Emerson Rosemount 2051HT User manual

Quick Start Guide
00825-0100-4591, Rev BA
March 2018
Rosemount™2051HT Hygienic Pressure
Transmitter
with 4–20 mA HART®Revision 5 and 7 Protocol
Note
Before installing the transmitter, confirm the correct device driver is loaded on the host
systems. See page 3 for system readiness.

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Quick Start Guide
4
NOTICE
This guide provides basic guidelines for the Rosemount 2051HT Transmitter. It does not provide instructions
for configuration, diagnostics, maintenance, service, troubleshooting, Explosion-proof, Flameproof, or
intrinsically safe (I.S.) installations.
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.
Before connecting a HART®-based communicator in an explosive atmosphere, make sure the instruments in
the loop are installed in accordance with intrinsically safe or non-incendive field wiring practices.
Process leaks may cause harm or result in death.
To avoid process leaks, only use the gasket designed to seal with the corresponding flange adapter.
Electrical shock can result in death or serious injury.
Avoid contact with the leads and the terminals. High voltage that may be present on leads can cause electrical
shock.
Conduit/cable entries
Aluminum housings: Unless marked, the conduit/cable entries in the transmitter housing use a 1/2–14 NPT
thread form.
Stainless steel (SST) housings: conduit/cable entries can be determined by crossing referencing the model
string printed on the transmitter with the ordering table listed in the Product Data Sheet. Conduit type is
not cast into the transmitter housing to minimize surface irregularities.
Only use plugs, adapters, glands, or conduit with a compatible thread form when closing these entries.
Contents
System readiness . . . . . . . . . . . . . . . . . . . . . . . . . 3
Transmitter installation . . . . . . . . . . . . . . . . . . . 3
Mount the transmitter . . . . . . . . . . . . . . . . . . . . 3
Set the switches . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Connect the wiring and power up . . . . . . . . . . 6
Verify configuration . . . . . . . . . . . . . . . . . . . . . . 8
Trim the transmitter . . . . . . . . . . . . . . . . . . . . . 11
Product certifications . . . . . . . . . . . . . . . . . . . . 14

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1.0 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.
For instructions on how to change the HART Revision of your transmitter, see
page 11.
1.2 Confirm correct device driver
Verify the latest device driver (DD/DTM™) is loaded on your systems to
ensure proper communications.
Download the latest device driver at Emerson.com or FieldCommGroup.org.
Rosemount 2051 device revisions and drivers
Table 1 provides the information necessary to ensure you have the correct
device driver and documentation for your device.
2.0 Transmitter installation
2.1 Mount the transmitter
Orient the transmitter to 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 2051HT, it is recommended installing so the
conduit entry faces downward towards the ground to maximize drain ability
when cleaning.
Table 1. Rosemount 2051 Device Revisions and Files
Identify device Find device driver Review
instruction
Review
functionality
Software
release
date
NAMUR
software
revision(1)
1. NAMUR software revision is located on the hardware tag of the device. In accordance with NE53,
revisions of the least significant level X (of 1.0.X) do not change functionality or operation of the
device and will bot be reflected in this device revision history.
HART
software
revision(2)
2. HART software revision can be read using a HART capable configuration tool.
HART
universal
revision
Device
revision
Reference
manual
Changes to
software
Dec-11 1.0.0 01
710 Rosemount
2051
Pressure
Transmitter
Reference
Manual
N/A
5 9

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Quick Start Guide
Environmental seal for housing
Thread sealing (PTFE) tape or paste on male threads of conduit is required to
provide a water/dust tight conduit seal and meets requirements of NEMA®Type
4X, IP66, IP68, and IP69K. 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.
Note
IP69K rating only available on units with a SST housing and option code V9 in the model
string.
Note
For aluminum housings ordered with M20 conduit entries, transmitters shipped will have
1/2NPT threads machined into the housing and a 1/2NPT to M20 thread adapter will be
provided. Considerations for environmental sealing listed above should be taken into
account when installing the thread adapter.
In-line gage 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 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.
Recommended installations have a conduit entry facing the ground so the gage
vent is pointing parallel to the ground.
Figure 1. In-line Protected Gage Vent Low Side Pressure Port
A. Low side pressure port (atmospheric reference)
Aluminum Polished 316 SST
A

