Bristol 3808 MVT Multivariable Transmitter - Emerson · Product Data Document 225DS-25h /...

Product Data Document225DS-25h / D301300X012April 2011 - Page 1

Website: www.EmersonProcess.com/Remote

Remote Automation Solutions

Bristol® 3808 MVT Multivariable TransmitterModel 3808-30A With DP/P/T Variables

Featuring:Now featuring 4000 psi pressure range •

Excellent measurement performance over •the full range of operating pressure and temperature conditions

Extremely low power consumption—perfect •for remote sites with battery and solar power systems

“Bilingual” Networking via BSAP • and Modbus protocols with RS 485 interface

Two versions: RS485 with RS232 port for •configurationorAnalogOutputwithFSKsignal

Intrinsically safe and explosion proof for •operation in Class I Division 1 hazardous areas

Bidirectional DP measurement•

DP/P “wet end” sensor assembly is independent •of the “top end” assembly

Introduction

The Bristol® 3808 MVT is Emerson Process Man-agement’s answer to industry demands for a trans-mitter with high reliability, high performance over real world pressure and temperature conditions, ease in use, “networkability” and very low power consumption. The 3808 MVT has been designed to provide the highest value in terms of all user consid-erations, including purchasing, installation, opera-tion and maintenance.

To maximize measurement accuracy, the 3808 com-bines a wet end with a low reference uncertainty of 0.075% URL, with a design that minimizes effects of pressure and temperature over the full range of operating conditions.

Forremotesitessuchasthoseintheenergyand

The Bristol® 3808 MVT Multivariable Trans-mitter features accurate measurement of

DP, gauge pressure and temperature.

water industries, power consumption has been a key consideration. Costs of batteries and solar panels are proportional to current draw and many users are surprised at the capital expenses associ-ated with electronics, which have not been designed to conserve power. The sophisticated design employed by the 3808 MVT keeps current draw well below 2 mA and with a power source as low as 5 Vdc.

Forremotesites,powerbudgetingisoftenverytight. Since the power consumption is so low, the 3808 MVT can even be added to existing sites, which were designed with no extra capacity for power.

While the Bristol Synchronous and Asynchronous (BSAP) protocol ensures compatibility with Emerson measurement and SCADA systems, Modbus pro-vides compatibility with a wide variety of controllers, flowcomputers,RTUdevicesandSCADAsystemsfrom numerous suppliers.

Product Data Document225DS-25h / D301300X012April 2011 - Page 2 Bristol® Multivariable Transmitter

Remote Automation SolutionsWebsite: www.EmersonProcess.com/Remote

Functionality OverviewEmerson’s Bristol 3808 MVT provides the •following basic operations:

Conversion of sensor readings from the “wet •end” DP/P sensor assembly into accurate floatingpointpressurevaluesforDPandP.Conversion calculations utilize correction coefficientscontainedinthesensorassemblyand are performed once per second for each process variable

Conversion of raw readings from an on-board •A/DintoanaccuratefloatingpointRTDvalue.RTD conversions are performed once per second

Up to 19200 baud, 2-wire RS-485 serial •communicationsinterface,ora1200baud,FSKmodem interface via the 4-20ma current loop for Network communication

Local RS-232 serial communications interface •fixedat19200baud.(ConnectingtotheRS-232communications interface disables the RS-485 communications

A subset of the Emerson BSAP RDB and Peer-•to-Peer communications interface:

• CompletesetofUser/HostInterfacefunctionsforConfiguration,Calibration,and Data Collection

• Floatingpointvaluesreturnedindividually,orinpre-definedLists

• FloatingpointvaluesavailableforDP/GP,SP, T, Sensor Temperature, and Error Status

• Floatingpoint,Logical,orStringvaluesalso available for other ST3808 user configurationparameters

Optional,4-to-20mAAnalogOutput:•

• LinearorSquareRootMode

• ReversibleOutputAction

• MaybecontrolledexternallytoprovidearemoteAO

Optional,on-boardLCDdisplaywithDP,Pand•T information

Physical Overview

Service:Flow,level,pressure,temperaturemea-surementsforliquidsandgases.

DiaphragmMaterial:316SSorHastelloyC

FlangeMaterial:316SSorHastelloyC

FlangeBoltMaterial:316SS

FillMedia:DC200SiliconeOil

ProcessConnections:¼“NPTonflanges1/2“NPTwith connection blocks.

