Emerson 20002514 Manuel D’Utilisation

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Planning
Topics covered in this chapter:
1.1
Installation checklist
Make sure that the hazardous area specified on the sensor approval tag is suitable
for the environment in which the sensor is installed.
Verify that the local ambient and process temperatures are within the limits of the
sensor. See 
.
If your sensor has an integral transmitter, no wiring is required between the sensor
and transmitter. Follow the wiring instructions in the transmitter installation manual
for signal and power wiring.
If your transmitter has remote-mounted electronics, follow the instructions in this
manual for wiring between the sensor and the transmitter, and then follow the
instructions in the transmitter installation manual for power and signal wiring.
For the wiring between the sensor and the transmitter, consider maximum cable
lengths (see 
and transmitter depends on the cable type. For all types of wiring, Micro Motion
recommends using Micro Motion cable.
Maximum lengths for Micro Motion cable
Table 1-1:   
Cable type
To transmitter
Maximum length
Micro Motion 4-wire
All 4-wire MVD transmitters
1000 ft (300 m)
Maximum lengths for user-supplied 4-wire cable
Table 1-2:   
Wire function
Wire size
Maximum length
Power (VDC)
22 AWG (0,35 mm
2
)
300 ft (90 m)
20 AWG (0,5 mm
2
)
500 ft (150 m)
18 AWG (0,8 mm
2
)
1000 ft (300 m)
Signal (RS-485)
22 AWG (0,35 mm
2
) or larger
1000 ft (300 m)
For best performance, follow Micro Motion recommendations for sensor orientation
(see 
remain full of process fluid.
Planning
Installation Manual 
1