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Clamping
When installing clamp, follow recommended torque values provided by gasket
manufacturer.(1)
2.2 Set the switches
Set alarm and security switch configuration before installation as shown in
Figure 2.
The alarm switch sets the analog output alarm to high or low.
- Default alarm is high.
The security switch allows (unlocked symbol) or prevents (locked symbol)
any configuration of the transmitter.
- Default security is off (unlocked symbol).
Use the following procedure to change the switch configuration:
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. It is recommended that the cover be
tightened until there is no gap between the cover and the housing.
The covers must only be capable of being released or removed with the aid
of a tool to comply with applicable ordinary locations requirements.
Figure 2. Transmitter Electronics Board
A. Alarm
B. Security
1. To maintain transmitter performance, torquing a 1.5-in. Tri-Clamp beyond 50 in-lb is not recommended on pressure
ranges below 20 psi.
Without LCD display With LOI or LCD display
Aluminum
Polished 316 SST
A
B
A
B

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Quick Start Guide
2.3 Connect the wiring and power up
Figure 3. Transmitter Wiring Diagrams (4–20 mA)
A. 24 Vdc supply
B. RL ≥250
C. Current meter (optional)
Shielded twisted pair cable should be used for best results. Use 24 AWG or larger
wire that does not exceed 5,000 ft. (1500 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.
Aluminum
Polished 316 SST
A
B
C
A
B
C

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Use the following steps to wire the transmitter:
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.
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 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. It is recommended that the cover be
tightened until there is no gap between the cover and the housing.
The covers must only be capable of being released or removed with the aid of
a tool to comply with applicable ordinary locations requirements.
Installation of the transient protection terminal block does not provide transient protection unless the
Rosemount 2051HT 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.

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Quick Start Guide
Figure 4. Wiring
Grounding for transient terminal block
Ground termination is provided on the outside of the electronics housing and
inside the terminal compartment. These grounds are used when the transient
protection terminal blocks are installed. It is recommended that 18 AWG or
larger wire is used to connect housing ground to earth ground (internal or
external).
If the transmitter is currently not wired for power up and communication, follow
Connect the wiring and power up ,step 1through 8. When the transmitter is
properly wired, refer to Figure 4 for internal and external transient grounding
locations.
Note
The Rosemount 2051HT polished 316 SST housing only provides ground termination
inside the terminal compartment.
2.4 Verify configuration
Verify the configuration using any HART capable configuration tool or Local
Operator Interface (LOI) - option code M4. Configuration instructions for a Field
Communicator and LOI are included in this step.
Verifying configuration with a Field Communicator
A Rosemount 2051 DD must be installed on the Field Communicator to verify
configuration. Fast Key sequences for the latest DD are shown in Table 2 on
page 9. For Fast Key sequences using legacy DD's, contact your local Emerson™
representative.
Aluminum Polished 316 SST
A. Minimize distance
B. Trim shield and insulate
C. Protective grounding terminal
D. Insulate shield
E. Connect shield back to the power supply ground
DP
A
B
D
E
C
DP
A
B
D
E
C

