Quick Start Guide
00825-0100-4378, Rev CB
September 2020
Rosemount™ 751 Field Signal Indicator
Quick Start Guide September 2020
About this guide
This guide provides basic guidelines for Rosemount 751 Field Signal 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 for
more instruction. This manual is also available electronically on Emerson.com/Rosemount.
WARNING
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 Product
Certifications section for any restrictions associated with a safe installation.
• In an explosion-proof/flameproof installation, do not remove the indicator cover when power is
applied to the unit.
Electrical shock could cause death or serious injury.
• Avoid contact with the leads and terminals. High voltage that may be present on leads can cause
electrical shock.
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 to protecting your
system. Restrict physical access by unauthorized personnel to protect end users’ assets. This is
true for all systems used within the facility.
Contents
Installation................................................................................................................................... 3
Configuration...............................................................................................................................8
Product Certification.................................................................................................................. 11
Declaration of Conformity..........................................................................................................17
China RoHS................................................................................................................................ 20
2 Rosemount 751
September 2020 Quick Start Guide
1 Installation
1.1 Assembly
The Rosemount 751 Field Signal Indicator is comprised of the components
shown in Figure 1-1. The housing may contain an analog or liquid crytal
display (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 1-1.
The meter subassembly contains the components shown in Figure 1-2.
Quick Start Guide 3
A
B
C
D
E
F
G
H
I
J
K
L
M
N
Quick Start Guide September 2020
Figure 1-1: 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
4 Rosemount 751
A
B
C
D
K
J
I
H
G
F
E
September 2020 Quick Start Guide
Figure 1-2: Meter Exploded View
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
Quick Start Guide 5
+
−
A B
C
3144P
+
−
751
+
−
A B
C
2051
+−T
751
+
−
+
−
A B
C
751
+
−
3051C
+−T
+
−
A
B
C
751
+
−
3051S +
−
T
Quick Start Guide September 2020
1.2 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 indicator 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 device from the series configuration will
disrupt the loop.
Figure 1-3: Rosemount 751 Series Wiring Diagrams
4–20 mA dc Input Signal for Rosemount
3144P
4–20 mA dc Input Signal for Rosemount
6 Rosemount 751
A. Power supply
B. Load resistor
C. Optional ground
3051C
4–20 dc Input Signal for Rosemount
2051
4–20 dc Input Signal for Rosemount
3051S
A
+
B
C
-
+
T
3144P
-
+
751
A
+
B
C
+
-
T
2051
751
- +
A
+
B
C
+-T
3051C
751
-
+
+
-
A
B
C
+
-
T 3051S
- +
751
September 2020 Quick Start Guide
It is recommended that the device 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 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 indicator without
affecting the integrity of the 4-20 mA loop. Additionally, spare indicators can
be added without disrupting the loop.
Figure 1-4: Rosemount 751 Parallel Wiring Diagrams
4–20 mA dc Input Signal for Rosemount
3144P
4–20 mA dc Input Signal for Rosemount
3051C
4–20 dc Input Signal for Rosemount
2051
4–20 dc Input Signal for Rosemount
3051S
A. Power supply
B. Load resistor
Quick Start Guide 7
C. Optional ground
Quick Start Guide September 2020
2 Configuration
2.1 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.
2.1.1 Remove the cover
WARNING
Explosions could result in death or serious injury. Do not remove the
transmitter cover in explosive atmospheres when the circuit is live.
Procedure
Unscrew and remove the transparent housing cover from the LCD display
body.
2.1.2 Position the decimal point and select the meter function
Procedure
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
Table 2-1).
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.
Table 2-1: LCD Display Mode Options
Options Relationship between Input Signal
L in Linear
LinF Linear with 5-second filter
8 Rosemount 751
and Digital Display
September 2020 Quick Start Guide
Table 2-1: LCD Display Mode Options (continued)
Options Relationship between Input Signal
Srt Square root
SrtF Square root with 5-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.
