Emerson ROSEMOUNT 485 Annubar Pak-Lok User manual

Quick Start Guide
00825-0300-4809, Rev EC
May2023
Rosemount™ 485 Annubar™ Pak-Lok
Assembly

NOTICE
This guide provides basic guidelines for Rosemount 485 Annubar. It does not provide
instructions for configuration, diagnostics, maintenance, service, troubleshooting, Explosion-
proof, Flameproof, or Intrinsically Safe (I.S.) installations. Refer to Rosemount 485 Annubar
Reference Manual for more instruction. This manual is also available electronically on
Emerson.com/Rosemount.
If the Rosemount Annubar was ordered assembled to a Rosemount Pressure Transmitter,
see the following Quick Start Guides for information on configuration and hazardous
locations certifications:
Rosemount 3051S Series Pressure Transmitter and Rosemount 3051SF Series Flowmeter
Quick Start Guide.
Rosemount 3051S MultiVariable Transmitter and Rosemount 3051SF Series Flowmeter
MultiVariable Transmitter Quick Start Guide.
Rosemount 3051 Pressure Transmitter and Rosemount 3051CF Series Flowmeter Transmitter
Quick Start Guide.
Rosemount 2051 Pressure Transmitter and Rosemount 2051CF Series Flowmeter Transmitter
Quick Start Guide.
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 Rosemount 485 Annubar assembly to become hot and could
result in burns.
Contents
Location and orientation.............................................................................................................3
Drill sensor holes ...................................................................................................................... 12
Weld mounting hardware.........................................................................................................14
Insert the Rosemount Annubar .............................................................................................. 15
Mount the transmitter...............................................................................................................19
Product certifications................................................................................................................ 22
Declaration of Conformity........................................................................................................ 23
China RoHS................................................................................................................................. 27
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1 Location and orientation
Correct orientation and straight run requirements must be met for
accurate and repeatable flow measurements. Refer to Table 1-1 for
minimum pipe diameter distances from upstream disturbances.
Table 1-1: Straight Run Requirements
In plane Out of plane Upstream pipe diameters Downstream
pipe
diameters
Without
straightening
vanes
With
straightening
vanes
In
plane
A
Out
of
plane
A
A’ C C’ B
1

8 10 N/A N/A N/A 4
N/A N/A 8 4 4 4
2 11 16 N/A N/A N/A 4
N/A N/A 8 4 4 4
3  23 28 N/A N/A N/A 4
N/A N/A 8 4 4 4
4  12 12 N/A N/A N/A 4
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Table 1-1: Straight Run Requirements (continued)
In plane Out of plane Upstream pipe diameters Downstream
pipe
diameters
Without
straightening
vanes
With
straightening
vanes
In
plane
A
Out
of
plane
A
A’ C C’ B
N/A N/A 8 4 4 4
5 18 18 N/A N/A N/A 4
N/A N/A 8 4 4 4
6 30 30 N/A N/A N/A 4
N/A N/A 8 4 4 4
Note
•Consult the factory for instructions regarding use in square or
rectangular ducts.
•“In plane A” means the sensor is in the same plane as the elbow.
“Out of plane A” means the bar is perpendicular to the plane of
the elbow.
•If proper lengths of straight run are not available, position the
mounting such that 80% of the run is upstream and 20% is
downstream.
•Use straightening vanes to reduce the required straight run
length.
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•Row 6 in Table 1-1 applies to gate, globe, plug, and other
throttling valves that are partially opened, as well as control
valves.
1.1 Exploded view drawings
Figure 1-1: Rosemount 485 Annubar Pak-Lok Assembly Exploded
View
F
A
B
C
D
E
(1)
A. Transmitter
B. Coplanar flange with drain vents
C. 2 x O-rings
D. Direct-mount transmitter connection with valves
E. Pak-Lok body
F. See Figure 1-2 for details.
(1) Transmitter and housing are shown for clarity purposes — only supplied if
ordered.
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Figure 1-2: Rosemount 485 Annubar Pak-Lok Assembly Detail
Exploded View
A
B
C
D
E
F
G
A. Nuts
B. Follower
C. 3 x Packing rings
D. Studs
E. Compression plate
F. Retaining ring
G. Rosemount 485 Annubar Sensor
1.2 Misalignment
Rosemount 485 Annubar installation allows for a maximum
misalignment of 3°.
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Figure 1-3: Misalignment
±3° ±3°
±3°
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1.3 Flowmeter Orientation
Figure 1-4: Flowmeter Orientation for Liquid
Direct mount
Horizontal liquid Vertical liquid(1)
45° 45°
30°
Recommended
zone 30°
Recommended
zone 30°
Flow
360°
Remote mount
Horizontal liquid Vertical liquid(1)

