1
Planning
Topics covered in this chapter:
•
Installation checklist
•
Best practices
•
Temperature limits
1.1
Installation checklist
□
Make sure that the hazardous area specified on the approval tag is suitable for the
environment in which the meter will be installed.
□
Verify that the local ambient and process temperatures are within the limits of the
meter.
□
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.
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) without Ex-
approval
-
500 ft (150 m) with IIC rated
sensors
-
1000 ft (300 m) with IIB rated
sensors
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)
□
The sensor will work in any orientation as long as the flow tubes remain full of
process fluid.
Planning
Installation Manual
1
