Emerson 2700 2.3.4Maximum cable lengths, 2 Maximum cable lengths, 2.4Mounting the transmitter

Installing the Transmitter

2.3.4Maximum cable lengths

This requirement does not apply to integral installations (see Figure 2-1). For other installation types (see Figure 2-1), maximum cable length between flowmeter components depends on the installation type and the cable type. Refer to Figure 2-1,then see Table 2-2.

Table 2-2Maximum cable lengths

Cable type	Wire gauge		Maximum length
Micro Motion 9-wire	Not applicable		60 feet (20 meters)
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)

2.3.5Accessibility for maintenance

Ensure that the transmitter is mounted in a location and orientation that will allow easy access to the terminals and to the display (if your transmitter has a display).

2.4Mounting the transmitter

You can mount the transmitter in any orientation as long as the conduit and wiring openings do not point upward. If possible, mount the transmitter so that there is at least 8–10″(200–250 mm) clearance at the rear of the housing to enable operator access to the wiring and power compartments. For transmitter dimensions, see Appendix A.

CAUTION

Condensation or excessive moisture entering the transmitter could damage the transmitter and result in measurement error or flowmeter failure.

To reduce the risk of measurement error or flowmeter failure:

•Ensure the integrity of gaskets and O-rings.

•Grease the O-rings every time the transmitter housing or core processor housing is opened and closed.

•Do not mount the transmitter with the conduit openings pointing upward.

•Install drip legs on conduit or cable.

•Seal the conduit openings.

•Fully tighten the transmitter cover.

Before You Begin

Installing the Transmitter

Sensor Wiring

Output Wiring – Analog

Installation Manual 9