Emerson Rosemount 751 Quick Start Manual

Quick Start Guide

00825-0100-4378, Rev AD

June 2016

Rosemount™ 751 Field Signal Indicator

Quick Start Guide

June 2016

This guide provides basic guidelines for Rosemount 751 Remote Indicator. It does not provide
instructions for configuration, diagnostics, maintenance, service, troubleshooting,
Explosionproof, Flameproof, or intrinsically safe (I.S.) installations. Refer to the Rosemount 751
Reference Manual (document number 00809-0100-4378) for more instruction. This manual is
also available electronically on www.rosemount.com.

Explosions could result in death or serious injury.

Installation of this indicator in an explosive environment must be in accordance with the
appropriate local, national, and international standards, codes, and practices. Review the
approvals section of the Rosemount 751 Reference Manual for any restrictions associated with
a safe installation.

 In an Explosionproof/Flameproof installation, do not remove the indicator cover when power

is applied to the unit.

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.

Contents

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 9

2

Product Certifications . . . . . . . . . . . . . . 11

June 2016

A

B

C

D

E

F

G

H

I

J

K

L

M

N

Quick Start Guide

Installation

Assembly

The Rosemount 751 Field Signal Indicator is comprised of the components shown
in Figure 1. The housing may contain an analog or LCD display meter. Both meters
are independent of component parts and are completely interchangeable. Both
meters plug into the terminal screws on the housing, as shown in Figure 1.

The meter subassembly contains the components shown in Figure 2.

Figure 1. Rosemount 751 Exploded View

A. Terminal screws
B. Housing O-ring
C. Field wiring terminals
D. Loop protection diode
E. Tapped mounting boss
F. Optional mounting bracket
G. Mounting bolt with washer
H. U-bolt for 2-in. pipe

I. Housing
J. Optional ¾ to ½-in. conduit reducing bushing

(if required)
K. Meter
L. Bushing
M. Foam spacer
N. Housing cover

3

Quick Start Guide

A

B

C

D

K

J

I

H

G

F

E

Figure 2. Meter Exploded View

June 2016

A. Retaining straps
B. Mounting screw into housing
C. Washer for retaining strap
D. Mounting screws into mounting plate
E. Terminal screws (2)
F. Mounting plate
G. Spacer plate
H. LCD display
I. Bushing
J. Foam spacer
K. Configuration buttons

4

June 2016

Quick Start Guide

Wiring diagrams

Use the following wiring diagrams to wire the Rosemount 751 Field Signal
Indicator, in series or in parallel, with Rosemount transmitters. Use shielded cable
for best results in electrically noisy environments.

It is recommended that the Rosemount 751 indicator be wired in a series
configuration when the 4-20 mA transmitter does not contain a test terminal. The
Rosemount 751 is designed so the analog or LCD display meter can be removed
from the housing without impacting the integrity of the 4-20 mA loop. Removal
of the entire Rosemount 751 device from the series configuration will disrupt the
loop.

5

Quick Start Guide

A

A

751

4–20 dc Input Signal for

Rosemount 2051

4–20 mA dc Input Signal for

Rosemount 3144P

+

+

–

–

C

B

T

2051

+

–

+

–

3144P

C

B

–

+

T

751

+

–

A

A

4–20 dc Input Signal for

Rosemount 3051S

4–20 mA dc Input Signal for

Rosemount 3051C

+

+

–

–

C

B

T

3051C

751

+

–

+

+

–

–

C

B

T

3051S

751

+

–

Figure 3. Rosemount 751 Series Wiring Diagrams

Rosemount 3144P Temperature Transmitters and Rosemount 2051,

3051C, or 3051S Pressure Transmitters

June 2016

A. Power supply
B. Load resistor
C. Optional ground

6

June 2016

Quick Start Guide

It is recommended that the Rosemount 751 indicator be wired in a parallel
configuration when the 4-20 mA transmitter includes a test terminal. Utilization
of the test terminal is required in a parallel configuration. Connecting the 751
indicator across the positive and negative terminals of the 4-20 mA transmitter
could impact the loop.

A parallel configuration will allow the removal of the 751 indicator without
affecting the integrity of the 4-20 mA loop. Additionally, spare 751 indicators can
be added without disrupting the loop.

