Emerson Rosemount 3051 User manual

Quick Start Guide
00825-0100-4007, Rev HG
December2023
Rosemount™ 3051 Pressure
Transmitter and 3051CF Series Flow
Meter
with 4-20 mA HART®

Contents
About this guide...........................................................................................................................3
Mounting the transmitter........................................................................................................... 5
Rotate housing........................................................................................................................... 13
Set the switches......................................................................................................................... 14
Connect the wiring and power up........................................................................................... 16
Verify configuration parameters..............................................................................................21
Trimming the transmitter......................................................................................................... 25
Safety Instrumented Systems (SIS)..........................................................................................27
Product certifications................................................................................................................ 28
Quick Start Guide December2023
2 Emerson.com

1 About this guide
This guide provides basic guidelines for Rosemount 3051
Transmitters.
It does not provide instructions for configuration, diagnostics,
maintenance, service, troubleshooting, explosion-proof, flameproof,
or Intrinsically Safe (IS) installations. Refer to the Rosemount 3051
Pressure Transmitter Manual for more instructions. This guide and
the referenced manual are also available on Emerson.com.
1.1 Safety messages
WARNING
Explosions
Explosions could result in death or serious injury.
Before connecting a communication device in an explosive
atmosphere, ensure that the instruments are installed in
accordance with intrinsically safe or non-incendive field wiring
practices.
In an explosion-proof/flame-proof installation, do not remove the
transmitter covers when power is applied to the transmitter.
WARNING
Process leaks
Process leaks may cause harm or result in death.
To avoid process leaks, only use the O-ring designed to seal with
the corresponding flange adapter.
WARNING
Electrical shock
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.
December2023 Quick Start Guide
Quick Start Guide 3

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.
NOTICE
Conduit/cable entries
Unless otherwise marked, the conduit/cable entries in the housing
enclosure use a ½–14 NPT form. Only use plugs, adapters, glands, or
conduit with a compatible thread form when closing these entries.
Entries marked M20 are M20 × 1.5 thread form. On devices with
multiple conduit entries, all entries will have the same thread form.
When installing in a hazardous location, use only appropriately listed
or Ex certified plugs, glands, or adapters in cable/conduit entries.
Quick Start Guide December2023
4 Emerson.com

2 Mounting the transmitter
WARNING
Process connection temperatures above +185 °F (+85 °C) require a
limited ambient temperature, reduced by a 1:1.5 ratio.
Consider process connection and ambient temperatures when
installing the 3051 with hazardous location certifications. See Table
2-1.
Table 2-1: Intrinsically safe/increased safety
Process connection temperature Maximum ambient temperature
-76 to +185 °F (-60 to +85 °C) +158 °F (+70 °C)
+185 to +250 °F (+85 to +121 °C) +158 to +320 °F (+70 to +160 °C)(1)
(1) Maximum ambient temperature is reduced by a ratio of 1:1.5 as process
connection temperature increased beyond +185 °F (+85 °C).
2.1 Mount the transmitter in a liquid flow application
Procedure
1. Place taps to the side of the line.
2. Mount the transmitter beside or below the taps.
December2023 Quick Start Guide
Quick Start Guide 5

3. Mount the transmitter so that the drain/vent valves are
oriented upward.
2.2 Mount the transmitter in a gas flow application
NOTICE
A bracket is required to support the transmitter and the ¼-inch
tubing going into the transmitter.
Procedure
1. Place taps in the top or side of the line.
Quick Start Guide December2023
6 Emerson.com

2. Mount the transmitter beside or above the taps.
2.3 Steam flow applications
Procedure
1. Place taps to the side of the line.
2. Mount beside or below the taps.
3. Fill impulse lines with water.
December2023 Quick Start Guide
Quick Start Guide 7

2.4 Panel and pipe mount
Figure 2-1: Panel and Pipe Mounting
Panel mount(1) Pipe mount
Coplanar flange
Traditional flange
Rosemount 3051T
Rosemount 3051H
(1) 5/16 x 1½ panel bolts are customer supplied.
Quick Start Guide December2023
8 Emerson.com

