Emerson Rosemount 3814 User manual

Installation manual
00825-0100-3814, Rev AB
January 2023
Rosemount™ 3814 Liquid Ultrasonic Flow
Meter

Safety and approval information
This Rosemount product complies with all applicable European directives when properly installed in accordance with
the instructions in this manual. Refer to the EU declaration of conformity for directives that apply to this product. The
EU declaration of conformity, with all applicable European directives, and the complete ATEX Installation Drawings
and Instructions are available on the internet at www.emerson.com or through your local Emerson support center.
Information affixed to equipment that complies with the Pressure Equipment Directive, can be found on the internet
at www.emerson.com.
For hazardous installations in Europe, refer to standard EN 60079-14 if national standards do not apply.
Other information
Full product specifications can be found in the product data sheet. Troubleshooting information can be found in the
user manual. Product data sheets and manuals are available from the Emerson website at www.emerson.com.
Return policy
Follow Emerson procedures when returning equipment. These procedures ensure legal compliance with government
transportation agencies and help provide a safe working environment for Emerson employees. Emerson will not
accept your returned equipment if you fail to follow Emerson procedures. Return procedures and forms are available
on our web support site at www.emerson.com, or by phoning the Emerson Customer Service department.
Emerson Flow customer service
Email:
•Worldwide: [email protected]
•Asia-Pacific: [email protected]
Telephone:
North and South America Europe and Middle East Asia Pacific
United States 800 522 6277 U.K. 0870 240 1978 Australia 800 158 727
Canada [phone] The
Netherlands
[phone] New Zealand 099 128 804
Mexico [phone] France 0800 917 901 India 800 440 1468
Argentina [phone] Germany 0800 182 5347 Pakistan 888 550 2682
Brazil [phone] Italy 8008 77334 China [phone]
Central &
Eastern
[phone] Japan [phone]
Russia/CIS [phone] South Korea [phone]
Egypt 0800 000 0015 Singapore [phone]
Oman 800 70101 Thailand 001 800 441 6426
Qatar 431 0044 Malaysia 800 814 008
Kuwait 663 299 01
South Africa 800 991 390
Saudi Arabia 800 844 9564
UAE 800 0444 0684
2

Contents
Chapter 1 Introduction............................................................................................................... 5
1.1 General overview of Rosemount Liquid Ultrasonic Flow Meter............................................ 5
1.2 Typical applications..................................................................................................................... 5
1.3 Features and benefits of this product.......................................................................................6
1.4 Acronyms, abbreviations and definitions.................................................................................6
1.5 MeterLink software..................................................................................................................... 9
1.6 Rosemount 3814 Liquid Ultrasonic Flow meter design........................................................10
1.7 Meter specifications..................................................................................................................12
1.8 Pre-installation considerations................................................................................................19
1.9 Safety conditions....................................................................................................................... 20
1.10 Certifications and approvals.................................................................................................. 20
1.11 FCC compliance....................................................................................................................... 21
1.12 References................................................................................................................................22
Chapter 2 Mechanical Installation...........................................................................................23
2.1 Meter piping, lifting and mounting.........................................................................................23
2.2 Meter components....................................................................................................................24
2.3 Piping recommendations......................................................................................................... 28
2.4 Meter safety for hoist rings and lifting slings........................................................................31
2.5 Mounting requirements in heated or cooled pipelines........................................................40
Chapter 3 Electrical Installation.............................................................................................. 43
3.1 Cable length TTL mode.............................................................................................................43
3.2 Cable length Open Collector mode.........................................................................................43
3.3 Grounding meter electronics...................................................................................................44
3.4 Conduit seals..............................................................................................................................45
3.5 Wiring and I/O........................................................................................................................... 47
3.6 Rosemount Ultrasonic Meters I/O connections.................................................................... 53
3.7 Security seal installation...........................................................................................................58
3.8 Sealing the unit..........................................................................................................................62
Chapter 4 Configuration........................................................................................................... 63
4.1 Set up MeterLink....................................................................................................................... 63
4.2 Using AMS Device Manager to configure the meter............................................................ 68
4.3 Using a Field Communicator to configure the meter...........................................................83
4.4 Security seals for the meter..................................................................................................... 85
4.5 Configure users and network security................................................................................... 85
Appendix A Engineering Drawings............................................................................................. 87
A.1 Rosemount 3814 Liquid Ultrasonic Flow Meter drawings................................................... 87
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Appendix B Open Sources licenses ............................................................................................ 91
B.1 List of Open Source licenses....................................................................................................91
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1 Introduction
1.1 General overview of Rosemount Liquid
Ultrasonic Flow Meter
Rosemount 3814 Liquid Ultrasonic Meters have various configurations that meet
a broad range of customer requirements. Each meter comes fully assembled from
Emerson, and all parts and assemblies are tested prior to shipment.