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March 2018
Note
Emerson recommends installing the latest DD to access the complete functionality. Visit
Emerson.com/Field-Communicator for information on updating the DD Library.
1. Verify device configuration using the Fast Key sequences in Table 2.
A check () indicates the basic configuration parameters. At minimum,
these parameters should be verified as part of configuration and startup.
Table 2. Device Revision 9 and 10 (HART7), DD Revision 1 Fast Key Sequence
Function Fast Key sequence
HART 7 HART 5
Alarm and Saturation Levels 2, 2, 2, 5, 7 2, 2, 2, 5, 7
Damping 2, 2, 1, 1, 5 2, 2, 1, 1, 5
Range Values 2, 2, 2 2, 2, 2
Tag 2, 2, 7, 1, 1 2, 2, 7, 1, 1
Transfer Function 2, 2, 1, 1, 6 2, 2, 1, 1, 6
Units 2, 2, 1, 1, 4 2, 2, 1, 1, 4
Burst Mode 2, 2, 5, 3 2, 2, 5, 3
Custom Display Configuration 2, 2, 4 2, 2, 4
Date 2, 2, 7, 1, 4 2, 2, 7, 1, 3
Descriptor 2, 2, 7, 1, 5 2, 2, 7, 1, 4
Digital to Analog Trim (4–20 mA output) 3, 4, 2 3, 4, 2
Disable Configuration Buttons 2, 2, 6, 3 2, 2, 6, 3
Rerange with Keypad 2, 2, 2, 1 2, 2, 2, 1
Loop Test 3, 5, 1 3, 5, 1
Lower Sensor Trim 3, 4, 1, 2 3, 4, 1, 2
Message 2, 2, 7, 1, 6 2, 2, 7, 1, 5
Scaled D/A Trim (4–20 mA output) 3, 4, 2 3, 4, 2
Sensor Temperature/Trend 3, 3, 2 3, 3, 2
Upper Sensor Trim 3, 4, 1, 1 3, 4, 1, 1
Digital Zero Trim 3, 4, 1, 3 3, 4, 1, 3
Password 2, 2, 6, 5 2, 2, 6, 4
Scaled Variable 3, 2, 2 3, 2, 2
HART Revision 5 to HART Revision 7 switch 2, 2, 5, 2, 3 2, 2, 5, 2, 3
Long Tag(1)
1. Only available in HART Revision 7 mode.
2, 2, 7, 1, 2 N/A
Find Device13, 4, 5 N/A
Simulate Digital Signal13, 4, 5 N/A

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Quick Start Guide
Verifying configuration with LOI
The optional LOI can be used for commissioning the device. The LOI is a
two-button design with internal and external/rear buttons. On a polished
stainless steel housing, buttons are located internally both on the display and
terminal side of the transmitter. On an aluminum housing, buttons are located
on the display and externally underneath the top metal tag. To activate the LOI,
push any button. LOI button functionality is shown on the bottom corners of the
display. See Table 3 and Figure 5 for button operation and menu information.
Figure 5. LOI Menu
Table 3. LOI Button Operation
Button
Left No SCROLL
Right Yes ENTER
Assign PV
HART Revision

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Switch HART Revision mode
If the HART configuration tool is not capable of communicating with HART
Revision 7, the Rosemount 2051 will load a generic menu with limited
capability. The following procedures will switch the HART Revision mode from
the generic menu:
1. Manual Setup > Device Information > Identification > Message
a.To change to HART Revision 5, Enter: HART5 in the Message field.
b.To change to HART Revision 7, Enter: HART7 in the Message field.
Note
See Table 2 on page 9 to change HART Revision when the correct device driver is
loaded.
2.5 Trim the transmitter
Devices are calibrated by the factory. Once installed, it is recommended to
perform a zero trim on gage transmitters to eliminate error due to mounting
position or static pressure effects. A zero trim can be performed using either a
Field Communicator or configuration buttons.
Note
When performing a zero trim, ensure the equalization valve is open and all wet
legs are filled to the correct level.
1. Choose your trim procedure.
a. Analog zero trim – Sets the analog output to 4 mA.
b. Also referred to as a “rerange,” it sets the lower range value (LRV) equal to
the measured pressure.
c. The display and digital HART output remains unchanged.
d. Digital zero trim – Recalibrates the sensor zero.
e. The LRV is unaffected. The pressure value will be zero (on display and
HART output). 4 mA point may not be at zero.
f. This requires the factory calibrated zero pressure is within a range of 3%
of the URV [0 ± 3% x URV].
Example
URV = 250 inH2O
Applied Zero Pressure = ± 0.03x 250 inH2O = ± 7.5 inH2O (compared to factory
settings) values outside this range will be rejected by the transmitter
Trimming with a Field Communicator
1. Connect the Field Communicator, see “Connect the wiring and power up” on
page 6 for instructions.
It is not recommended to zero an absolute transmitter, Rosemount 2051HTA model.