Electrical Connections: ½” NPT Conduit Connection

Housing:LowCopperAluminumwithepoxypaintNEMA 4X explosion proof.

Local indication: 4-½-Digit LCD display linear or squarerootinengineeringunits.

RTD sensor: 3-wire platinum 100-ohm per DIN 43760 25 feet max.

User connections: 10-terminal (2-rows) tri-barrier strip for + power, -power, RTD +, RTD-, RTD-, TXD, and RXD.

Power Supply Information

OperatingVoltageRange:5–42Vdc

Current Draw:

With RS 485: Less than 2 mA (typically 900 mA)

WithFSK,butwith4–20mAoutputdisabled:Lessthan 3.2 mA

Turn-on time:

Measuredinputvariableswillbewithinspecifica-tions less than two seconds after power is applied to the 3808 MVT.

Accuracy and Performance Specfications

Allspecificationsareforthedigital,floating-pointsignal.

Differential Pressure and Static Pressure

Combined effects of nonlinearity, nonrepeatability and hysteresis at reference pressure and over the operating temperature range:

DP and SP linear mode: ±0.075% of Calibrated Span or 0.015% of URL, whichever is greater. ±0.035% of span or 0.015% of URL for 1000 psi static pressure only, whichever is greater.

Temperature effect on Static and Differential pres-sure:

±0.21%URL maximum combined shift of zero and span with an ambient temperature change of 60ºC (108ºF).±0.17%URLmax.for1000psistaticpres-sure range.

StaticPressureEffectsOnDifferentialPressure:

Zero error: ±0.1% URL, for a change in static pres-sure of 1000 psi

Span error: ±0.1% reading, for a change in static pressure of 1000 psi

Long Term Stability at Constant Conditions:

±0.1% URL/Year typical

Mountingpositioneffect:±2inH2Omaximum,which can be calibrated out.

Ripple and noise: Per ISA 50.1 Section 4.6

Process Temperature - RTD Interface

A three-wire platinum RTD per DIN 43760 is sup-ported. The temperature, T, in degrees Celsius is calculated using the Resistance vs. Temperature Tables according to the DIN EN 60751 standard for ClassA&BRTDs.TheDINEN60751equationis:

R(t) = R0 * (1 + At +Bt2)

Where:A = 3.9083 * 10-3 oC-1

B = -5.775 * 10-7 oC-2

Ro = 100ohms

In addition, the user may enter the R0, A, and B coefficientsofacustomcalibratedRTD,anotherplatinum standard or a different material (Nickel, Balco or Copper). During the RTD calibration, the User will be able to set the R0,A,andBcoefficients,restorethefactorydefaultforthesecoefficients,andcalibrate the internal Reference resistor.

Process Temperature Input Specifications (for the interface, only, not including the RTD probe or wiring)

RTD Conversion Accuracy: ± 0.1°C, or ± 0.1% of reading, whichever is greater

Ambient temperature effect on RTD measurement:

±0.01°C / ºC max

Long Term Stability at Constant Conditions:

± 0.25ºC / month max

Analog Output Specifications

Non-linearity: 0.1% max

Temperatureeffects:+/-0.25%FullScaleover60degrees C.

Environmental Specifications

OverPressureLimit:Equaltothestaticpressureupper range limit (URL).

Temperature limits:Wet End: -40 to +85ºCElectronics: -40 to +85°CWith Display: -30 to +70ºCStorage Temperature: -40 to +100°C

Humiditylimits:Whencoversareproperlyinstalled,

unitwillwithstand0to100%RH(NEMA4Xenclo-sure)

Vibration:±0.1%URL/gmax10-500Hzinanyaxisper SAMA PMC-33-1C

Electromagnetic compatibility:

Conditions: Current output (only) twisted pair wires includes RTD. Covers installed and wiring run in groundedconduit.10V/M,20-500MHZperSAMAPMC-33-1C:

DP and SP: ±0.25%URLRTD Temperature: ±1°C

Liquid Crystal Display (LCD)

The LCD displays the measured variables for DP, P, and T. The display will continually cycle though all measured variables. The value and Engineer-ing Units for a particular variable will be displayed for three seconds. An annunciator indicates which pressure variable is being displayed.