2.1.3 Store the information
Procedure
Press both configuration buttons simultaneously for two seconds.
Note
The meter displays “- -” for approximately 7.5 seconds while the information
is being stored.
and Digital Display
2.1.4 Set the display equivalent to a 4 mA signal
Procedure
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.
2.1.5 Set the display equivalent to a 20 mA signal
Procedure
1. Press the right configuration button for two seconds.
Quick Start Guide 9
Quick Start Guide September 2020
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.
2.1.6 Replace the cover
Procedure
Make sure the rubber gasket is seated properly, and thread the transparent
housing cover onto the LCD display meter body.
10 Rosemount 751
September 2020 Quick Start Guide
3 Product Certification
Rev 1.10
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 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 USA
3.4.1 E5 USA Explosion-proof
Certificate
Standards
Markings
3.4.2 I5 USA Intrinsically Safe; Nonincendive
Certificate
Standards
Markings
Quick Start Guide 11
0T2H8.AE
FM Class 3600: 1989, FM Class 3615: 1989
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
0T9H2AX
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
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 a ≤ +60 °C);
when installed per 00751-0074; Type 4X
Quick Start Guide September 2020
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.
3.5 Canada
3.5.1 E6 Canada Explosionproof
Certificate
Standards
Markings
1718395
CSA Std C22.2 No. 25-1966; CSA Std C22.2 No. 30-M1986;
CAN/CSA-C22.2 No. 94-M91; CSA Std C22.2 No. 142-M1987
Explosionproof for CL I, DIV 1, GP C, D; CL II, DIV 1, GP E, F, G;
CL III; DIV 1; CL I DIV 2, GP A, B, C, D; Type 4X
3.5.2 I6 Canada Intrinsically Safe
Certificate
Standards
Markings
1718395
CSA Std C22.2 No. 25-1966; CSA Std C22.2 No. 30-M1986;
CAN/CSA-C22.2 No. 94-M91; CSA Std C22.2 No. 142-M1987;
CAN/CSA-C22.2 No. 157-92; CSA Std C22.2 No. 213-M1987
Intrinsically Safe for CL I DIV 1; when installed per
00751-0068; Type 4X
3.6 Europe
3.6.1 E8 ATEX Flameproof
Certificate
Standards
Markings
Installation Instructions
1. Only use plugs, adapters, glands, or conduit with a compatible
DEMKO 18 ATEX 1958X
EN 60079-0:2012+A11:2013; EN 60079-1:2014
II 2 G Ex db IIC T5/T6 Gb, T6(–40 °C ≤ Ta ≤ +40 °C), T5(–40
°C ≤ Ta ≤ +70 °C) V
thread form when closing conduit entries.
= 60 Vdc; I
max
= 50 mA; P
max
max
=1.5 W
2. The 751 may be provided with a ¾NPT to ½NPT thread adapter. This
thread adapter has not been assessed under DEMKO 18 ATEX 1958X.
When installing this thread adapter, refer to manufacturer’s
installation instructions.
12 Rosemount 751
September 2020 Quick Start Guide
Special Conditions for Safe Use (X):
1. Flameproof joints are not intended for repair.
2. Painted enclosures may cause risk from electrostatic discharge.
Avoid installation that could cause electrostatic build-up on painted
surfaces, and only clean the painted surfaces with a damp cloth.
3.6.2 I8 ATEX Intrinsic Safety
Certificate
Standards
Markings
Baseefa03ATEX0448X
EN 60079-0:2012, EN 60079-11:2012
II 1 G Ex ia IIC T5/T6 Ga; T6(–60 °C ≤ Ta ≤ +40 °C), T5(–60 °C
≤ Ta ≤ +80 °C)
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.