7

Quick Start Guide

A

A

751

4–20 dc Input Signal for

Rosemount 2051

4–20 mA dc Input Signal for

Rosemount 3144P

+

+

–

–

C

B

T

2051

+

–

+

–

3144P

C

B

–

+

T

751

+

–

A

A

4–20 dc Input Signal for

Rosemount 3051S

4–20 mA dc Input Signal for

Rosemount 3051C

+

+

–

–

C

B

T

3051C

751

+

–

+

+

–

–

C

B

T

3051S

751

+

–

3051C

4–20 mA dc Input Signal for

Rosemount 3051C

June 2016

Figure 4. Rosemount 751 Parallel Wiring Diagrams

Parallel Wiring Diagrams for Rosemount 3144P Temperature Transmitter

and Rosemount 2051, 3051C or 3051S Pressure Transmitters

A. Power supply
B. Load resistor
C. Optional ground

8

June 2016

Quick Start Guide

Configuration

LCD display configuration

The 20-segment bar graph is factory calibrated and represents 4–20 mA directly,
but the end points of the LCD display are user-definable. The meter requires a
current between 4 and 20 mA in order to be scaled, but the actual value of the
current is not significant.

Remove the cover

Explosions can result in death or serious injury. Do not remove the instrument cover in
explosive environments when the circuit is alive.

1. Unscrew and remove the transparent housing cover from the LCD display
body.

Position the decimal point and select the meter function

1. Press the left and right configuration buttons simultaneously and release them
immediately.

2. To move the decimal point to the desired location, press the left configuration
button.

Note

The decimal point wraps around.

3. To scroll through the mode options, press the right configuration button
repeatedly until the meter displays the desired mode (See Tabl e 1).

Note

The LCD display time-out is approximately 16 seconds. If you do not press the configuration
buttons within 16 seconds, the indicator will revert to reading the current signal.

9

Quick Start Guide

Table 1. LCD Display Mode Options

Options Relationship between input signal and digital display

L in Linear

LinF Linear with five-second filter

Srt Square root

SrtF Square root with five-second filter

Square root function only relates to the digital display. The bar graph output remains
linear with the current signal.

Square root response

The digital display will be proportional to the square root of the input current where 4 mA = 0 and 20 mA =

1.0, scaled per the calibration procedure. The transition point from linear to square root is at 25 percent of
full scale flow.

Filter response operates upon “present input” and “input received in the previous five
second interval” in the following manner:
Display = (0.75 previous input) + (0.25 present input)
This relationship is maintained provided that the previous reading minus the present
reading is less than 25 percent of full scale.

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Store the information

1. Press both configuration buttons simultaneously for two seconds.

Note

The meter displays “- -” for approximately 7.5 seconds while the information is being stored.

Set the display equivalent to a 4 mA signal

1. Press the left configuration button for two seconds.

2. To decrease the display numbers, press the left configuration button. To
increase the numbers, press the right configuration button. Set the numbers
between –999 and 1000.

3. To store the information, simultaneously press both configuration buttons for
two seconds.

Set the display equivalent to a 20 mA signal

1. Press the right configuration button for two seconds.

2. To decrease the display numbers, press the left configuration button. To
increase the numbers, press the right configuration button. Set the numbers
between –999 and 9999.

Note

The sum of the 4 mA point and the span must not exceed 9999.

3. To store the information, simultaneously press both configuration buttons for
two seconds. The LCD display meter is now configured.

Replace the cover

1. Make sure the rubber gasket is seated properly, and thread the transparent
housing cover onto the LCD display meter body.

10

June 2016

Quick Start Guide

Product Certifications

European Directive Information

A copy of the EC Declaration of Conformity can be found at the end of the Quick
Start Guide. The most recent revision of the EC Declaration of Conformity can be
found at www.EmersonProcess.com.

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).

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.

USA

E5 USA Explosion-proof

Certificate: 0T2H8.AE
Standards: FM Class 3600: 1989, FM Class 3615: 1989
Markings: XP CL I, DIV 1, GP B, C, D; DIP CL II/III, DIV 1, GP E, F, G; -40 °C ≤ Ta ≤ +85 °C;

Type 4X

I5 USA Intrinsically Safe; Nonincendive

Certificate: 0T9H2AX
Standards: FM Class 3600: 2011, FM Class 3610: 2010, FM Class 3611: 2004, FM Class

3810: 1989, NEMA-250: 1991, ANSI/ISA 60079-0: 2009, ANSI/ISA 60079-11:
2009

Markings: IS CL I / II / III, DIV 1, GP A, B, C, D, E, F, G; T5; IS CL I, Zone 0, AEx ia IIC T5; NI CL

I, DIV 2, GP A, B, C, D T5; (-60 °C ≤ T
00751-0074; Type 4X

Special Condition for Safe Use (X):

1. The apparatus enclosure contains aluminum and is considered to constitute a

potential risk of ignition by impact or friction. Care must be taken into account during
installation and use to prevent impact or friction.