The LCD provides 4 1/2 digits of display precision with a decimal point. The following Engineering Units are included:

°C•

°F•

BAR•

psi•

inH• 2O@60°F

kg/cm• 2

kPa•

User Interface For The 3808 MVT

Usingalap-toppersonalcomputer,fieldpersonnelcanquicklycalibrateandconfigurea3808MVTtransmitter. The personal computer interfaces to the RS 232 port. Meanwhile, the RS 485 port wiring need not be disconnected. RS 485 communication is disabled only while the PC cable is connected to the RS 232 terminals.

Emerson’s LocalView Calibration Tool includes all calibrationandconfigurationoperations.Thistoolwill be familiar with users of Smartkit as well as all otherBristolflowcomputersandprovidesusersofall Bristol measurement products, from Emerson, a consistentandcompatibleHMI.

A variety of User Interface features are provided by the 3808 MVT. These include:

Set Communications Baud Rate•

Set BSAP Local Address•

SetBSAPGroupNumber•

Set Modbus Node Address •

Set Modbus Mode (ASCII/RTU)•

Enable/Disable Static Pressure Reading •

Enable/Disable RTD Temperature Reading•

ReadcurrentDP/GP,SP,T,Sensor•Temperature, and Status values

ReadDP/GPandSPUpperRangeLimits•

CalibrateZero/SpanforDP/GPandSP•

Calibrate Zero for RTD•

ConfigureRTDCoefficients•

Configure4-20maAnalogOutput•

• Enable/Disable

• SelectLinear/SquareRootMode

• SelectForward/ReverseActing

• SelectOutputVariable(DP/GP,SP,UserDefined,orNone)

• CalibrateZero/Span

SelectEngineeringUnitsforDP/GP,SP,T•

SetFloatingPointDampingFactor•

Display Transmitter Information (Traceability •information,RangeCodes,FirmwareRevision)

Communication Interface

BSAP Interface

The 3808 MVT will act as an immediate response BSAP Slave device. The 3808 MVT will function as a terminal node only in a BSAP Network. BSAP Globalmessagesreceivedwiththe3808MVT’sLocal Address will be processed by the 3808 MVT. Notethatpassthrough,orrouting,ofBSAPGlobalmessages, Expanded BSAP messages, and Time-Sync/Node Routing Table messages are not sup-ported.

A subset of the RDB and Peer-to-peer messages are supported. This will provide the user both RDB and Peer-to-Peer List access to the 3808 MVT Pro-cess variables and parameters.

MODBUS Interface

The 3808 MVT will act as a Modbus compatible, slave device. The 3808 MVT provides support for both Modbus ASCII and Modbus Remote Terminal Unit (RTU) transmission modes, utilizing a subset of the Read/Write commands available via Modbus.

To provide support for a variety of Modbus compat-ible host controllers, the 3808 MVT data available via Modbus are mapped into Modbus Coils/Regis-ters. To accommodate the different types of Modbus hostsavailable(i.e.standardModbus,ENRONModbus)floatingpointdataitemsaremappedtoseveral different Modbus Register address ranges. This provides both 16-bit and 32-bit register access using the appropriate register address and function code.

Accessories

Emerson’sBristolOpenBSI/LocalView–CalibrationandconfigurationsoftwareforaPC

CD part number: 395575-02-8

PC-to-3808-MVTCable–ConnectstotheRS232 port on the 3808 MVT, 10 foot, part number: 396596-01-0

TransmitterInterfaceUnit(TIU)–Forcompatibilitywith the 3508, this module is used to connect a PC totheFSKsignalonthe3808MVT.

Part Number 389959-01-4

FortheTIU,pleasespecifythemodemcablelength:

6foot–partnumber390929-01-812foot–partnumber390929-02-625foot–partnumber390929-03-4

Bendable RTD

The user can select a bendable RTD that attaches to the transmitter via an armored cable of 6-foot, 15-foot or 25-foot length. The individual wires connect to terminations on the termination plate. The RTD assemblyalsoincludesafitting,whichisinstalledinthe conduit port.

If ordered along with the transmitter, the bendable RTD assembly will be shipped in the same box as the transmitter.

ThebendableRTDisa“onesizefitsall”solutionthat is perfect for most applications and excellent for depot-level inventory situations in which the ultimate installation (and, therefore, thermowell depth) is not necessarily known.

