors, note the following:

•For sensors with a Model 1700/2700 transmitter, the transmitter is considered to be integrally mounted on the sensor, so Table 2 does not apply.

•For sensors with a junction box or core processor, the limits in Table 2 apply only to the wiring between the junction box or core processor and a remotely mounted transmitter. The length of the flexible conduit on which the junction box or core processor is mounted does not need to be considered.

Table 2 Maximum cable lengths

Cable type		Wire size		Maximum length
Micro Motion 9-wire to an MVD		Not applicable		60 feet (20 meters)
transmitter or core processor
Micro Motion 9-wire to all other		Not applicable		1000 feet (300 meters)
transmitters
Micro Motion 4-wire	Not applicable			1000 feet (300 meters)
User-supplied 4-wire
Power wires (VDC)	22		AWG (0,35 mm2)	300 feet (90 meters)
	20		AWG (0,5 mm2)	500 feet (150 meters)
	18		AWG (0,8 mm2)	1000 feet (300 meters)
Signal wires (RS-485)	22		AWG (0,35 mm2) or larger	1000 feet (300 meters)

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.

Sensor Installation: F-Series 11