Quick Installation Guide
00825-0100-4004, Rev DB
December 2011
Rosemount 8800D
10
Use the following steps to wire the flowmeter:
1. Remove the housing cover on the side marked FIELD TERMINALS.
2. Connect the positive lead to the “+” terminal and the negative lead to the “-” terminal as
shown in Figure 13 for HART installations and Figure 14 for F
OUNDATION fieldbus
installations.
NOTE
F
OUNDATION fieldbus terminals are not polarity sensitive.
3. For HART installations utilizing the pulse output, connect the positive lead to the “+”
terminal of the pulse output and the negative lead to the “-” terminal of the pulse output
as shown in Figure 13. A separate 5 to 30 Vdc power supply is required for the pulse
output. Maximum switching current for the pulse output is 120 mA.
CAUTION
Do not connect the powered signal wiring to the test terminals. Power could damage the test
diode in the test connection. Twisted pairs are required to minimize noise pick up 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. Use 24 AWG or larger wire and
do not exceed 5,000 feet (1,500 meters). For F
OUNDATION fieldbus use wire specifically
designed for fieldbus installations for maximum performance. For ambient temperatures
above 140 °F (60 °C) use wire rated to 176 °F (90 °C).
Figure 13 shows wiring connections necessary to power a Rosemount 8800D and enable
communications with a hand-held Field Communicator.
Figure 14 shows wiring connections necessary to power the 8800D with F
OUNDATION
fieldbus.
4. Plug and seal unused conduit connections. Use pipe sealing tape or paste on threads
to ensure a moisture-tight seal. Housing conduit entries marked with M20 will require
M-20 x 1.5 blanking plug thread. Unmarked conduit entries will require a 1/2 -14 NPT
blanking plug thread.
NOTE
Straight threads require a minimum of three (3) wraps of tape to obtain a tight seal.
5. If applicable, install wiring with a drip loop. Arrange the drip loop so the bottom is lower
than the conduit connections and the flowmeter housing.
Rosemount 8800D Vortex units ordered with painted meter body may be subject to
electrostatic discharge. To avoid electrostatic charge build-up, do not rub the meter body
with a dry cloth or clean with solvents.
4004_RevDB.fm Page 10 Wednesday, November 23, 2011 3:06 PM
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