Product Data Document 225DS-26J / D301301X012 June 2013 3808 MVT Multivariable Transmitter Model 3808-10A With P/T Variables Featuring: • 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 — operates as an RTU node on SCADA networks • Intrinsically safe and explosion proof for operation in Class I, Division 1 hazardous areas • “Wet end” sensor assembly is independent of the “top end” assembly • Two versions: RS485 with RS232 port for configuration or Analog Output with FSK signal. Introduction The 3808 MVT is Emerson Process Management’s answer to industry demands for a transmitter with high reliability, high performance over real world remote 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 considerations, including purchasing, installation, operation and maintenance. To maximize measurement accuracy, the 3808 combines 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. For remote sites such as those in the energy and water industries, power consumption has been a key consideration. Costs of batteries and solar panels are proportional to current draw and Remote Automation Solutions The 3808 MVT Multivariable Transmitter features accurate measurement of gauge pressure and temperature. many users are surprised at the capital expenses associated 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. For remote sites, power budgeting is often very tight. 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 BSAP (Bristol Synchronous and Asynchronous) protocol ensures compatibility with Emerson’s measurement and SCADA systems, Modbus provides compatibility with a wide variety of controllers, flow computers, RTU devices and SCADA systems from numerous suppliers. Functionality Overview Emerson’s 3808 MVT provides the following basic operations • Conversion of sensor readings from the “wet Product Data Document 225DS-26J / D301301X012 June 2013 end” pressure sensor assembly into accurate floating point pressure values. Conversion calculations utilize correction coefficients contained in the sensor assembly and are performed once per second for each process variable • • • • Conversion of raw readings from an on-board A/D into an accurate floating point RTD value. RTD conversions are performed once per second Up to 19200 baud, 2-wire RS-485 serial communications interface, or a 1200 baud, FSK modem interface via the 4-20ma current loop for Network communication Local RS-232 serial communications interface fixed at 19200 baud. (Connecting to the RS-232 communications interface disables the RS-485 communications.) A subset of the Emerson BSAP RDB and Peer-to-Peer communications interface: Complete set of User/Host Interface functions for Configuration, Calibration, and Data Collection Floating point values returned individually, or in pre-defined Lists Floating point values available for GP, T, Sensor Temperature, and Error Status Floating point, Logical, or String values also available for other user configuration parameters • Optional, 4-to-20 mA Analog Output: Linear or Square Root Mode • 2 3808 Multivariable Transmitter Physical Overview Service: Level, pressure, temperature measurements for liquids and gases. Diaphragm Material: 316 SS or Hastelloy C Connection Material: 316 SS or Hastelloy C Fill Media: DC 200 Silicone Oil Process Connections: ½” - 14 NPT male pipe tap and ⅛” - 27 NPT female pipe thread on single connection Electrical Connections: ½” NPT Conduit Connection Housing: Low Copper Aluminum with epoxy paint NEMA 4X explosion proof. Local indication: 4-½-Digit LCD display linear or square root in engineering units. 