Quick Installation Guide
Product Discontinued December 2009
00825-0100-4031, Rev AA
April 2005
Duct Mount 285 Annubar
Rosemount 285 Annubar® Duct Mount
Star t
Step 1: Location and Orientation
Step 2: Installation Preparation
Step 3: Installation
Step 4: Mount the Transmitter
Product Certifications
End
www.rosemount.com
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Quick Installation Guide
00825-0100-4031, Rev AA
Duct Mount 285 Annubar
© 2005 Rosemount Inc. All rights reserved. All marks property of owner. Rosemount and the Rosemount logotype are
registered trademarks of Rosemount Inc.
Rosemount Inc.
8200 Market Boulevard
Chanhassen, MN USA 55317
T (US) (800) 999-9307
T (Intnl) (952) 906-8888
F (952) 949-7001
Emerson Process Management Asia Pacific
Private Limited
1 Pandan Crescent
Singapore 128461
T (65) 6777 8211
F (65) 6777 0947/65 6777 0 743
Emerson Process Management GmbH & Co. OHG
Argelsrieder Feld 3
82234 Wessling
Germany
T 49 (8153) 9390
F49 (8153) 939172
Beijing Rosemount Far East Instrument Co.,
Limited
No. 6 North Street,
Hepingli, Dong Cheng District
Beijing 100013, China
T (86) (10) 6428 2233
F (86) (10) 6422 8586
April 2005
IMPORTANT NOTICE
This installation guide provides basic guidelines for Rosemount 285 Annubar. It does not
provide instructions for configuration, diagnostics, maintenance, service, troubleshooting,
Explosion-proof, Flame-Proof, or instrinsically safe (I.S.) installations. Refer to the 285
Annubar reference manual (document number 00809-0100-4028) for more instruction.
This manual is also available electronically on www.rosemount.com.
WARNING
Process leaks may cause harm or result in death. To avoid process leaks, only use
gaskets designed to seal with the corresponding flange and o-rings to seal process
connections. Flowing medium may cause the 285 Annubar assembly to become hot and
could result in burns.
STEP 1: LOCATION AND ORIENTATION
Correct location in the duct is important for accurate measurement. See Table 1 on page 3
for proper installation locations.
Straight-run Installations
The recommended straight-run duct lengths upstream are 7W or 7H; downstream, 2W or
2H. Installation across the longest dimension is preferred.
H
2W
W
7W
2
H
2H
W
7H
285/15-490024-901,
15-490025-901.eps
Quick Installation Guide
1
1
00825-0100-4031, Rev AA
April 2005
Duct Mount 285 Annubar
Elbow Installations
The unit will measure accurately when installed 2 duct widths (height) downstream of a 90°
elbow in plane with the elbow.
H
W
2W
H
Special Installations
For unique duct configurations, consult the factory.
Table 1. Minimum straight duct requirements for the 285 Annubar
Upstream Length Downstream Length
H
W
H
W
15W
7W
7W
2W
285/15-490028-901
2W
285/15-490029-901
H
2W
2H
W
7W 2W
7W 2W
15W 2W
285/15-490026-901,
15-490027-901.eps
W
7W
2W
285/15-490030-90
H
7W 2W
15W
W
2W
285/15-490031-90
3.864
15W 2W
DAMPER
W
285/15-490032-901
3
Quick Installation Guide
A
00825-0100-4031, Rev AA
Duct Mount 285 Annubar
April 2005
STEP 2: INSTALLATION PREPARATION
Operating Limitations
For the Annubar to produce accurate, repeatable flow measurement, the following must be
considered. The maximum allowed pressure and temperature limits are:
• Annubar Type D1 (duct mount without compression fitting): 10 psig @ -40°F to 850°F.
• Annubar Type D2 (duct mount with compression fitting): 10 psig @ -40°F to 300°F.
Annubar Installation Preparation
1. Make sure there is enough clearance to insert the Annubar into the duct.
2. Mark the mounting location of the Annubar, locating it along the center line of the
rectangular duct, or anywhere on the circumference of a round duct. Mark horizontal and
vertical center lines through the mounting location. For duct mount Annubars without
compression fitting (threaded stud welded to tip of sensor), extend the center line to the
opposite duct wall (or 180° around a circular duct), as shown in Figure 1.
Figure 1.
3. Measure and mark the locations of the mount screw holes and the opposite side support
285/15-490013-903,
hole (for Annubars with threaded stud welded to sensor tip) (see Table 2).
Figure 2.
180°
H
H/2
A
Table 2. Installation dimensions inches (mm)
Annubar Model Number A
285xxxxxxxxxx1x 0.75 (19.05)
285xxxxxxxxxx2x 1.31 (33.27)
4
A
A
Ø
A
A
A
A
285/15-490013-901,
15-490033-903
15-490034-901.eps
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