USER’S MANUAL UM344-2 Issue 1 August 1995 XTC TRANSMITTERS SERIES 344 TERMPERATURE TRANSMITTERS USER’S MANUAL
UM344-2 CONTENTS TABLE OF CONTENTS SECTION AND TITLE PAGE 1.0 INTRODUCTION .................................................................................................................1-1 1.1 SECTION CONTENTS......................................................................................................1-1 1.2 PRODUCT DESCRIPTION...............................................................................................1-3 1.3 CONFIGURATION ..................................................
CONTENTS SECTION AND TITLE UM344-2 PAGE 4.3.6 Network Junctions .................................................................................................... 4-11 4.3.7 Safety Barriers......................................................................................................... 4-12 4.3.8 Connection of Miscellaneous Hardware ..................................................................... 4-12 4.3.9 Determine Sensor Cable Requirements............................... ...............
UM344-2 CONTENTS SECTION AND TITLE 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 PAGE 6.1.3 RTD/OHM Type Input Calibration ..............................................................................6-6 6.1.3.1 RTD/OHM Calibration Check............................................................................6-6 6.1.3.2 Current Source Calibration .................................................................................6-7 6.1.4 Thermocouple/Millivolt Type Input Calibration .............................
CONTENTS SECTION AND TITLE UM344-2 PAGE 9.0 GLOSSARY ...........................................................................................................................
UM344-2 CONTENTS SECTION AND TITLE PAGE A.0 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS...................................................A-1 B.0 APPENDIX B - HAZARDOUS AREA INSTALLATION.................................................. B-1 WARRANTY .............................................................................................................................. W-1 PARTS LIST LIST OF ILLUSTRATIONS FIGURE AND TITLE PAGE 1-1 Basic Model 344 ....................................................
CONTENTS UM344-2 SECTION AND TITLE PAGE LIST OF TABLES 4.1 Operating Mode and Network Type ...........................................................................................4-3 4.2 Thermocouple and Extension Grade Wire Characteristics .......................................................... 4-32 5.1 Output Display Code Choices................................................................................................... 5-12 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.
CONTENTS vi UM344-2 September 1995
UM344-2 INTRODUCTION 1.0 INTRODUCTION This User’s Manual is for the XTC™ Model 344 Smart Temperature Transmitter. It covers both the Transmitter-Controller and Transmitter only versions. NOTE Throughout this Manual the term Transmitter will include both versions except when the Transmitter-Controller is specifically stated and when discussing unique Transmitter-Controller features, such as the Controller function block.
INTRODUCTION UM344-2 Section 8, MODEL DESIGNATION AND SPECIFICATIONS, furnishes tables describing transmitter model numbers, and it contains mechanical, functional, performance, and environmental specifications. Hazardous area certifications are also listed. Before installing or servicing a transmitter, read the information on the nameplate and ensure that the correct model is at hand and that the correct procedures are followed.
UM344-2 INTRODUCTION MXC Connections Test (+) Terminal Test (-) Terminal Ground Screw Signal (+) Terminal SIGNAL Notes: TEST + 1. Viewed with enclosure cap removed. 2. MXC = Moore XTC Communicator. Signal (-) Terminal Sensor Terminals for Thermocouple, RTD, Ohms,or mV Input X02869S1 FIGURE 1-2 Terminal Connections 1.
INTRODUCTION UM344-2 The HART protocol is used for communication between the transmitter and a Moore XTC Communicator (MXC), a personal computer running MXTC Configuration Software or other remote device. A typical communication can be to: transfer a new and edited configuration, remotely monitor the process variable, or service a transmitter. DIGITAL MODE: One to fifteen transmitters can be parallel connected to a Multi-Drop Network using only twisted-pair cable.
UM344-2 XTC COMMUNICATOR 2.0 XTC COMMUNICATOR The Moore XTC Communicator (MXC) is a HART protocol-based, hand-held instrument capable of communicating with HART conformant instruments from Moore Products Co. and from other manufacturers. It provides full access to on-line and off-line configuration data and to monitoring of process variables. An MXC is shown in Figure 2-1. When used with HART-conformant field instruments, the MXC can: • Store up to 100 instrument configurations in its non-volatile memory.