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 Operating Voltage Range: 5 – 42 Vdc Current Draw: With RS 485: Less than 2 mA Reversible Output Action With FSK, but with 4 – 20 mA output disabled: Less than 3.2 mA May be controlled externally to provide a remote AO Turn-on time: Optional, on-board LCD display with P and T information Measured input variables will be within specifications less than two seconds after power is applied to the 3808 MVT. www.EmersonProcess.com/Remote Product Data Document 225DS-26J / D301301X012 June 2013 3808 Multivariable Transmitter Accuracy and Performance Specifications All specifications are for the digital, floating-point signal. 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 Gauge Pressure Ambient temperature effect on RTD measurement: Combined effects of nonlinearity, nonrepeatability and hysteresis at reference pressure and over the operating temperature range: ±0.01°C / ºC max GP linear mode: ±0.075% of Calibrated Span or 0.015% of URL, whichever is greater. ± 0.25ºC / month max Temperature effect on gauge pressure: Analog Output Specifications ±0.21%URL maximum combined shift of zero and span with an ambient temperature change of 60ºC (108ºF) Long Term Stability at Constant Conditions: Non-linearity: 0.1% max Temperature effects: +/- 0.25% Full Scale over 60 degrees C. Long Term Stability at Constant Conditions: ±0.1% URL/Year typical Environmental Specifications Ripple and noise: Per ISA 50.1 Section 4.6 Over Pressure Limit: Equal to the gauge pressure upper range limit (URL). Process Temperature - RTD Interface A three-wire platinum RTD per DIN 43760 is supported. The temperature, T, in degrees Celsius is calculated using the Resistance vs. Temperature Tables according to the DIN EN 60751 standard for Class A & B RTDs. The DIN EN 60751 equation is: 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 coefficients of a custom calibrated RTD, another platinum standard or a different material (Nickel, Balco or Copper). During the RTD calibration, the User will be able to set the R0, A, and B coefficients, restore the factory default for these coefficients, and calibrate the internal Reference resistor. www.EmersonProcess.com/Remote Temperature limits: Wet End: -40 to +85ºC Electronics: -40 to +85°C With Display: -30 to +70ºC Storage Temperature: -40 to +100°C Humidity limits: When covers are properly installed, unit will withstand 0 to 100% RH (NEMA 4X enclosure) Vibration: ±0.1%URL/g max 10-500 Hz in any axis per SAMA PMC-33-1C Electromagnetic compatibility: Conditions: Current output (only) twisted pair wires includes RTD. Covers installed and wiring run in grounded conduit. 10V/M, 20-500 MHZ per SAMA PMC-33-1C: GP: ±0.25%URL RTD Temperature: ±1°C 3 Product Data Document 225DS-26J / D301301X012 June 2013 3808 Multivariable Transmitter Liquid Crystal Display (LCD) • Set Modbus Node Address The LCD displays the measured variables for P and T. The display will continually cycle though all measured variables. The value and Engineering Units for a particular variable will be displayed for three seconds. An annunciator indicates which pressure variable is being displayed. • Set Modbus Mode (ASCII/RTU) • Enable/Disable Static Pressure Reading • Enable/Disable RTD Temperature Reading • Read current DP/GP, SP, T, Sensor Temperature, and Status values The LCD provides 4 1/2 digits of display precision with a decimal point. The following Engineering Units are included: • Read DP/GP and SP Upper Range Limits • Calibrate Zero/Span for DP/GP and SP • °C • Calibrate Zero for RTD • °F • Configure RTD Coefficients • BAR • Configure 4-20ma Analog Output • psi Enable/Disable • in H2O @60°F Select Forward/Reverse Acting • kg/cm2 • kPa Select Output Variable (DP/GP, SP, User Defined, or None) Calibrate Zero/Span User Interface for the 3808 MVT • Select Engineering Units for DP/GP, SP, T Using a lap-top personal computer, field personnel can quickly calibrate and configure a 3808 MVT transmitter. 