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Quick Start Guide
2. Follow the HART menu to perform the desired zero trim.
Trimming with configuration buttons
A zero trim is to be performed using one of the three possible sets of
configuration buttons located above the terminal block or under the top tag.
To access the configuration buttons on a polished stainless steel housing,
remove the terminal side housing cover.
To access the configuration buttons on an aluminum housing, loosen the screw
on the top tag and slide the tag on the top of the transmitter.
Figure 6. External or Rear/Terminal-Side Configuration Buttons
Analog zero (set 4 mA) Digital zero
Fast Key sequence 3, 4, 2 3, 4, 1, 3
LOI Analog zero and
span Digital zero Aluminum
Polished 316 SST
N/A(1)
1. LOI buttons (option M4) only offer front facing buttons on SST housing (option 1).
Options D4 and DZ can still be purchased for rear/terminal-side facing buttons.
A. Configuration buttons
A
A

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Use the following procedures to perform a zero trim:
Perform trim with LOI (option M4)
1. Set the transmitter pressure.
2. See Figure 5 on page 10 for the operating menu.
a. Perform an analog zero trim by selecting Rerange.
b. Perform a digital zero trim by selecting Zero Trim.
Perform trim with analog zero and span (option D4)
1. Set the transmitter pressure.
2. Press and hold the Zero button for two seconds to perform an analog zero
trim.
Perform trim with digital zero (option DZ)
1. Set the transmitter pressure.
2. Press and hold the Zero button for two seconds to perform a digital zero
trim.

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Quick Start Guide
3.0 Product certifications
3.1 European Directive Information
A copy of the EU Declaration of Conformity can be found at the end of the Quick
Start Guide. The most recent revision of the EU Declaration of Conformity can
be found at Emerson.com/Rosemount.
3.2 Ordinary Location Certification
As standard, the transmitter has been examined and tested to determine that
the design meets the basic electrical, mechanical, and fire protection
requirements by a nationally recognized test laboratory (NRTL) as accredited by
the Federal Occupational Safety and Health Administration (OSHA).
3.3 Installing Equipment in North America
The US National Electrical Code®(NEC) and the Canadian Electrical Code (CEC)
permit the use of Division marked equipment in Zones and Zone marked
equipment in Divisions. The markings must be suitable for the area
classification, gas, and temperature class. This information is clearly defined in
the respective codes.
3.4 Additional Certifications
3-A®
All Rosemount 2051HT transmitters with the following connections are 3-A
approved and labeled
T32: 11/2-in. Tri-Clamp
T42: 2-in. Tri-Clamp
If process connection B11 is selected, please reference the ordering table of the
Rosemount 1199 Diaphragm Seal Product Data Sheet for availability of 3-A
certifications.
A 3-A certificate of compliance is available by selecting option code QA.
EHEDG
All Rosemount 2051HT transmitters with the following connections are EHEDG
approved and labeled:
T32: 11/2-in. Tri-Clamp
T42: 2-in. Tri-Clamp
If process connection B11 is selected, please reference the ordering table of the
Rosemount 1199 Diaphragm Seal Product Data Sheet for availability of EHEDG
certifications.
An EHEDG certificate of compliance is available by selecting option code QE.
Ensure gasket selected for installation is approved to meet both application and
EHEDG certification requirements. Transmitters and all associated accessories
must be installed following EHEDG guidelines to ensure the assembly meets
EHEDG certification requirements.

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March 2018
Figure 7. Declaration of Conformity
EU Declaration of Conformity
No: RMD 1115 Rev. A
Page 1 of 2
We,
Rosemount Inc.
8200 Market Boulevard
Chanhassen, MN 55317-9685
USA
declare under our sole responsibility that the product,
Rosemount™ 2051HT Pressure Transmitters
manufactured by,
Rosemount Inc.
8200 Market Boulevard
Chanhassen, MN 55317-9685
USA
to which this declaration relates, is in conformity with the provisions of the European Union
Directives, including the latest amendments, as shown in the attached schedule.
Assumption of conformity is based on the application of the harmonized standards and, when
applicable or required, a European Union notified body certification, as shown in the attached
schedule.
(signature)
Vice President of Global Quality
(function)
Chris LaPoint
(name)
6-Feb-18; Shakopee, MN USA
(date of issue & place)

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Quick Start Guide
EU Declaration of Conformity
No: RMD 1115 Rev. A
Page 2 of 2
EMC Directive (2014/30/EU)
Rosemount 2051HT Pressure Transmitters
Harmonized Standards: EN 61326-1:2013, EN 61326-2-3:2013
RoHS Directive (2011/65/EU)
Rosemount 2051HT Pressure Transmitters
Harmonized Standard: EN 50581:2012

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Quick Start Guide
00825-0100-4591, Rev BA
March 2018
*00825-0100-4591*