Rosemount 8800D Series User Manual

Reference Manual
00809-0100-4004, Rev BA
August 2010
2-17
Rosemount 8800D
Analog Output
The flowmeter provides a 4–20 mA dc isolated current output, linear
with the flow rate.
To make connections, remove the FIELD TERMINALS side cover of the
electronics housing. All power to the electronics is supplied over the 4–20 mA
signal wiring. Connect the wires as shown in Figure 2-14 on page 2-19.
NOTE
Twisted pairs are required to minimize noise pickup in the 4–20 mA signal and
digital communication signal. For high EMI/RFI environments, shielded signal
wire is required and preferred in all other installations. To ensure
communication, wiring should be 24 AWG or larger and not exceed 5,000 ft
(1500 m).
Figure 2-11. Power Supply Load Limitations
Gage Number A.W.G. Ohms per 1,000 ft (305 m) at 68 °F (20 °C) Equivalent
14 2.525
16 4.016
18 6.385
20 10.15
22 16.14
24 25.67
1500
1000
500
0
42
10.8
R
max
= 41.7(V
ps
– 10.8)
V
ps
= power supply voltage (volts)
R
max
= maximum loop resistance (ohms)
Power Supply (volts)
Load (Ohms)

Rosemount 8800D Series Specifications

General

Type	Vortex Flow Meter
Measurement Principle	Vortex Shedding
Operating Temperature	-40 to 185°F (-40 to 85°C)
Storage Temperature	-40 to 185°F (-40 to 85°C)
Communication Protocols	FOUNDATION Fieldbus
Material	316 stainless steel
Fluid Type	Liquid, Gas, Steam
Line Size	1/2 to 8 inches (15 to 200 mm)
Approvals	ATEX, IECEx, CSA, FM
Output Signal	4-20 mA
Process Connection	Flanged, Wafer, Threaded
Electrical Connection	M20
Protection Rating	IP66
Mounting Style	Wafer, Flanged