Emerson Rosemount 2051CF series User manual

Quick Start Guide
00825-0100-4107, Rev FC
May2023
Rosemount™ 2051 Pressure
Transmitter and Rosemount 2051CF
Series Flow Meter
with 4–20 mA HART® and 1–5 Vdc Low
Power HART Protocol (Revision 5 and 7)

Safety messages
This guide provides basic guidelines for this product. It does not provide instructions
for configuration, diagnostics, maintenance, service, troubleshooting, Explosion-proof,
Flameproof, or intrinsically safe (I.S.) installations.
WARNING
Explosions could result in death or serious injury.
Installation of this transmitter in an explosive environment must be in accordance with the
appropriate local, national, and international standards, codes, and practices. Review the
approvals section of this manual for any restrictions associated with a safe installation.
Before connecting a handheld communicator in an explosive atmosphere, be sure that the
instruments in the loop are installed in accordance with intrinsically safe or non-incendive
field wiring practices.
In an explosion-proof/flameproof installation, do not remove the transmitter covers when
power is applied to the unit.
WARNING
Process leaks could result in death or serious injury.
Install and tighten process connectors before applying pressure.
Do not attempt to loosen or remove flange bolts while the transmitter is in service.
WARNING
Electrical shock can result in death or serious injury.
Avoid contact with the leads and terminals. High voltage that may be present on leads can
cause electrical shock.
Before connecting a handheld communicator in an explosive atmosphere, be sure that the
instruments in the loop are installed in accordance with intrinsically safe or non-incendive
field wiring practices.
In an explosion-proof/flameproof installation, do not remove the transmitter covers when
power is applied to the unit.
WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or
misconfiguration of end users’ equipment. This could be intentional or unintentional and
needs to be protected against.
Physical security is an important part of any security program and fundamental in protecting
your system. Restrict physical access by unauthorized personnel to protect end users’ assets.
This is true for all systems used within the facility.
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WARNING
Replacement equipment or spare parts not approved by Emerson for use as spare parts
could reduce the pressure retaining capabilities of the transmitter and may render the
instrument dangerous.
Use only bolts supplied or sold by Emerson as spare parts.
WARNING
Improper assembly of manifolds to traditional flange can damage sensor module.
For safe assembly of manifold to traditional flange, bolts must break back plane of flange
web (i.e., bolt hole) but must not contact sensor module housing.
NOTICE
The products described in this document are NOT designed for nuclear-qualified
applications. Using non-nuclear qualified products in applications that require nuclear-
qualified hardware or products may cause inaccurate readings. For information on
Rosemount nuclear-qualified products, contact your local Emerson Sales Representative.
Contents
System readiness......................................................................................................................... 5
Mount the transmitter.................................................................................................................6
Rotate housing........................................................................................................................... 13
Set the switches......................................................................................................................... 14
Connect the wiring and power up........................................................................................... 16
Verifying configuration............................................................................................................. 19
Zero trim the transmitter..........................................................................................................23
Safety instrumented systems...................................................................................................27
Rosemount 2051 product certifications..................................................................................28
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1 System readiness
1.1 Confirm HART® Revision capability
If using HART based control or asset management systems, confirm
the HART capability of those systems prior to transmitter installation.
Not all systems are capable of communicating with HART Revision 7
protocol. This transmitter can be configured for either HART Revision
5 or 7.
Related information
Switch HART Revision mode
1.2 Confirm correct device driver
•Verify the correct device driver (DD/DTM™) is loaded on your
systems to ensure proper communications.
•Download the correct device driver at your host vendor download
site, Emerson.com/DeviceInstallKits or FieldCommGroup.org.
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2 Mount the transmitter
2.1 Liquid applications
Procedure
1. Place taps to the side of the line.
2. Mount beside or below the taps.
3. Mount the transmitter so the drain/vent valves are oriented
upward.
2.2 Gas applications
Procedure
1. Place taps on the top or side of the line.
2. Mount beside or above the taps.
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2.3 Steam applications
Procedure
1. Place taps to the side of the line.
2. Mount beside or below the taps.
3. Fill impulse lines with water.
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2.4 Panel and pipe mounting
Figure 2-1: Panel and pipe mounting
Panel mount(1) Pipe mount
Coplanar flange
Traditional flange

Rosemount 2051T
(1) 5/16 × 1½ panel bolts are customer supplied.
2.5 Bolting considerations
If the transmitter installation requires assembly of the process
flanges, manifolds, or flange adapters, follow the assembly
guidelines to ensure a tight seal for optimal performance
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characteristics of the transmitters. Use only bolts supplied with the
transmitter or sold by Emerson as spare parts. Figure 2-2 illustrates
common transmitter assemblies with the bolt length required for
proper transmitter assembly.
Figure 2-2: Common transmitter assemblies
A
4 × 1.75-in.
(44 mm)
D
4 × 1.75-in.
(44 mm)
4 × 2.25-in.
(57 mm)
C
4 ×1.75-in.
(44 mm) 4 ×1.50-in.
(38 mm)
B
4 × 2.88-in.
(73 mm)
A. Transmitter with coplanar flange
B. Transmitter with coplanar flange and optional flange adapters
C. Transmitter with traditional flange and optional flange adapters
D. Transmitter with coplanar flange and optional manifold and
flange adapters
Bolts are typically carbon steel (CS) or stainless steel (SST). Confirm
the material by viewing the markings on the head of the bolt and
referencing Table 2-1. If bolt material is not shown in Table 2-1,
contact a local Emerson representative for more information.
Carbon steel bolts do not require lubrication and the stainless steel
bolts are coated with a lubricant to ease installation. However, no
additional lubricant should be applied when installing either type of
bolt.
Use the following bolt installation procedure:
Procedure
1. Tighten the bolts by hand.
2. Torque the bolts to the initial torque value using a crossing
pattern.
See Table 2-1 for initial torque value.
3. Torque the bolts to the final torque value using the same
crossing pattern.
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See Table 2-1 for final torque value.
4. Verify the flange bolts are protruding through the sensor
module bolt holes before applying pressure.
Table 2-1: Torque values for the flange and flange adapter bolts
Bolt
material
Head markings Initial
torque
Final torque
CS
B7M

300 in-lb 650 in-lb
SST
316
316
316
SW
316
STM
316
R
B8M

150 in-lb 300 in-lb
2.6 O-rings
The two styles of Rosemount flange adapters (Rosemount
3051/2051/2024/3095) each require a unique O-ring (see Figure 2-3).
Use only the O-ring designed for the corresponding flange adapter.
WARNING
Failure to install proper flange adapter O-rings may cause process
leaks, which can result in death or serious injury.
The two flange adapters are distinguished by unique O-ring grooves.
Only use the O-ring that is designed for its specific flange adapter, as
shown below. When compressed, PTFE O-rings tend to cold flow,
which aids in their sealing capabilities.
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