Emerson Rosemount 3051HT Manual de usuario
Quick Start Guide
00825-0100-4091, Rev DB
April2023
Rosemount™ 3051HT Hygienic
Pressure Transmitter
with 4–20 mA HART®
Contents
About this guide...........................................................................................................................3
Transmitter installation...............................................................................................................5
Product certifications................................................................................................................ 19
Quick Start Guide April2023
2 Emerson.com/Rosemount
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.
Installation of device in an explosive environment must be in
accordance with appropriate local, national, and international
standards, codes, and practices. Review Product certifications for
any restrictions associated with a safe installation.
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 Transmitter installation
2.1 Mount the transmitter
Place the transmitter to the desired orientation before mounting.
Transmitter must not be securely mounted or clamped in place when
changing transmitter orientation.
Conduit entry orientation
When installing a Rosemount 3051HT, it is recommended installing
so a conduit entry faces downward or parallel to the ground to
maximize drainability when cleaning.
Environmental seal for housing
Thread sealing (PTFE) tape or paste on male threads of conduit is
required to provide a watertight/dustproof conduit seal and meets
requirements of NEMA® Type 4X, IP66, IP68, and IP69K. Consult
factory if other Ingress Protection ratings are required.
Note
IP69K rating only available on units with a SST housing and option
code V9 in the model string.
For M20 threads, install conduit plugs to full thread engagement or
until mechanical resistance is met.
In-line gauge transmitter orientation
The low side pressure port (atmospheric reference) on the in-line
gage transmitter is located on the neck of the transmitter via a
protected gage vent (See Figure 2-1).
Keep the vent path free from obstructions including but not limited
to paint, dust, and viscous fluids by mounting the transmitter so the
process can drain away.
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Quick Start Guide 5
Figure 2-1: In-line Protected Gage Vent Low Side Pressure Port
Aluminum Polished 316 SST
A. Low side pressure port (atmospheric reference)
Clamping
When installing clamp, follow recommended torque values provided
by gasket manufacturer.
Note
To maintain performance, torquing a 1.5-in. Tri Clamp beyond 50
in-lb. is not recommended on pressure ranges below 20 psi.
2.2 Set the switches
Prerequisites
Set alarm and security switch configuration before installation as
shown in Figure 2-2 and Figure 2-3.
•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 switch configuration:
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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 live.
3. Slide the security and alarm switches into the preferred
position using a small screwdriver.
4. Reattach the transmitter cover.
•The covers must only be capable of being released or
removed with the aid of a tool to comply with applicable
ordinary locations requirements.
•The cover must be fully engaged to comply with explosion-
proof requirements.
Figure 2-2: Transmitter Electronics Board - Aluminum
Without LCD display With LOI or LCD display
A. Alarm
B. Security
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Figure 2-3: Transmitter Electronics Board - Polished 316 SST
Without LCD display With LOI or LCD display
A. Alarm
B. Security
2.3 Connect the wiring and power up
Figure 2-4: Transmitter Wiring Diagrams (4–20 mA) - Aluminum
DP
A
B
D
E
C
A. Minimize distance
B. Trim shield and insulate
C. Protective grounding terminal
D. Insulate shield
E. Connect shield back to the power supply ground
Quick Start Guide April2023
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Figure 2-5: Transmitter Wiring Diagrams (4–20 mA) - Polished 316
SST
DP
A
B
D
E
C
A. Minimize distance
B. Trim shield and insulate
C. Protective grounding terminal
D. Insulate shield
E. Connect shield back to the power supply ground
Shielded twisted pair cable should be used for best results. Use 24
AWG or larger wire that does not exceed 5,000 ft. (1,500 m) in length.
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.
CAUTION
•Installation of the transient protection terminal block does not
provide transient protection unless the Rosemount 3051HT case
is properly grounded.
•Do not run signal wiring in conduit or open trays with power
wiring, or near heavy electrical equipment.
•Do not connect the powered signal wiring to the test terminals.
Power could damage the test diode in the terminal block.
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.
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Quick Start Guide 9
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.
Note
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. Ground housing to fulfill local grounding regulations.
5. Ensure proper grounding. It is important that the instrument
cable shield be:
•Trimmed close and insulated from touching the transmitter
housing
•Connected to the next shield if cable is routed through a
junction box
•Connected to a good earth ground at the power supply end
6. If transient protection is needed, refer to section Grounding
for transient terminal block for grounding instructions.
7. Plug and seal unused conduit connections.
8. Reattach the transmitter covers.
•The covers must only be capable of being released or
removed with the aid of a tool to comply with applicable
ordinary locations requirements.
•The cover must be fully engaged to comply with explosion-
proof requirements.
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