Refer to the following documents for additional details:
•00825-0300-3810 HART® Field Device Specification Guide Liquid Ultrasonic
Meter
•00809-0100-3814 Rosemount 3810 Liquid Ultrasonic Meter Maintenance and
Troubleshooting Manual
Computer simulations of various velocity profiles demonstrate that four
measurement paths provide an optimum solution for measuring asymmetric
flow. The Rosemount 3814 Liquid Ultrasonic Meter utilizes four cross-bore,
parallel-plane measurement paths to offer a high degree of accuracy,
repeatability, and superior low-flow capabilities without the compromises
associated with conventional technologies. These features make the Rosemount
3814 Liquid Ultrasonic Meter the best choice for custody transfer applications.
The Rosemount 3814 Liquid Ultrasonic Meter technology can be applied to
custody transfer flow measurement applications as shown in the following
section.
1.2 Typical applications
•Custody transfer measurement
•Allocation measurement
•High viscosity, low Reynolds Number applications (where Re ≤5000)
•Check metering
•Leak detection
•Line balancing
•Batch control
•Loading and off loading
•Offshore
—FPSO (Floating Production, Storage and Offshore Loading)
—Offshore Platforms
—Barges
•Pipelines
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Rosemount 3814 Liquid Ultrasonic Flow Meter 5

—Crude Oil pipelines
—Refined product pipelines
•Terminals
—Loading and off-loading (Ship, barge, truck, railcar, etc.)
—Tank Farms
—Cavern Storage
1.3 Features and benefits of this product
•Explosion-proof transmitter electronics enclosure with CPU Module, Power
Supply, Intrinsic Safety Barrier Module and Backplane board
•Intrinsically safe Transducer electronics enclosure with the Acquisition Module
•HART® and AMS Suite: Intelligent Device Manager communications for
PlantWeb architecture
•Reduce unaccounted measurement
•Increase energy savings
•Replaceable transducers while under pressure
•Extensive self diagnostics
•Immediate alarm reporting
•Auto-detected ASCII/RTU Modbus communications protocol
•Interchangeable electronics modules
•Internet-ready communications
•Ethernet access
•Modbus TCP/IP
•On-board LED status indicators
•Analog pressure and temperature inputs
•MeterLink (a Windows™-based interface software)
•Local Display (optional)
•Glass endcap (for local display installations)
For other features and benefits refer to the product datasheet at:
www.emerson.com/en-us/automation/rosemount.