3.6.3 N1 ATEX Type n
Certificate
Standards
Markings
Baseefa03ATEX0454
EN 60079-0:2012; EN 60079-15:2010
II 3 G Ex nA IIC T6 Gc; (–40 °C ≤ Ta ≤ +70 °C)
3.7 International
3.7.1 E7 IECEx Flameproof
Certificate
Standards
Markings
IECEx UL 18.0040X
IEC 60079-0:2011; IEC 60079-1:2014-06
Ex db IIC T5/T6 Gb, T6(–40 °C ≤ Ta ≤ +40 °C), T5(–40°C ≤ Ta ≤
+70 °C) V
= 60 Vdc; I
max
= 50 mA; P
max
max
=1.5 W
Installation Instructions
1. Only use plugs, adapters, glands, or conduit with a compatible
thread form when closing conduit entries.
2. The 751 may be provided with a ¾NPT to ½NPT thread adapter. This
thread adapter has not been assessed under IECEx UL 18.0040X.
When installing this thread adapter, refer to manufacturer’s
installation instructions.
Quick Start Guide 13
Quick Start Guide September 2020
Special Conditions for Safe Use (X):
1. Flameproof joints are not intended for repair.
2. Painted enclosures may cause risk from electrostatic discharge.
Avoid installations that could cause electrostatic build-up on painted
surfaces, and only clean the painted surfaces with a damp cloth.
3.7.2 I7 IECEx Intrinsic Safety
Certificate
Standards
Markings
Special Condition for Safe Use (X):
1. The enclosure may be made of aluminum alloy and given a protective
IECEx BAS 11.0064X
IEC 60079-0: 2011; IEC 60079-11: 2011
Ex ia IIC T5/T6 Ga; T6(–60 °C ≤ Ta ≤ +40 °C), T5(–60 °C ≤ Ta ≤
+80 °C)
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.
3.8 Brazil
3.8.1 E2 INMETRO Flameproof
Certificate
Standards
Markings
Special Condition for Safe Use (X):
1. Flameproof joints are not intended for repair.
2. Optional paint may cause risk from electrostatic discharge. Avoid
UL-BR 16.0054X
ABNT NBR IEC 60079-0:2008 + Errata 1:2011, ABNT NBR IEC
60079-1:2009 + Errata 1:2011
Ex db IIC T5/T6 Gb; T6(–40 °C ≤ Ta ≤ +40 °C), T5(–40 °C ≤ Ta ≤
+70 °C)
installations that could cause electrostatic build-up on painted
surfaces, and only clean the painted surfaces with a damp cloth. If
paint is ordered through a special option code, contact the
manufacturer for more information.
3.8.2 I2 INMETRO Intrinsic Safety
Certificate
Standards
14 Rosemount 751
UL-BR 15.1094X
ABNT NBR IEC 60079-0:2008 + ERRATA 1:2011, ABNT NBR IEC
60079-11:2009
September 2020 Quick Start Guide
Markings
Special Condition for Safe Use (X):
1. The enclosure may be made of aluminum alloy and given a protective
Ex ia IIC T5/T6 Ga; T6(–60 °C ≤ Ta ≤ +40 °C), T5(–60 °C ≤ Ta ≤
+80 °C)
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.
3.9 EAC - Belarus, Kazakhstan, Russia
3.9.1 EM Technical Regulation Customs Union TR CU 012/2011 (EAC) Flameproof
Markings
1Ex db IIC T6…T5 Gb X; T5 (-40 °C ≤ Ta ≤ +70 °C); T6 (-40 °C ≤ T
≤ +40 °C);
See certificate for Special Conditions for Safe Use.
3.9.2 IM Technical Regulation Customs Union TR CU 012/2011 (EAC) Intrinsic Safety
Markings
0Ex ia IIC T6…T5 Ga X; T5 (-60 °C ≤ Ta ≤ +80 °C); T6 (-60 °C ≤ Ta ≤
+40 °C);
See certificate for Special Conditions for Safe Use.
3.10 China
3.10.1 E3 China Flameproof
a
Certificate
Standards
Markings
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: T6(-20 °C ≤ Ta ≤ +40 °C), T5(-20 °C ≤
Ta ≤ +70 °C).
