Emerson Rosemount 3051 Series User manual

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

Contents
About this guide...........................................................................................................................3
Mounting the transmitter........................................................................................................... 5
Housing rotation........................................................................................................................13
Set the switches......................................................................................................................... 14
Connect the wiring and power up........................................................................................... 15
Configuration parameters........................................................................................................ 19
Trim the transmitter.................................................................................................................. 22
Safety Instrumented Systems (SIS)..........................................................................................24
Product certifications................................................................................................................ 25
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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,
Flame-Proof, or intrinsically safe (I.S.) installations. Refer to the
Rosemount 3051 Manual for more instructions. This guide is also
available electronically on Emerson.com/Rosemount.
1.1 Safety messages
DANGER
Explosions
Explosions could result in death or serious injury.
Before connecting a handheld communicator 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/flameproof installation, do not remove the
transmitter covers when power is applied to the unit.
DANGER
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.
DANGER
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.
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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.
CAUTION
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.
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2 Mounting the transmitter
NOTICE
Consider process connection and ambient temperatures when
installing the 3051 with hazardous location certifications. Process
connection temperatures above +85 °C require a limited ambient
temperature, reduced by a 1:1.5 ratio. See Table 2-1.
Table 2-1: Intrinsically safe/increased safety
Process connection temperature Maximum ambient temperature
-60 °C to +85 °C +70 °C
+85 °C to +121 °C +70 °C to +16 °C(1)
(1) Maximum ambient temperature is reduced by a ratio of 1:1.5 as process
connection temperature increased beyond +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.
3. Mount the transmitter so that the drain/vent valves are
oriented upward.
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2.2 Mount the transmitter in a gas flow application
NOTICE
A bracket required to support the transmitter and the ¼-in. tubing
going into the transmitter.
Procedure
1. Place taps in the top or side of the line.
2. Mount the transmitter beside or above the taps.
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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.
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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.
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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 the local
Emerson representative for more information.
2.5.1 Bolt installation
Note
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.
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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
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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 below.
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)
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.
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2.8 In-line gage transmitter orientation
The low side pressure port (atmospheric reference) on the in-line
gage 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.
Figure 2-4: In-line Gage Low Side Pressure Port
A
A. Pressure port location
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3 Housing rotation
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-in. 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.
Note
Over-rotating will damage the transmitter.
Figure 3-1: Housing Rotation
A
A. Housing rotation set screw (5/64-in.)
(1) Rosemount 3051C original position aligns with "H" side; Rosemount 3051T
original position is the opposite side of the bracket holes.
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4 Set the switches
Set alarm and security switch configuration before installation as
shown in Figure 4-1.
•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 ( ).
Use the following procedure to change the swicth configuration:
Procedure
1. If the transmitter is installed, secure the loop, and remove
power.
2. Remove the housing cover opposite the field terminal side.
Do not remove the instrument cover in explosive atmospheres
when the circuit is alive.
3. Slide the security and alarm switches into the preferred
position using a small screwdriver.
4. Reattach the transmitter cover. The cover must be fully
engaged to comply with explosion-proof requirements.
Figure 4-1: Electronics Board
Without LCD display With LCD display
A. Alarm
B. Security
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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
handheld communicator. 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.
Use the following steps 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.
The use of a pin or a ferrule wire terminal is not recommended
as the connection may be more susceptible to loosening over
time or under vibration.
4. Ensure proper grounding.
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. Shielded twisted pair cable should be used 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.
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Figure 5-1: Transmitter Wiring Diagrams
Note
Installation of the transient protection terminal block does
not provide transient protection unless the Rosemount 3051
transmitter enclosure is properly grounded.
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 ≥ 10.5 Vdc none
5.1 Signal wiring grounding
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. These grounds are used when transient
protect terminal blocks are installed or to fulfill local regulations.
See Step2 for more information on how the cable shieldshould be
grounded.
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Procedure
1. Remove the field terminals housing cover.
2. Connect the wiring pair and ground as indicated in Figure 5-2.
•Be trimmed close and insulated from touching the
transmitter housing
•Continuously connect to the termination point
•Be connected to a good earth ground at the power supply
end
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.
It is recommended the cover be tightened 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 10.5–42.4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 Field Communicator. If you are using a single power supply to
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power more than one Rosemount 3051 Transmitter, make sure the
power supply used and the circuitry common to the transmitters do
not have more than 20 Ω of impedance at 1200 Hz.
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, I.S. barriers,
and related pieces. If you use intrinsic safety barriers, include the
resistance and voltage drop.
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6 Configuration parameters
Emerson recommends that you verify various configuration
parameters prior to installation into the process.
•Alarm and saturation levels
•Damping
•Process variables
•Range values
•Tag
•Transfer function
•Units
Complete the following steps to verify these parameters. See Figure
6-1 for a full menu tree.
Note
Emerson recommends installing the latest DD to ensure full
functionality. Download the latest DD at Software Downloads &
Drivers | Emerson US.
Communication Device
Procedure
1. Alarm and saturation values
•Device Settings → Setup Overview → Alarm and Saturation
Values
2. Damping
•Device Settings → Setup Overview → Output
3. Process variables
•Primary variable: Device Settings → Setup Overview →
Output
•Secondary/Tertiary/Quaternary variables: Device Settings
→ Communication → HART → Variable Mapping
4. Range values
•Device Settings → Setup Overview → Output
5. Tag
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•Device Settings → Setup Overview → Device
6. Transfer function
•Device Settings → Setup Overview → Output
7. Units
•Pressure units: Device Settings → Setup Overview →
Output
•Other units: Device Settings → Output → Pressure/Flow/
Totalizer/Level/Volume/Module Temperature → Setup
Figure 6-1: DD Menu Tree
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