2.5 Bolting considerations
If the transmitter installation requires assembly of the process
flanges, manifolds, or flange adapters, follow these assembly
guidelines to ensure a tight seal for optimal performance
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 or stainless steel. Confirm the material
by viewing the markings on the head of the bolt and referencing
Table 2-2. If bolt material is not shown in Table 2-2, contact your local
Emerson representative for more information.
2.5.1 Install bolts
NOTICE
Carbon steel bolts do not require lubrication and the stainless steel
bolts are coated with a lubricant to ease installation. Do not apply any
additional lubricant when installing either type of bolt.
December2023 Quick Start Guide
Quick Start Guide 9

Procedure
1. Finger-tighten the bolts.
2. Torque the bolts to the initial torque value using a crossing
pattern (see Table 2-2 for torque values).
3. Torque the bolts to the final torque value using the same
crossing pattern (see Table 2-2 for torque values).
4. Verify that the flange bolts are protruding through the isolator
plate before applying pressure.
Table 2-2: Torque values for the flange and flange adapter
bolts
Bolt
material
Head markings Initial
torque
Final
torque
Carbon
steel (CS)
B7M
 300 in-lb 650 in-lb
Stainless
steel (SST)
316
316
316
SW
316
STM
316
R
B8M

150 in-lb 300 in-lb
2.6 O-rings with flange adapters
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 in Figure 2-3.
Quick Start Guide December2023
10 Emerson.com

Figure 2-3: O-ring location
A
B
C
D
Rosemount 3051S/3051/2051
A. Flange adapter
B. O-ring
C. PFTE-based profile (square)
D. Elastomer profile (round)
Note
Whenever the flanges or adapters are removed, visually inspect the
O-rings. Replace them if there are any signs of damage, such as nicks
or cuts. If you replace the O-rings, re-torque the flange bolts and
alignment screws after installation to compensate for seating of the
PTFE O-ring.
2.7 Environmental seal for housing
For NEMA® 4X, IP66, and IP68 requirements, use thread sealing PTFE
tape or paste on male threads of conduit to provide a water and
dust tight seal. Consult factory if other ingress protection ratings are
required.
For M20 threads, install conduit plugs to full thread engagement or
until mechanical resistance is met.
2.8 In-line gauge transmitter orientation
The low side pressure port (atmospheric reference) on the in-line
gauge transmitter is located in the neck of the transmitter, behind
the housing.
The vent path is 360° around the transmitter between the housing
and sensor. (See Figure 2-4.)
Keep the vent path free of any obstruction, including but not limited
to paint, dust, and lubrication, by mounting the transmitter so that
fluids can drain away.
December2023 Quick Start Guide
Quick Start Guide 11

Figure 2-4: In-line gauge low side pressure port
A
A. Pressure port location
Quick Start Guide December2023
12 Emerson.com

3 Rotate housing
To improve field access to wiring or to better view the optional
display:
Procedure
1. Loosen the housing rotation set screw using a 5/64-inch hex
wrench.
2. Turn the housing left or right up to a maximum of 180° from
its original position.(1)
3. Re-tighten the housing rotation set screw to a maximum of 7
in-lb when desired location is reached.
NOTICE
Over-rotating will damage the transmitter.
Figure 3-1: Housing rotation
A
A. Housing rotation set screw (5/64-inch)
(1) Rosemount 3051C original position aligns with "H" side; Rosemount 3051T
original position is the opposite side of the bracket holes.
December2023 Quick Start Guide
Quick Start Guide 13

4 Set the switches
Set Alarm and Security switch configuration before installation, as
shown in Figure 4-1.
Figure 4-1: Electronics board
Without LCD display With LCD display
A. Alarm
B. Security
•The Alarm switch sets the analog output alarm to high or low.
•Default Alarm is high.
•The Security switch allows ( ) or prevents ( ) any
configuration of the transmitter.
•Default Security is off ( ).
To change the switch configuration:
Procedure
1. If the transmitter is installed, secure the loop, and remove
power.
2. Remove the housing cover opposite the field terminal side.
WARNING
Do not remove the instrument cover in explosive atmospheres
when the circuit is live.
3. Slide the Security and Alarm switches into the preferred
position using a small screwdriver.
Quick Start Guide December2023
14 Emerson.com

4. Reattach the transmitter cover.
WARNING
The cover must be fully engaged to comply with explosion-
proof requirements.
December2023 Quick Start Guide
Quick Start Guide 15