1.4 Acronyms, abbreviations and definitions
Table 1-1: Acronyms, abbreviations and definitions
Acronym or abbreviation Definition
° degree (angle)
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Table 1-1: Acronyms, abbreviations and definitions (continued)
Acronym or abbreviation Definition
°C degrees celsius (temperature unit)
°F degrees fahrenheit (temperature unit)
ADC analog-to-digital converter
AI analog input
AMS® Suite Device Manager Asset Management Software - Device
Manager
AO analog output
ASCII MODBUS A Modbus protocol message framing
format in which ASCII characters are used
to delineate the beginning and end of the
frame. ASCII stands for American Standard
Code for Information Interchange.
boolean A type of data point that can only take on
values of TRUE or FALSE (generally TRUE is
represented by a value of 1, FALSE is
represented by a value of 0)
bps Bits per second (baud rate)
cPoise Centipoise (viscosity unit)
CPU Central Processing Unit
CTS Clear-to-Send; the RS-232C handshaking
signal input to a transmitter indicating that
it is okay to transmit data – i.e., the
corresponding receiver is ready to receive
data. Generally, the Request-to-Send (RTS)
output from a receiver is input to the Clear-
to-Send (CTS) input of a transmitter.
DAC Digital-to-Analog Converter
MeterLink™Ultrasonic Meter interface software
DI Digital Input
DO Digital Output
DHCP Dynamic Host Configuration Protocol
dm decimeter (10-1 meters, length unit)
ECC Error Correction Code
EEPROM Electrically-Erasable, Programmable Read-
Only Memory
Flash non-volatile, programmable read-only
memory
FODO Output that is user configurable as either a
frequency or digital output
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Table 1-1: Acronyms, abbreviations and definitions (continued)
Acronym or abbreviation Definition
HART® Communication Protocol Highway Addressable Remote Transducer
communications protocol
hr hour (time unit)
Hz Hertz (cycles per second, frequency unit)
I/O Input/Output
IS Intrinsically Safe
K Kelvin (temperature unit)
kHz Kilohertz (103 cycles per second, frequency
unit)
LAN Local Area Network
LED Light-emitting Diode
m meter (length unit)
m3/d cubic meters per day (volumetric flow rate)
m3/h cubic meters per hour (volumetric flow rate)
m3/s cubic meters per second (volumetric flow
rate)
mA milliamp (current unit)
MAC Address Media Access Control (Ethernet Hardware
Address -EHA)
microinch (μinch) microinch (10-6 in)
micron micrometer (10-6 m)
MMU Memory Management Unit
MPa Megapascal (equivalent to 106 Pascal)
(pressure unit)
N/A Not Applicable
Nm3/h normal cubic meters per hour
NOVRAM Non-volatile Random Access Memory
Pa Pascal, equivalent to 1 newton per square
meter (pressure unit)
Pa⋅s Pascal Second (viscosity unit)
PC Personal Computer
PFC Peripheral field connection (board)
P/N part number
PS power supply (board)
psi pounds per square inch (pressure unit)
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Table 1-1: Acronyms, abbreviations and definitions (continued)
Acronym or abbreviation Definition
psia pounds per square inch absolute (pressure
unit)
psig pounds per square inch gage (pressure
unit)
R Radius
rad radian (angle)
RAM Random Access Memory
RTS Request-to-Send; the RS-232C handshaking
signal output by a receiver when it is ready
to receive data
RTU MODBUS A Modbus protocol framing format in which
elapsed time between received characters
is used to separate messages. RTU stands
for Remote Terminal Unit.
s second (time unit, metric)
SDRAM Synchronous Dynamic Random Access
Memory
sec second (time unit, U.S. customary)
TCP/IP Transmission Control Protocol/Internet
Protocol
time_t seconds since Epoch (00:00:00 UTC Jan. 1,
1970) (time unit)
UDP User Datagram Protocol
U.L. Underwriters Laboratories, Inc. - product
safety testing and certification organization
V Volts (electric potential unit)
W Watts (power unit)
1.5 MeterLink software
MeterLink software has robust features for setting communications parameters,
calibrating your meter, collecting logs and reports and monitoring the meter
health and alarm statuses. MeterLink may be downloaded at no charge from:
www.emerson.com/meterlink
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Rosemount 3814 Liquid Ultrasonic Flow Meter 9

Figure 1-1: MeterLink download and registration
Select the MeterLink software and firmware bundle appropriate for your meter.