The12”probecanquicklybeinsertedinathermowell, whereupon the user can tighten the in-cludedfittingtolockitinplaceandbendtheexcesslength out of the way.

NotethatathermowellisrequiredforthisbendableRTD!

Note also that the bendable RTD assembly is ap-proved only for use in Class I, Division 2 hazardous areas and is not explosion proof.

Model Number: 3808-30A - A B C - D E F - G H J - K L M - N P Q R3808-30A X380830A

DESCRIPTION CODEA B C Input Range Differential (inH2O) Static Pressure (PSI) A B C

10 0-7.5 to 0-150 1000 1210-7.5 to 0-150 2000 1220-15 to 0-300 1000 1410-15 to 0-300 2000 1420-15 to 0-300 3000 1450-15 to 0-300 4000 1440-1.25 to 0-25 PSID 2000 2020-1.25 to 0-25 PSID 3000 2050-1.25 to 0-25 PSID 4000 204

D Diaphragm Material D316 Stainless Steel 1

20 HastelloyC 2 E Filling Media E30 DC 200 Silicone 1 F Flange Material X3808FLA F

316 Stainless Steel Match D - diaphragm 140 HastelloyC material 2G Flange Vent Valve X3808VENT G

None 050 With Vent Valve - 316 SS Note: Flange Material, F = 1 1

WithVentValve-HastelloyC Note: Flange Material, F = 2 2H Manifold Adapter X3808MAN H

None Match F - 0 60 Stainless Steel Flange 1

HastelloyC Material 2J Comm / Output Options J 4-20mAcurrentoutput/FSK Note: Local calibration requires TIU. 1 70 RS 485 Note: Local calibration requires RS 232 cable. 2

Model Number: 3808-30A - A B C - D E F - G H J - K L M - N P Q R3808-30A

DESCRIPTION CODEK Local Indication X3808LIND K None 080 4 1/2 Digit LCD 1L Flange Orientation L

Standard (faces away from front) 190 90 degrees (down) (Default) 2

Note: Housing is very easy to rotate 180 degrees around in the field. M Mounting Bracket X3808MTG M

None 0With"L"FlangedMounting Not avail. with 90 deg. (down) 1

100 Bracket flange orientation (Option K=2)Neck Mounted Bracket With any Flange Orientation 2

N Certification N110 UL/CULClassI,Division1,GroupsC&D;ClassI,Division2,GroupsA,B,C,D 1

P Warning Plate PNone 0

120 Russian 1Q RTD / Cable Assembly Q

None Please refer to the notes, 0With RTD and 6-foot Cable below, concerning the RTD / 1

125 With RTD and 15-foot Cable Cable Assemblies. 2With RTD and 25-foot Cable 3

NOTES: RTD/CABLE ASSEMBLIESIf selected in "Q" above, the RTD/Cable assembly will be shipped in the same box as thetransmitter. Due to UL restrictions, they cannot be shipped "pre-connected."IMPORTANT:TheseparticularRTDassembliesarenotexplosion-proofbutareapprovedforClassI,Division2hazardousareas.Forexplosion-proofRTDcomponents,pleaserefer to "RTD Sensors and Related Accessories" in the Bristol price book.

RFactory Configuration Options RUse the Standard, Defaults - Please DO NOT fill-in attachment 3800-A010 0

130 SpecifyOtherConfigurationSettings-Please proceed to attachment 3800-A010. 1

To specify a 3808 MVT that is approved by Industry Canada for custody transfer installations when used in conjunction with a ControlWaveEFMorControlWaveXFC,pleaseusethefollowingmodelnumberandattachmentnumber:

3808-30A-142-111-102-020-1000 3808-B-1

Attachment Number: 3800-A - AB - CD - E - F - GH - J - KL - M - N - P - R - T - U3800-A

DESCRIPTION CODEA B DP Units for 3808-30A or GP units for 3808-10A A B

InH2O(Default) Special Note for 25 PSI DP range: If you use 00PSI this attachment, "In H2O" become the default 01mmH2O units. If you want "PSI," you must specify 02ftH20 that, here. 03inHg 04mmHg 05