3. The earth connection facility in the enclosure should be connected
reliably.
4. During installation, there should be no mixture harmful to
flameproof housing.
Quick Start Guide 15
GYJ17.1007X (CCC 认证)
GB 3836.1-2010, GB 3836.2-2010
Ex d IIC T5/T6 Gb
Quick Start Guide September 2020
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: GB3836.13-2013 “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)” GB3836.16-2006
“Electrical apparatus for explosive gas atmospheres Part 16:
Inspection and maintenance of electrical installation (other than
mines)” GB50257-2014 “Code for construction and acceptance of
electric device for explosion atmospheres and fire hazard electrical
equipment installation engineering”.
3.10.2 I3 China Intrinsic Safety (Special Y0052)
Certificate:
Standards:
Markings:
Special Condition for Safe Use (X):
1. See certificate for special conditions of safe use.
3.11
16 Rosemount 751
Combinations
K2
K5
C6
KM
GYJ19.1331X (CCC 认证)
GB 3836.1-2010, GB 3836.4-2010, GB 3836.20-2010
Ex ia IIC T5/T6 Ga; T5(-60 °C ~ +80 °C), T6(-60 °C ~ +40 °C)
Combination of E2 and I2
Combination of E5 and I5
Combination of E6 and I6
Combination of EM and IM
September 2020 Quick Start Guide
4 Declaration of Conformity
Quick Start Guide 17
Quick Start Guide September 2020
18 Rosemount 751
September 2020 Quick Start Guide
Quick Start Guide 19
ᴹ
China RoHS
㇑᧗⢙䍘䎵䗷ᴰབྷ⎃ᓖ䲀٬Ⲵ䜘Ԧරࡇ㺘
Rosemount 751
List of Rosemount 751 Parts with China RoHS Concentration above MCVs
䜘Ԧ〠
Part Name
ᴹᇣ⢙䍘Hazardous Substances
䫵
Lead
(Pb)
⊎
Mercury
(Hg)
䭹
Cadmium
(Cd)
ޝԧ䬜
Hexavalent
Chromium
(Cr +6)
ཊⓤ㚄㤟
Polybrominated
biphenyls
(PBB)
ཊⓤ㚄㤟䟊
Polybrominated
diphenyl ethers
(PBDE)
⭥ᆀ㓴Ԧ
Electronics
Assembly
X O O O O
O
༣փ㓴Ԧ
Housing
Assembly
O O O X O
O
Րᝏಘ㓴Ԧ
Sensor
Assembly
X O O O O
O
ᵜ㺘Ṭ㌫ᦞ
SJ/T11364
Ⲵ㿴ᇊ㘼ࡦ
This table is proposed in accordance with the provision of SJ/T11364.
O:
Ѫ䈕䜘ԦⲴᡰᴹ൷䍘ᶀᯉѝ䈕ᴹᇣ⢙䍘Ⲵ䟿൷վҾ
GB/T 26572
ᡰ㿴ᇊⲴ䲀䟿㾱≲
O: Indicate that said hazardous substance in all of the homogeneous materials for this part is below the limit requirement of
GB/T 26572.
X:
Ѫ൘䈕䜘Ԧᡰ֯⭘Ⲵᡰᴹ൷䍘ᶀᯉ䟼ˈ㠣ቁᴹа㊫൷䍘ᶀᯉѝ䈕ᴹᇣ⢙䍘Ⲵ䟿儈Ҿ
GB/T 26572
ᡰ㿴ᇊⲴ䲀䟿㾱≲
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.
Quick Start Guide September 2020
5 China RoHS
20 Rosemount 751
September 2020 Quick Start Guide
Quick Start Guide 21
Quick Start Guide September 2020
22 Rosemount 751
September 2020 Quick Start Guide
Quick Start Guide 23
*00825-0100-4378*
00825-0100-4378, Rev. CB
Quick Start Guide
September 2020
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