Complete the Online registration form and you will receive a confirmation email
with a hyperlink directing you to the download site.
NOTICE
After the download, follow the instructions in the Readme file. Do not attempt to
unzip the zipped firmware file. MeterLink unzips the compressed file using the
Tools → Program Download utility.
Refer to the MeterLink Software for Gas and Liquid Ultrasonic Meters Quick Start
Manual (00809-0100-7630) for installation instructions and to setup initial
communications. You may download the manual from the MeterLink web page:
www.emerson.com/meterlink
1.6 Rosemount 3814 Liquid Ultrasonic Flow
meter design
The Rosemount 3814 Liquid Ultrasonic Flow Meter is a four-path (eight
transducers) in-line meter designed to measure the difference in signal transit
time with and against the flow across one or more measurement path(s). A signal
transmitted in the flow direction travels faster than one transmitted against the
flow direction. Each measurement path is defined by a transducer pair in which
each transducer alternately acts as transmitter and receiver. The meter uses
transit time measurements and transducer location information to calculate the
mean velocity. Computer simulations of various velocity profiles demonstrate that
multiple measurement paths provide an optimum solution for measuring
asymmetric flow. The Rosemount 3814 Liquid Ultrasonic Flow Meter utilizes four
cross-bore, parallel-plane measurement paths, offers a high degree of
repeatability, bi-directional measurement and superior low-flow capabilities
without the compromises associated with conventional technologies.
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Figure 1-2: Rosemount 3814 Liquid Ultrasonic Flow Meter Design
A. Transmitter electronics enclosure (explosion-proof) Optional - Local Display
with glass endcap (Figure 1-3)
B. Base electronics enclosure (intrinsically safe)
C. Meter body with transducer assemblies (LT-031, LT-03, LT-04, LT-05, LT-08, or
LT-09) (intrinsically safe)
Figure 1-3: Transmitter electronics enclosure with optional local display and
glass endcap
The Rosemount 3814 Liquid Ultrasonic Flow Meter is a four-path (eight
transducers) in-line meter designed to measure the difference in signal transit
time with and against the flow across one or more measurement path(s). A signal
transmitted in the flow direction travels faster than one transmitted against the
flow direction. Each measurement path is defined by a transducer pair in which
each transducer alternately acts as transmitter and receiver. The meter uses
transit time measurements and transducer location information to calculate the
mean velocity.
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Rosemount 3814 Liquid Ultrasonic Flow Meter 11

Computer simulations of various velocity profiles demonstrate that multiple
measurement paths provide an optimum solution for measuring asymmetric
flow. The Rosemount 3814 Liquid Ultrasonic Flow Meter utilizes four cross-bore,
parallel-plane measurement paths, offers a high degree of repeatability, bi-
directional measurement and superior flow capabilities for custody transfer
without the compromises associated with conventional technologies.
The Rosemount 3814 Liquid Ultrasonic Flow Meter’s U.L. safety listing is
accomplished through the combination of an explosion-proof Transmitter
Electronics Enclosure that houses the CPU Module, Power Supply board, I.S.
Barrier board, Backplane board and optional LCD Display board.
Important
The optional LCD Display requires firmware v1.04 or later and Uboot version,
January 31, 2013.
The Base Electronics Enclosure is intrinsically safe and houses the Acquisition
Module, the acquisition cable and wiring. The Intrinsically safe transducers and
cable assemblies are designed for Class 1, Division 1, Groups C and D areas
without need of further protection when installed in accordance with the field
wiring diagram (refer to Rosemount drawing DMC-004936, the Rosemount 3814
Liquid Ultrasonic Flow Meter’s U.L. safety listing is accomplished through the
combination of an explosion-proof Transmitter Electronics Enclosure that houses
the CPU Module, the Base Electronics Enclosure that houses the Acquisition
Module with intrinsically safe transducers and cable assemblies designed for
Class 1, Division 1, Groups C and D areas without need of further protection when
installed in accordance with the field wiring diagram (refer to Rosemount drawing
DMC-004936, see Engineering Drawings) and Safety conditions.