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. • Set Floating Point Damping Factor • Display Transmitter Information (Traceability information, Range Codes, Firmware Revision) Emerson’s LocalView Calibration Tool includes all calibration and configuration operations. This tool will be familiar with users of Smartkit as well as all other Emerson flow computers and provides users of all Emerson measurement products a consistent and compatible Human-Machine Interface (HMI). A variety of User Interface features are provided by the 3808 MVT. These include: • Set Communications Baud Rate • Set BSAP Local Address • Set BSAP Group Number 4 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 Global messages received with the 3808 MVT’s Local Address will be processed by the 3808 MVT. Note that pass through, or routing, of BSAP Global messages, Expanded BSAP messages, and TimeSync/Node Routing Table messages are not supported. 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 Process variables and parameters. www.EmersonProcess.com/Remote Product Data Document 225DS-26J / D301301X012 June 2013 3808 Multivariable Transmitter MODBUS Interface Bendable RTD 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. 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 assembly also includes a fitting, which is installed in the conduit port. To provide support for a variety of Modbus compatible host controllers, the 3808 MVT data available via Modbus are mapped into Modbus Coils/Registers. To accommodate the different types of Modbus hosts available (i.e. standard Modbus, ENRON Modbus) floating point data items are mapped to several 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’s OpenBSI/LocalView – Calibration and configuration software for a PC If ordered along with the transmitter, the bendable RTD assembly will be shipped in the same box as the transmitter. The bendable RTD is a “one size fits all” solution that 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. The 12” probe can quickly be inserted in a thermowell, whereupon the user can tighten the included fitting to lock it in place and bend the excess length out of the way. CD part number: 395575-02-8 Note that a thermowell is required for this bendable RTD! PC-to-3808-MVT Cable – Connects to the RS 232 port on the 3808 MVT, 10 foot, part number: 396596-01-0 Note also that the bendable RTD assembly is approved only for use in Class I, Division 2 hazardous areas and is not explosion proof. Transmitter Interface Unit (TIU) – For compatibility with the 3508, this module is used to connect a PC to the FSK signal on the 3808 MVT. Part Number 389959-01-4 For the TIU, please specify the modem cable length: 6 foot – part number 390929-01-8 12 foot – part number 390929-02-6 25 foot – part number 390929-03-4 www.EmersonProcess.com/Remote 5 Product Data Document 225DS-26J / D301301X012 June 2013 3808 Multivariable Transmitter Model Number: 3808-10A - A - B - C - D - E - F - G - H - J - J1 - K 3808-10A CODE DESCRIPTION 6 AB Input Range (Gauge Pressure) PSI 10 0-15 "H20 to 300 "H20 14 0-1.25 to 0-25 PSI 20 0-5 to 0-100 PSI 22 0-15 to 0-300 PSI 23 0-50 to 0-1000 PSI 25 0-150 to 0-3000 PSI 26 0-250 to 0-5000 PSI (with indication to 10,000 PSI) 27 0-100 to 0-2000 PSI 28 0-200 to 0-4000 PSI 29 3808MVT X3508DIAPH AB C C Diaphragm Material 20 316 Stainless Steel 1 Hastelloy C 2 D Filling Media D 30 DC 200 Silicone 1 E Comm / Output Options E 40 4-20 mA current output / FSK Note: Local calibration requires TIU. 1 RS 485 Note: Local calibration requires RS 232 cable. 2 F Local Indication F 50 None 0 4 1/2 Digit LCD 1 X3808LIND XTRANMTBKT G G Mounting Bracket 60 None 0 With Mounting Bracket 1 H Certification H 70 UL/CUL Class I, Division 1, Groups C & D; Class I, Division 2, Groups A,B,C,D 1 www.EmersonProcess.com/Remote Product Data Document 3808 Multivariable Transmitter 225DS-26J / D301301X012 June 2013 Model Number: 3808-10A - A - B - C - D - E - F - G - H - J - J1 - K 3808-10A Model Specification Continued J Warning Plate J 80 None 0 Russian 1 RTD / Cable Assembly J1 J1 85 None Please refer to the notes, below, concerning 0 With RTD and 6-foot Cable the RTD Cable Assemblies. 