≤ +60 °C); when installed per

a

11

Quick Start Guide

Canada

E6 Canada Explosionproof

Certificate: 1718395
Standards: CSA Std C22.2 No. 25-1966; CSA Std C22.2 No. 30-M1986; CAN/CSA-C22.2

Markings: Explosionproof for CL I, DIV 1, GP C, D; CL II, DIV 1, GP E, F, G; CL III; DIV 1; CL I

I6 Canada Intrinsically Safe

Certificate: 1718395
Standards: CSA Std C22.2 No. 25-1966; CSA Std C22.2 No. 30-M1986; CAN/CSA-C22.2

Markings: Intrinsically Safe for CL I DIV 1; when installed per 00751-0068; Type 4X

Europe

E8 ATEX Flameproof

Certificate: DEKRA11ATEX0240X
Standards: EN 60079-0:2009, EN 60079-1:2007
Markings: II 2 G Ex d IIC T5/T6 Gb, T6(-20 °C ≤ T

Special Condition for Safe Use (X):

1. The original manufacturer shall be contacted for information on the dimensions of

the flameproof joints.

June 2016

No. 94-M91; CSA Std C22.2 No. 142-M1987

DIV 2, GP A, B, C, D; Type 4X

No. 94-M91; CSA Std C22.2 No. 142-M1987; CAN/CSA-C22.2 No. 157-92;
CSA Std C22.2 No. 213-M1987

≤ +40 °C), T5(-20 °C ≤ Ta ≤ +70 °C)

a

I8 ATEX Intr insic Safety

Certificate: Baseefa03ATEX0448X
Standards: EN 60079-0:2012, EN 60079-11:2012
Markings: II 1 G Ex ia IIC T5/T6 Ga; T6(-60 °C ≤ T

Special Condition for Safe Use (X):

1. The enclosure may be made from aluminum alloy and given a protective

polyurethane or epoxy polyester paint finish; however, care should be taken to
protect it from impact or abrasion if located in a zone 0 environment.

N1 ATE X Type n

Certificate: Baseefa03ATEX0454
Standards: EN 60079-0:2012; EN 60079-15:2010
Markings: II 3 G Ex nA IIC T6 Gc; (-40 °C ≤ T

International

E7 IECEx Flameproof

Certificate: IECEx DEK 11.0082X
Standards: IEC 60079-0:2007-10; IEC 60079-1:2007-04
Markings: Ex d IIC T5/T6 Gb, T6(-20 °C ≤ T

Special Condition for Safe Use (X):

1. The original manufacturer shall be contacted for information on the dimensions of

the flameproof joints.

≤ +40 °C), T5(-60 °C ≤ Ta ≤ +80 °C)

a

≤ +70 °C)

a

≤ +40 °C), T5(-20 °C ≤ Ta ≤ +70 °C)

a

12

June 2016

I7 IECEx Intrinsic Safety

Certificate: IECEx BAS 11.0064X
Standards: IEC 60079-0: 2011; IEC 60079-11: 2011
Markings: Ex ia IIC T5/T6 Ga; T6(-60 °C ≤ T

Special Condition for Safe Use (X):

1. The enclosure may be made of aluminum alloy and given a protective polyurethane or

epoxy polyester paint finish; however, care should be taken to protect it from impact
or abrasion if located in a Zone 0 environment.

Brazil

E2 INMETRO Flameproof

Certificate: NCC 12.1204X
Standards: ABNT NBR IEC 60079-0:2011, ABNT NBR IEC 60079-1:2011
Markings: Ex d IIC T5/T6 Gb; T6(-20 °C ≤ T

Special Condition for Safe Use (X):

1. The manufacturer should be contacted for information on the dimensions of the

flameproof joints.

I2 INMETRO Intrinsic Safety

Certificate: UL-BR 15.1094X
Standards: ABNT NBR IEC 60079-0:2008 + ERRATA 1:2011, ABNT NBR IEC

Markings: Ex ia IIC T5/T6 Ga; T6(-60 °C ≤ T

Special Condition for Safe Use (X):

1. The enclosure may be made of aluminum alloy and given a protective polyurethane or

epoxy polyester paint finish; however, care should be taken to protect it from impact
or abrasion if located in places where EPL Ga is required.

60079-11:2009

Quick Start Guide

≤ +40 °C), T5(-60 °C ≤ Ta ≤ +80 °C)

a

≤ +40 °C), T5(-20 °C ≤ Ta ≤ +70 °C)

a

≤ +40 °C), T5(-60 °C ≤ Ta ≤ +80 °C)

a

China

E3 China Flameproof

Certificate: GYJ12.1034X
Standards: GB 3836.1-2010, GB 3836.2-2010
Markings: Ex d IIC T6 Gb

Special Conditions for Safe Use (X):

1. Symbol “X” is used to denote specific conditions of use: Contact the original

manufacturer when repair work relates to the flamepath.