1.7 Meter specifications
CAUTION
FLUID CONTENTS MAY BE HAZARDOUS
The meter must be fully depressurized and drained before attempting to remove
the transducer housing. If fluid begins to leak from the transducer housing,
immediately reinstall it.
Failure to comply may cause serious injury or equipment damage.
CAUTION
ESCAPING FLUIDS HAZARD
The purchaser of the meter is responsible for the selection of Rosemount
components/seals and materials compatible with the chemical properties of the
measurement fluid.
Failure to select suitable meter components/seals may cause escaping fluids,
resulting in injury or equipment damage.
Consult your Emerson Flow service representative to ensure you purchase the
correct components and seals for your application.
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Specifications for Rosemount 3814 Liquid Ultrasonic Flow Meters are below:
Table 1-2: Meter specifications
Liquid Meter specifications
Meter type Number of paths:
•Four path (eight transducer) chordal
design
Ultrasonic type •Transit-time based measurement
•Spool piece with integral mount
transducers
Enclosure materials •ASTM B26 Gr A356.0 T6 Aluminum
—Chromate conversion coated with a
polyurethane enamel
•ASTM A351 Gr CF8M Stainless Steel
—Passivated
Meter Performance
Linearity •± 0.15% of measured value over a 10:1
turndown
•± 0.20% of measured value over a 20:1
turndown
Uncertainty of Meter Factor < ± 0.027% (API MPMS, Chapter 5, Section 8,
Table B-1)
Velocity range •2.0 fps (0.6 m/s) to 40.0 fps (12.2 m/s)
(nominal) 48 fps (14.3 m/s) (over-range)
Upper Viscosity Limit •150 centipoise (Transducers LT-01,
LT-03, LT-08, LT-09)
•1000 centipoise (Transducers LT-04,
LT-05)
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Table 1-2: Meter specifications (continued)
Liquid Meter specifications
Body and Flange Pressure rating range U.S. Customary Units - Meter sizes 4 inches
to 24 inches (Raised face, RTJ or
Companion)
•Line sizes:
—4” inches (DN 100)
—6” inches (DN 150)
—8” inches (DN 200)
—10” inches (DN 250)
—12” inches (DN 300)
—16” inches (DN 400)
—18” inches (DN 450)
—20” inches (DN 500)
—24” inches (DN 600)
•ANSI pressure classes (per ANSI B16.5):
—150 ANSI / PN 20
—300 ANSI / PN 50
—600 ANSI / PN 100
—900 ANSI / PN 150
—1500 ANSI/PN 200
•Body and flange material and
temperature ratings:
—Carbon Steel body and Flanges: (-45
°C to 150 °C)
—316 Stainless steel body and flanges:
(-50 °C to 150 °C)
—316L Stainless steel body and
flanges: (-50 °C to 150 °C)
—Carbon Steel body and flanges: (-50
°C to 150 °C)
•Maximum Pressures
—Dependent on operating
temperature
•Minimum Pressures
—0 psig 0 barg
Meter bore
•Schedule 20, 30, 40, 80, 120, 160, LW, XS,
XXS and Standard
Flange types •Raised face or RTJ
Specific Gravity •0.35 to 1.50
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Table 1-2: Meter specifications (continued)
Liquid Meter specifications
Accuracy Limits •Accuracy limits typically are:
—±0.20% without a flow calibration
Power Meter
•10.4 VDC to 36 VDC
•11 W typical power consumption
Temperature flameproof Transmitter
Electronic Enclosure and Base Electronics
Enclosure
Serial cable
•Belden #9940 or equivalent (22 gauge)