(1) Downward flow is not recommended.
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Figure 1-5: Flowmeter Orientation for Gas
Direct mount
Horizontal gas Vertical gas
45° 45°
Recommended
zone 90°
360°
Flow
Remote mount
Horizontal gas Vertical gas
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Figure 1-6: Flowmeter Orientation for Steam
Direct mount
Horizontal steam Vertical steam(1)
45° 45°
30°
Recommended
zone 30°
Recommended
zone 30°
360°
Flow
Remote mount
Horizontal steam Vertical steam(1)

(1) Downward flow is not recommended.
Note
For steam applications with DP readings between 0.75 and 2 inH2O in
horizontal pipes, consider installing the primary element/flowmeter
mounting in the top mounting for steam configuration.
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1.4 Top mounting the flowmeter for steam
Top mounting in steam is an alternative mounting method for steam
installations that can be used if there are space restrictions or other
concerns. This installation method is intended for applications that
run with limited interruptions or shutdowns.
Figure 1-7: Horizontal Top Mounting for Steam
Remote mount

This orientation can be used for any steam temperature. For remote
mount installations, the impulse piping should slope up slightly from
the instrument connections on the Rosemount Annubar to the cross
fittings, allowing condensate to drain back into the pipe. From the
cross fittings, the impulse piping should be routed downward to the
transmitter and the drain legs. The transmitter should be located
below the instrument connections of the Rosemount Annubar.
Depending on the environmental conditions, it may be necessary to
insulate the mounting hardware.
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2 Drill sensor holes
Procedure
1. Determine the sensor size based on the probe width (see
Table 2-1).
Table 2-1: Sensor Size/Hole Diameter Chart
Senso
r size
Sensor width Hole diameter
1 0.590-in. (14.99
mm)
3/4-in. (19 mm) +1/32-in (0.8 mm) – 0.00
2 1.060-in. (26.92
mm)
1 5/16-in. (34
mm)
+1/16-in. (1.6 mm) – 0.00
3 1.935-in. (49.15
mm)
2 1/2-in. (64
mm)
+1/16-in. (1.6 mm) – 0.00
2. Depressurize and drain the pipe.
3. Select the location to drill the hole.
4. Determine the diameter of the hole to be drilled according to
the specifications in Table 2-1. Drill the mounting hole into the
pipe with a hole saw or drill. DO NOT TORCH CUT THE HOLE.
P/N: 28-109001-922 Rev. AC
Drill to Hole Size
WARNING
When drilling the mounting hole(s), Emerson Process
Management recommends the use of a magnetic drill or pipe
clamping fixture to safely drill the hole. Use appropriate
personal protective equipment and procedures when drilling
and welding.
5. Although it is not commonly selected, if an opposite-side
support model is supplied, a second identically sized hole must
be drilled opposite the first hole so that the sensor can pass
completely through the pipe. (To determine if you have an
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opposite-side support model, measure the distance from the
tip to the first slot or hole. If the distance is greater than 1-in.
(25.4 mm), it is the opposite-side support model.) To drill the
second hole, follow these steps:
a) Measure the pipe circumference with a pipe tape, soft
wire, or string. (For the most accurate measurement the
pipe tape needs to be perpendicular to the axis of flow.)
b) Divide the measured circumference by two to
determine the location of the second hole.
c) Re-wrap the pipe tape, soft wire, or string from the
center of the first hole. Then, using the number
calculated in step 5.b, mark the center of what will
become the second hole.
d) Using the diameter determined in Step4, drill the hole
into the pipe with a hole saw or drill. DO NOT TORCH
CUT THE HOLE.
Note
Drill the hole 180° from the first hole for opposite-side support
models.
6. Deburr the drilled holes on the inside of the pipe.
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3 Weld mounting hardware
Procedure
1. Center the Pak-Lok body over the mounting hole, gap 1/16-in.
(1.6 mm), and place four 1/4-in. (6 mm) tack welds at 90°
