Instruction manual

Micro Motion
®
Model D and DT Sensors Instruction Manual 9
Pipe run
Micro Motion sensors do not require a straight run of pipe upstream or
downstream.
Maximum wiring distances
Use these guidelines for calculating maximum wiring distances.
Maximum distance between sensor and transmitter depends on cable
type. See Table 1.
.
Keys for sensor location
The sensor may be located anywhere in the process line, as long as
the following conditions are met:
• Before operation, you must be able to stop flow through the sensor.
(During the zeroing procedure, flow must be stopped completely, and
the sensor must be full of process fluid.)
• The sensor must be installed in an area that is compatible with the
classification specified on the sensor approvals tag. (See
illustrations, pages 3-6.)
Table 1. Maximum cable lengths
Cable type Wire gauge 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)
Step 1
Location
Installation