—Capacitance (pF/m) 121.397
(conductor to conductor)
—Capacitance (pF/m) 219.827
(conductor to other conductor and
shield)
—Resistance (DC) DCR @ 20 °C
(Ohm/km) 48.2307 Nominal Outer
shield resistance - DCR @ 20 °C
(Ohm/km) 16.405
—Operating voltage - 300 V RMS (UL
AWM Style 2464)
—Current 2.4 Amps per conductor @
25 °C (recommended)
Ethernet cable
•Cat-5 Standard 100Mbps
Frequency (see Table 3-1)
•22 AWG wire characteristics are as
follows:
—Capacitance = 20 pF/ft or 20 nF/1000
ft (between two wires)
—Resistance = 0.0168 Ohms/ft or 16.8
Ohms/1000 ft
—Pull-up voltage is 24 VDC
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Rosemount 3814 Liquid Ultrasonic Flow Meter 15

Table 1-2: Meter specifications (continued)
Liquid Meter specifications
Transducers •LT-01, LT-03
—Operating Temperature Range -58 °F
to +212 °F (-50 °C to 100 °C)
•LT-04, LT-05, LT-08, LT-09
—Operating Temperature Range -58 °F
to +302 °F (-50 °C to +150 °C)
Note
The process temperature must not exceed
the operating temperature range of the
transducers.
Note
The ultrasonic transducers are not intended
for use across boundary walls of different
hazardous area classifications. The
transmitter electronics cannot be remote
mounted from a Division 1 classification to
a Division 2 area to meet an area
classification.
Communications specifications
Connectivity protocols One serial RS-232/RS-485 ports (115 kbps
baud rate) (Modbus RTU/ASCII)
•(1) Serial Port A (RS-232/RS-485 Full
Duplex/RS-485 Half Duplex)
One Ethernet Port (TCP/IP) 100 BaseT
•Up to 10 Mbps
•Modbus TCP
Device compatibility FloBoss 103, FloBoss S600 flow computer,
ROC 107
Digital, analog, and frequency inputs
Digital Input(s) (Selectable) (1) Single polarity (for flow calibration
gating - contact closure)
•Single input for starting and stopping
•Four pulse configurations available
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Table 1-2: Meter specifications (continued)
Liquid Meter specifications
Analog Input(s) (2) 4-20 mA
•AI-1 Temperature
•AI-2 Pressure
Note
The analog-to-digital conversion accuracy is
within ±0.05% of full scale over the
operating temperature range.
Note
AI-1 and AI-2 are electronically isolated and
operate in sink mode. The input contains a
series resistance so HART® Communicators
can be connected to configure sensors.
A 24 Volt DC power supply is available to
provide power to the sensors.
Digital, analog, and frequency outputs
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Table 1-2: Meter specifications (continued)
Liquid Meter specifications
Frequency/Digital Output(s) The meter has user-configurable selections
for either a frequency output or digital
status (FODO) (Also Frequency/Digital
outputs).
Frequency/Digital Outputs
•FODO1 (eight possible output
configurations)
•FODO2 (eight possible output
configurations)
•FODO3 (eight possible output
configurations)
•FODO4 (eight possible output
configurations)
•FODO5 (eight possible output
configurations)
•FODO6 (eight possible output
configurations)
Frequency or Digital Output parameter
pairs (Frequency/Digital outputs)
Frequency or Digital Outputs (FODO 1,
FODO2, FODO3, FODO4, FODO5, FODO6)
source selections.