increments.
2. Check alignment of the Pak-Lok body both parallel and
perpendicular to the axis of flow (see Figure 3-1). If alignment
of mounting is within tolerances, finish weld per local codes. If
alignment is outside of specified tolerance, make adjustments
prior to finish weld.
Figure 3-1: Alignment
A
B
A. Lower Mounting Height (LMH)(2)
B. Tack welds
3. If opposite side support is being used, center the fitting for
the opposite side support over the opposite side hole, gap
1/4-in. (1.6 mm), and place four 1/4-in. (6 mm) tack welds at
90° increments. Insert the sensor into the mounting hardware.
Verify that the tip of the sensor is centered in the opposite
side fitting and that the plug will fit around sensor. Finish weld
per local codes. If the alignment of the sensor does not allow
enough clearance to insert the opposite side plug, make the
necessary adjustments prior to making the finish weld.
4. To avoid serious burns, allow the mounting hardware to cool
before continuing.
(2) LMH values are as follows:
Sensor size 1 — 2.89-in. (73 mm)
Sensor size 2 — 3.92-in. (100 mm)
Sensor size 3 — 3.96-in. (101 mm)
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4 Insert the Rosemount Annubar
Note
Refer to Figure 1-1 for component descriptions.
Procedure
1. Thread studs into the Pak-Lok body.
2. To ensure that the flowmeter contacts the opposite side pipe
wall, mark the tip of the sensor with a marker. (Do not mark if
ordered with option code P2 or PA.)
3. Insert the flowmeter into the Pak-Lok body until the sensor tip
contacts the pipe wall (or support plug), twisting the flowmeter
back and forth.
4. Verify that the sensor tip made contact with the opposite
side pipe wall by removing the flowmeter and ensuring that
some of the marker has been rubbed off. For special-cleaned
sensors, look for wear marks on the tip. If the tip did not
touch the wall, verify the measured pipe ID and wall match the
tagging information and re-insert.
Serial No. Date
Model
Customer Tag
Pipe I.D. Wall
Max. Allow FlowRate
Max. Insert/Retract Flow
Max. Press. @ Temp
Span (20mA)
00-370000-2X1 Rev. AC
5. Align the flow arrow on the head with the direction of flow.
Re-insert the flow meter into the Pak-Lok body and install the
first packing ring on the sensor between the retaining ring and
the follower. Take care not to damage the split packing rings.
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Figure 4-1: Packing Ring Detail
A
C
B
D
A. Retaining ring
B. 3 x Packing rings
C. Follower
D. Compression plate
6. Push the packing ring into the Pak-Lok body and against the
weld retaining ring. Repeat this process for the two remaining
rings, alternating the location of the packing ring split by 120°.
a) Install the first packing ring underneath the follower.
b) Use the follower and the compression plate to
compress the first packing ring against the retaining
ring.
c) Install the second packing ring underneath the follower.
Alternate packing ring splits by 120° to each other.
d) Use the follower and the compression plate to
compress the second packing ring against the first
packing ring.
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e) Install the third packing ring underneath the follower.
f) Use the follower and the compression plate to
compress the third packing ring against the second
packing ring.
7. Tighten the nuts onto the studs:
a) Place the included split-ring lock washer between each
of the nuts and the compression plate. Give each nut
one half turn in succession until the split-ring lock
washer is flat between the nut and the compression
plate. Torque is as follows.
Table 4-1: Torque Requirements
Sensor size Torque
1 40 in-lb (4.5 N-m)
2 100 in-lb (11.3 N-m)
3 250 in-lb (28.2 N-m)
b) Inspect the unit for leakage. If any exists, tighten the
nuts in one-quarter turn increments until there is no
leakage.
Note
On sensor size 1, failure to use the split-ring Lock washers,
improper washer orientation, or over-tightening the nuts may
result in flowmeter damage.
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Figure 4-2: Split-Ring Lock Washer Orientation
Before
tightening
After tightening
 