1 With RTD and 15-foot Cable 2 With RTD and 25-foot Cable 3 DESCRIPTION CODE If selected in "J1" above, the RTD/Cable assembly will be shipped in the same box as the transmitter. Due to UL restrictions, they cannot be shipped "pre-connected." IMPORTANT: These particular RTD assemblies are not explosion-proof but are approved for Class I, Division 2 hazardous areas. For explosion-proof RTD components, please refer to "RTD Sensors and Related Accessories" in the price book. K Factory Configuration Options K 88 Use the Standard, Defaults - Please DO NOT fill-in attachment 3800-A010 0 Specify Other Configuration Settings - Please proceed to attachment 3800A010. 1 To specify a 3808 MVT that is approved by Industry Canada for custody transfer installations when used in conjunction with a ControlWave EFM or ControlWave XFC, please use the following model number and attachment number: 3808-10A-28-112-001-000 3808-B-1 www.EmersonProcess.com/Remote 7 Product Data Document 225DS-26J / D301301X012 June 2013 3808 Multivariable Transmitter Attachment Number: 3800-A - AB - CD - E - F - GH - J - KL - M - N - P - R - T - U 3800-A CODE DESCRIPTION AB DP Units for 3808-30A or GP units for 3808-10A AB In H2O (Default) Special Note for 25 PSI DP range: If you use 00 PSI this attachment, "In H2O" become the default 01 mmH2O units. If you want "PSI," you must specify 02 ftH20 that, here. 03 inHg 04 mmHg 05 90/160 KPa 06 MPa 07 BAR 08 mBAR 09 g/cm2 10 kg/cm2 11 SP Units for 3808-30A - Please note that this field is N/A for the 3808-10A CD In H2O 00 PSI (Default) 01 mmH2O 02 ftH20 03 inHg 04 mmHg 05 CD 92/170 KPa 06 MPa 07 BAR 08 mBAR 09 g/cm2 10 kg/cm2 11 Temperature Units for RTD Input E Degrees C (Default) 0 E 94/200 Degrees F F 8 1 Communications Baud Rate F 9600 (Default) 0 1200 1 96/205 2400 2 4800 3 19,200 4 www.EmersonProcess.com/Remote Product Data Document 3808 Multivariable Transmitter 225DS-26J / D301301X012 June 2013 Attachment Number: 3800-A - AB - CD - E - F - GH - J - KL - M - N - P - R - T - U 3800-A DESCRIPTION GH BSAP Local Address CODE GH Using two digits, including a leading zero for 1 - 9, please specify the address in 98/210 'GH,' ie. "01" through "32." For reference, the default address is 1. J BSAP Group Number J 100/300 Please fill-in a single-digit between 1 and 8 in 'J.' Group 1 is the default. KL MODBUS Node Address KL Using two digits, including a leading zero for 1 - 9, please specify the address in 102/310 'GH,' e.g. "01" through "32." For reference, the default address is 1. M MODBUS Mode M ASCII (Default) 0 104/320 RTU N ENABLE / DISABLE 4 - 20 mA Output N ENABLE (Default) 0 106/330 DISABLE P P LINEAR (Default) 0 R FORWARD (Default) 0 1 4 - 20 mA OUTPUT VARIABLE T DP (in 3808-30A) or GP (in 3808-10A) (Default) 0 112/360 SP (3808-30A only) U 1 4 - 20 mA FORWARD or REVERSE ACTING 110/350 REVERSE T 1 4 - 20 mA LINEAR or SQUARE ROOT 108/340 SQUARE ROOT R 1 1 TEMPERATURE 2 RTS DELAY U 10 ms Default 0 50 ms that is known to work best for Chesapeake CW LP 115/365 using Modbus www.EmersonProcess.com/Remote 1 9 Product Data Document 225DS-26J / D301301X012 June 2013 3808 Multivariable Transmitter DIMENSIONED DRAWING 3808-10A with Mounting Bracket Shown 10 www.EmersonProcess.com/Remote Product Data Document 3808 Multivariable Transmitter 225DS-26J / D301301X012 June 2013 Simplified Diagram of 3808 MVT with 4 – 20 mA Signal Simplified Diagram of 3808 MVT with RS 232 and RS 485 Interface www.EmersonProcess.com/Remote 11 Product Data Document 225DS-26J / D301301X012 June 2013 3808 Multivariable Transmitter 3808 MVT Wire Routing 3808 MVT Terminal Block Assignments 12 www.EmersonProcess.com/Remote Product Data Document Multivariable Transmitter 225DS-26J / D301301X012 June 2013 Headquarters: Emerson Process Management Remote Automation Solutions 6005 Rogerdale Road Houston, TX 77072 U.S.A. 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