5 Connect the wiring and power up
Figure 5-1 shows wiring connections necessary to power a
Rosemount 3051 Transmitter and enable communications with a
communication device.
Figure 5-1: Transmitter wiring diagrams
A. Power supply
B. Ground
C. Resistor
Table 5-1: Power supply and resistance needs by communicator
type
Communicator Power supply Resistor
AMS Device Manager ≥ 16.6 Vdc ≥ 250 Ω
AMS Trex (HART®)≥ 16.6 Vdc ≥ 250 Ω
AMS Trex (HART + pwr) None None
AMS Device
Configurator
Bluetooth® App
≥ 10.5 Vdc None
Quick Service buttons ≥ 10.5 Vdc None
Local operator interface
(LOI) ≥ 10.5 Vdc None
Resistance and power requirements vary based on the interface type
used to communicate with the device. See Table 5-1 for specific loop
power and resistance needs.
Quick Start Guide December2023
16 Emerson.com

To wire the transmitter:
Procedure
1. Remove the housing cover on the field terminals side.
2. Connect the positive lead to the “+” terminal (PWR/COMM) and
the negative lead to the “–” terminal.
3. Ensure full contact with terminal block screw and washer.
When using a direct wiring method, wrap wire clockwise to
ensure it is in place when tightening the terminal block screw.
NOTICE
Emerson does not recommend using a pin or a ferrule wire, as
the connection may be more susceptible to loosening over
time or under vibration.
4. Ensure proper grounding.
NOTICE
It is important that the instrument cable shield:
Be trimmed close and insulated from touching the
transmitter housing
Be connected to the next shield if cable is routed through a
junction box
Be connected to a good earth ground at the power supply
end
Do not connect the powered signal wiring to the test
terminals. Power could damage the test diode in the test
connection. Use shielded twisted pair cable for best results.
Use 24 AWG or larger wire and do not exceed 5,000 ft.
(1500m).
5. Plug and seal unused conduit connections.
6. If applicable, install wiring with a drip loop. Arrange the drip
loop sothebottom is lower than the conduit connections and
the transmitterhousing.
7. Replace the housing cover.
December2023 Quick Start Guide
Quick Start Guide 17

NOTICE
Installation of the transient protection terminal block does not
provide transient protection unless the transmitter enclosure
is properly grounded.
5.1 Ground signal wiring
WARNING
Do not run signal wiring in conduit or open trays with power wiring
or near heavy electrical equipment.
Grounding terminations are provided on the outside of the
electronics housing and inside the terminal compartment. Use these
terminations when transient protect terminal blocks are installed or
to fulfill local regulations. See Step2 for more information on how
the cable shield should be grounded.
Procedure
1. Remove the field terminals housing cover.
2. Connect the wiring pair and ground as indicated in Figure 5-2.
Make sure the wiring is:
•Trimmed close and insulated from touching the transmitter
housing
•Continuously connected to the termination point
•Connected to a good earth ground at the power supply end
Quick Start Guide December2023
18 Emerson.com

Figure 5-2: Wiring
A. Minimize distance
B. Trim shield and insulate
C. Ground for transient protection
D. Shield connected to power supply ground
E. Insulate shield
3. Replace the housing cover.
NOTICE
Emerson recommends tightening the cover until there is no
gap between the cover and the housing.
4. Plug and seal unused conduit connections.
5.2 Power supply for a 4-20 mA HART®
The transmitter operates on 10.5 to 42.4Vdc at the terminal of the
transmitter. The DC power supply should provide power with less
than two percent ripple. Loops with a 250 Ω resistance require a
minimum of 16.6 V.
Note
The transmitter must have a minimum of 250 Ω to communicate
with a communication device. If you are using a single power supply
to power more than one Rosemount 3051 Transmitter, ensure the
power supply used and the circuitry common to the transmitters do
not have more than 20 Ω of impedance at 1200 Hz.
December2023 Quick Start Guide
Quick Start Guide 19

Figure 5-3: Load limitation
Maximum loop resistance = 43.5 x (power supply voltage - 10.5)
A. Load (Ω)
B. Voltage (Vdc)
C. Operating region
The total resistance load is the sum of the resistance of the signal
leads and the load resistance of the controller, indicator, intrinsically
safe (IS) barriers, and related pieces. If you use IS barriers, then
include the resistance and voltage drop.
Quick Start Guide December2023
20 Emerson.com