90/160 KPa 06MPa 07BAR 08mBAR 09g/cm2 10kg/cm2 11

C D SP Units for 3808-30A - Please note that this field is N/A for the 3808-10A CDInH2O 00PSI (Default) 01mmH2O 02ftH20 03inHg 04mmHg 05

92/170 KPa 06MPa 07BAR 08mBAR 09g/cm2 10

kg/cm2 11E Temperature Units for RTD Input E

Degrees C (Default) 094/200 DegreesF 1

F Communications Baud Rate F9600 (Default) 01200 1

96/205 2400 24800 319,200 4

Attachment Number: 3800-A - AB - CD - E - F - GH - J - KL - M - N - P - R - T - U3800-A

DESCRIPTION CODEG H BSAP Local Address GH

Using two digits, including a leading zero for 1 - 9, please specify the address in98/210 'GH,'ie."01"through"32."Forreference,thedefaultaddressis1.

J BSAP Group Number J100/300 Pleasefill-inasingle-digitbetween1and8in'J.'Group1isthedefault.

K L MODBUS Node Address KLUsing two digits, including a leading zero for 1 - 9, please specify the address in

102/310 'GH,'e.g."01"through"32."Forreference,thedefaultaddressis1.M MODBUS Mode M

ASCII (Default) 0104/320 RTU 1

N ENABLE / DISABLE 4 - 20 mA Output NENABLE (Default) 0

106/330 DISABLE 1P 4 - 20 mA LINEAR or SQUARE ROOT P

LINEAR (Default) 0 108/340 SQUAREROOT 1

R 4 - 20 mA FORWARD or REVERSE ACTING RFORWARD(Default) 0

110/350 REVERSE 1 T 4 - 20 mA OUTPUT VARIABLE T

DP(in3808-30A)orGP(in3808-10A)(Default) 0112/360 SP (3808-30A only) 1

TEMPERATURE 2U RTS DELAY U

10 ms Bristol Default 0

115/365

50 ms that is known to work best for Chesapeake CW LP using Modbus

DIMENSIONED DRAWINGS

3808 MVT with Manifold Adapters Shown

3808 MVT with “L” Flanged Mounting Bracket

3808 MVT with Neck Mounted Bracket

Simplified Diagram of 3808 MVT with 4 – 20 mA Signal

Simplified Diagram of 3808 MVT with RS 232 and RS 485 Interface

COMPENSATIONELECTRONICS

ELECTRONICS HOUSING

SENSOR MODULEASSY.

FLANGE(HI Side)

LO PORTOVERPRESSUREMECHANISM And

DIAPHRAGM

FLANGE(LO Side)

ISOLATIONDIAPHRAGM

HI PORT

HIGH SIDE FLUID SYSTEM

LOW SIDE FLUID SYSTEM

CPU BOARD

5 to 42VdcPowerSupply

RS-232Interface

RS-485Interface

SPIBUS

3808 MVT Terminal Block Assignments

3808 MVT Wire Routing

Emerson Process ManagementRemote Automation Solutions

Watertown, CT 06795 USA T 1 (860) 945-2200Mississauga,ON06795Canada T1(905)362-0880WorcesterWR38YBUK T44(1)905-856950

Website: www.EmersonProcess.com/Remote

Bristol,Inc.,BristolCanada,BBISAdeCVandEmersonProcessManagementLtd,RemoteAutomationSolutionsdivision(UK),arewhollyownedsubsidiariesofEmersonElectricCo.doingbusinessasRemoteAutomationSolutions(“RAS”),adivisionofEmersonProcessManagement.FloBoss,ROCLINK,Bristol,BristolBabcock,ControlWave,TeleFlowandHelicoidare trademarks of RAS. AMS, PlantWeb and the PlantWeb logo are marks of Emerson Electric Co. The Emerson logo is a trademark and service mark of the Emerson Electric Co. All other marks are property of their respective owners.

The contents of this publication are presented for informational purposes only. While every effort has been made to ensure informational accuracy, they are not to be construed as war-ranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. RAS reserves the right to modify or improve the designs or specificationsofsuchproductsatanytimewithoutnotice.AllsalesaregovernedbyRAS’termsandconditionswhichareavailableuponrequest.RASdoesnotassumeresponsibilityforthe selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any RAS product remains solely with the purchaser and end-user.

Bristol 3808 MVT Multivariable Transmitter - Emerson · Product Data Document 225DS-25h /...

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