•(FO1A, DO1A, FO1B, DO1B, FO2A, DO2A,
FO2B, DO2B)
Mode options:
•Open Collector (requires external
excitation supply voltage and pull-up
resistor)
•TTL (internally powered by the meter 0-5
VDC signal)
Channel B Phase options:
•Lag forward, Lead reverse (Phase B lags
Phase A while reporting forward flow,
leads Phase A while reporting reverse
flow)
•Lead forward, Lag reverse (Phase B
leads Phase A while reporting forward
flow, lags Phase A while reporting
reverse flow)
Phase A and Phase B output (based on flow
direction)
•Reverse flow - output only reports flow
in the reverse direction. For frequency
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Table 1-2: Meter specifications (continued)
Liquid Meter specifications
outputs, Phase B of the output is 90
degrees out of phase with Phase A.
•Forward flow - output only reports flow
in the forward direction. For frequency
outputs, Phase B of the output is 90
degrees out of phase with Phase A.
•Absolute - output reports flow in both
directions. For frequency outputs, Phase
B of the output is 90 degrees out of
phase with Phase A.
•Bidirectional - output reports flow on
Phase A only in the forward direction
and on Phase B only in the reverse
direction.
Maximum frequency for the frequency
outputs
•1000 Hz
•5000 Hz
Analog Output(s) •(1) 4-20 mA independently configurable
analog output (HART)
•(1) 4-20 mA independently configurable
analog output (conventional)
The analog output zero scale offset error is
within ±0.1% of full scale and gain error is
within ±0.2% of full scale. The total output
drift is within ±50 ppm of full scale per °C.
1.8 Pre-installation considerations
•Pipeline equipment code compliance, ANSI, ASME, etc.
•Proper inlet/outlet meter tube piping for reasonable stable flow to the settling
chamber (first meter tube spool upstream of the meter).
•Electrical safety compliance; UL, ULC, ATEX, IECEx etc.
•Civil and structural good practices compliance
•Contractual agreements or governmental compliance (or both)
•In-situ performance test procedures
•In-situ meter calibration
•Field tested advanced meter health and flow dynamics diagnostics
•Data collection and retention procedures
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1.9 Safety conditions
Rosemount 3810 Series Liquid Ultrasonic Meters are approved to the ATEX
Directive 94/9/EC.
Refer to the 3810 Series Systems Wiring Diagram, Sheet 3 (DMC-004936) for the
certification tag (see Engineering Drawings).
Rosemount 3810 Series Liquid Ultrasonic Meters are INMETRO certified. Refer to
the 3810 Series Liquid Ultrasonic Flow Meter Tag, INMETRO Certification drawing
DMC-006173.
Certificate number: NCC 11.0163 X
Marking: --Ex d ia IIB T4 Gb IP66 W
Electrical parameters: Refer to Meter specifications, Table 1-2
Special conditions for safe use
•Explosion proof joint dimensions are compliant with the Brazilian Association
of technical standard: ABNT NBR IEC 60079-1, Table 3.
•The enclosure for the explosion proof transmitter and intrinsically safe barrier
must be remote mounted (refer to Meter specifications, Table 1-2) if the
operating temperature exceeds 140 °F (60 °C) (refer to Meter specifications,
Table 1-2)
•Cable length (refer to Meter specifications, Table 1-2)
WARNING
EXPLOSION OR FIRE HAZARD
Read and follow the instructions below:
•Conduit runs must have a sealing fitting within 457mm (18 inches) of the
enclosure to reduce the risk of an explosion or a fire.
•During operation, keep covers tightly closed. DO NOT open the transmitter
electronics enclosures when an explosive atmosphere may be present.
•During equipment maintenance, disconnect power before opening the
transmitter electronics enclosures. Clean cover joints before replacing.
•DO NOT substitute meter components. Substituting components may
compromise the intrinsic safety of the device.
Failure to follow these safety instructions can result in severe injury to personnel
or cause damage to the equipment.
1.10 Certifications and approvals
Rosemount 3814 Liquid Ultrasonic Flow Meters have electrical, metrology,
intrinsic safety and Pressure Equipment Directive certifications and approvals by
the agencies listed below. Refer to the nameplate tag on the meter body, the
wiring diagram (DMC-004936) in Engineering Drawings and observe all safety
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