Note
Pak-Lok sealing mechanisms generate significant force at
the point where the sensor contacts the opposite pipe wall.
Caution needs to be exercised on thin-walled piping (ANSI Sch
10 and lower) to avoid damage to the pipe.
8. Verify that a gap exists between the Table 4-2 compression
plate and the Pak-Lok body. If the gap is not within the
tolerances shown in, repeat Step6 and Step7 to ensure
the packing was installed correctly. If the gap is still not
within tolerances, contact your Emerson Process Management
representative for technical support.
Table 4-2: Minimum and Maximum Gap Dimensions
 Sensor size
1 2 3
Minimum gap in.
(mm)
0.52
(13.3)
0.52
(13.3)
1.19
(30.2)
Maximum gap in.
(mm)
1.25
(31.8)
1.93
(48.9)
1.93
(48.9)
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5 Mount the transmitter
5.1 Transmitter mounting, direct mount head with
valves
It is not necessary to retract the Rosemount Annubar when direct
mounting a transmitter with valves.
Procedure
1. Place PTFE O-rings into grooves on the Rosemount Annubar
head.
2. Align the high side of the transmitter to the high side of the
sensor (“Hi” is stamped on the side of the head) and install.
3. Tighten the nuts in a cross pattern to 384 in-lb (43 N-m).
5.2 Transmitter mounting with remote mount head
Temperatures in excess of 250 °F (121 °C) at the transmitter sensor
module diaphragms will damage the transmitter. Remote mounted
transmitters are connected to the sensor by means of impulse
piping, which allows process temperatures to decrease to a point
where the transmitter is no longer vulnerable.
Different impulse piping arrangements are used depending on the
process fluid and must be rated for continuous operation at the
pipeline design pressure and temperature. A minimum of 1/2-in.
(12 mm) outer diameter stainless steel tubing with a wall thickness
of at least 0.035-in. (0.9 mm) is recommended including and under
600# ANSI (DN50 PN100). Above 600# ANSI (DN50 PN100), stainless
steel tubing with 1/16-in. wall thickness. Threaded pipe fittings are
not recommended because they create voids where air can become
entrapped and create leakage points.
The following restrictions and recommendations apply to impulse
piping location:
Procedure
1. Impulse piping that runs horizontally must slope at least one
inch per foot (83 mm/m).
•Slope downward (toward the transmitter) for liquid and
steam applications.
•Slope upward (toward the transmitter) for gas applications.
2. Outdoor installations for liquid, saturated gas, or steam may
require insulation and heat tracing to prevent freezing.
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3. An instrument manifold is recommended for all installations.
Manifolds allow an operator to equalize the pressures prior to
zeroing and isolates the process fluid from the transmitter.
Figure 5-1: Valve Identification for 5-Valve and 3-Valve
Manifolds
5-valve manifold 3-valve manifold

To PH To PL
MV
ML
MEL
DVL
MH
MEH
DVH
2
1

To PL
ME
To PH
MH
DVH
ML
DVL
2
1
Table 5-1: Description of Impulse Valves and Components
Name Description Purpose
Components
1 Transmitter Reads Differential Pressure
2 Manifold Isolates and equalizes electronics
Manifold and impulse valves
PH Primary sensor(1) High and low side pressure process
connections.
PL Primary sensor(2)
DVH Drain/vent valve(1) Drains (for gas service) or vents (for
liquid or steam service) the DP sensor
diaphragms
DVL Drain/vent valve(2)
MH Manifold(1) Isolates high side or low side pressure
from the process
ML Manifold(2)
MEH Manifold
equalizer(1)
Allows high and low pressure side
access to the vent valve, or for
isolating the process fluid
MEL Manifold
equalizer(2)
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