2. Ambient temperature range is: -20 °C ≤ T

3. The earth connection facility in the enclosure should be connected reliably.

4. During installation, there should be no mixture harmful to flameproof housing.

5. During installation in hazardous location. Cable glands, conduits and blanking plugs,

certified by state-appointed inspection bodies with Ex d IIC Gb degree, should be
used.

6. During installation, use and maintenance in explosive gas atmospheres, observe the

warning “Do not open when energized.”

7. End users is not permitted to change any components insides, but to settle the

problem in conjunction with manufacturer to avoid damage to the product.

8. When installation, use and maintenance of this product, observe following standards:

GB3836.13-1997 “Electrical apparatus for explosive gas atmospheres Part 13: Repair
and overhaul for apparatus used in explosive gas atmospheres.”
GB3836.15-2000 “Electrical apparatus for explosive gas atmospheres Part 15:
Electrical installations in hazardous area (other than mines).”

≤ +60 °C.

a

13

Quick Start Guide

GB3836.16-2006 “Electrical apparatus for explosive gas atmospheres Part 16:
Inspection and maintenance of electrical installation (other than mines).”
GB50257-1996 “Code for construction and acceptance of electric device for
explosion atmospheres and fire hazard electrical equipment installation
engineering.”

EAC - Belarus, Kazakhstan, Russia

EM Technical Regulations Customs Union (EAC) Flameproof

Certificate: RU C-US.GB05.B.00285
Markings:1Ex d IIC T5…T6 X; T5 (-20 °C ≤ T

IM Technical Regulations Customs Union (EAC) Intrinsic Safety

Certificate: RU C-US.GB05.B.00285
Markings:0Ex ia IIC T5…T6 X; T5 (-60 °C ≤ T

NM Technical Regulations Customs Union (EAC) Type n

Certificate: RU C-US.GB05.B.00285
Markings:Ex nA IIC T6 (-40 °C ≤ T

≤ +70 °C);

a

a ≤ +70 °C); T6 (-20 °C ≤ Ta ≤ +40 °C);

a

≤ +80 °C); T6 (-60 °C ≤ Ta ≤ +40 °C);

a

Combinations

K2 Combination of E2 and I2
K5 Combination of E5 and I5
C6 Combination of E6 and I6
KM Combination of EM, IM, and NM

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14

June 2016

Figure 5. Rosemount 751 Declaration of Conformity

Quick Start Guide

15

Quick Start Guide

June 2016

16

Quick Start Guide

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(Cd)

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Polybrominated

biphenyls

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Polybrominated
diphenyl ethers

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Assembly

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Housing

Assembly

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X O O O O

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

China RoHS

Rosemount 751

List of Rosemount 751 Parts with China RoHS Concentration above MCVs

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This table is proposed in accordance with the provision of SJ/T11364.

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O:
O: Indicate that said hazardous substance in all of the homogeneous materials for this part is below the limit requirement of
GB/T 26572.

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X:
X: Indicate that said hazardous substance contained in at least one of the homogeneous materials used for this part is above
the limit requirement of GB/T 26572.

SJ/T11364

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18

June 2016

Quick Start Guide

19

Rosemount World Headquarters

Emerson Process Management

6021 Innovation Blvd
Shakopee, MN 55379, USA

[phone] or [phone]
[phone]
[email protected]

North America Regional Office

Emerson Process Management

8200 Market Blvd.
Chanhassen, MN 55317, USA

[phone] or [phone]
[phone]
[email protected]

Latin America Regional Office

Emerson Process Management

1300 Concord Terrace, Suite 400
Sunrise, Florida, 33323, USA

[phone]
[phone]
[email protected]

00825-0100-4378

Quick Start Guide

00825-0100-4378, Rev. AD

June 2016

Europe Regional Office

Emerson Process Management Europe GmbH

Neuhofstrasse 19a P.O. Box 1046
CH 6340 Baar
Switzerland

[phone]
[phone]
[email protected]

Asia Pacific Regional Office

Emerson Process Management Asia Pacific Pte Ltd

1 Pandan Crescent
Singapore 128461

[phone]
[phone]

[email protected]

Middle East and Africa Regional Office

Emerson Process Management

Emerson FZE P.O. Box 17033,
Jebel Ali Free Zone - South 2
Dubai, United Arab Emirates

[phone]
[phone]

[email protected]

Standard Terms and Conditions of Sale can be found at:

www.Emerson.com/en-us/pages/Terms-of-Use.aspx

The Emerson logo is a trademark and service mark of Emerson Electric Co.
Rosemount and Rosemount logotype are trademarks of Emerson Process
Management.
National Electrical Code is a registered trademark of National Fire
Protection Association, Inc.
All other marks are the property of their respective owners.
© 2016 Emerson Process Management. All rights reserved.