XTC COMMUNICATOR UM344-2 MOORE XTC COMMUNICATOR F4 F1 F2 F3 TREND ZOOM STATUS CHANGE A B C D E F G H I SP 1 2 3 CHANGE J K L M N O P Q R VALVE 4 5 6 S T U V W X Y Z # 7 8 9 @ % & SPACE + / * __ 0 . SHIFT SHIFT SHIFT ON OFF TRANS.
UM344-2 XTC COMMUNICATOR 2.1 DISPLAY The MXC has a 5 by 8 dot matrix Liquid Crystal Display (LCD) with four lines of twenty characters each to show configuration parameters, operating status, on-line variables, and trends. The LCD has a back light that can be turned on for viewing in dimly lighted areas. SELECT BLOCK TO EDIT - SENSOR INPUT SELPREV NEXT END ECT All MXC screens have a similar layout.
XTC COMMUNICATOR UM344-2 BACK LIGHT - This key turns on the LCD back light for easier viewing of the display in a dimly lighted area. The back light is activated by pressing the key and is deactivated by again pressing the key. NOTE The back light consumes significant power. To extend battery life, use the back light only when needed. TRANS. VAR'S.
UM344-2 XTC COMMUNICATOR AUTO/MANUAL - The A/M key toggles the controller between automatic and manual control. Press the “MANUAL”, key F1, or “AUTO”, key F2 to change state. Press “A/M” key again, or F4, to exit this mode. TUNE - This key allows tuning of the controller. The first screen displays the controller action, DIRECT or REVERSE. The controller action may be viewed from the TUNE key, but it must be changed in the configuration mode. Press F4 to continue.
XTC COMMUNICATOR UM344-2 2.3 LOOP CONNECTION The MXC is quickly connected into a transmitter loop. A 40" (1m) cable with a dual banana plug on one end and two mini-grabber clips on the other is provided. The dual banana plug is inserted into the bottom of the MXC. The mini-grabber clips are connected to the Model 344's signal terminals or to the loop's current sense resistor, usually at a receiving instrument such as a Model 352 Single -Loop Digital Controller (see notes below).
UM344-2 XTC COMMUNICATOR 2.4 POWER Six "AA" alkaline batteries are supplied with the MXC. Remove the rear cover to access the battery compartment, as shown in the figure. Typical operating time of the MXC with new batteries and the back light off is approximately 80 hours; with new batteries and the back light on, approximately 30 hours. Battery Access Cover + + Batteries + A Low Battery indicator (LB) is displayed in the lower right corner of the LCD when about one-half of the battery charge is spent.
XTC COMMUNICATOR Main Menu UM344-2 SELECT FUNCTION FIND ARCH XMTR FUNC On-Line Menu END Dev ID: 210300003C Tag: TTC-101 ADD: 00 LOOP OVRD On-Line Configuration Menu TEST MXC CAL/ CON TEST FIG END CONFIGURATION MODE EDIT EDIT ARCH CONF END Calibrate/Test Menu CALIBRATE / TEST CAL Function Block Menu TEST END SELECT BLOCK TO EDIT - SENSOR INPUT SELPREV NEXT END ECT Configuration Complete Menu CONFIGURATION COMPLETE REQUIT SAVE VIEW DOWN LOAD Loop Override Menu LOOP OVERRIDE - CHOOSE CURREN
UM344-2 XTC COMMUNICATOR MXC SELF TEST MENU TEST KEYS MAIN MENU TEST MXC LOOP OVERRIDE MENU ABORT ABORT 4mA ENTER PROCEED 20mA END TEST SCRN ON-LINE MENU END ABORT END LOOP OVRD ENTER END QUIT OTHER ENTER mA END ANALOG SHORT ADDR FIND XMTR DIGI -TAL END END ABORT PROCEED TRIM DAC CONT ABORT ZERO CONT POLL CALIBRATE/TEST MENU END CAL SRCH TAG CAL/ TEST ENTER TAG TEST PROCEED SELF TEST END ABORT ABORT CONT ABORT END ON-LINE CONFIGURATION MENU DOWN LOAD DOWN LOA
XTC COMMUNICATOR 2-10 UM344-2 September 1995
UM344-2 INITIAL TRANSMITTER SET-UP 3.0 INITIAL TRANSMITTER SET-UP Before operating a Model 344 on-line, the instrument should be commissioned using the MXC and set-up either at the bench or in the field. Commissioning consists of checking that the transmitter and the loop are operational and that all configuration information is correct. This section contains step-by-step procedures describing commissioning of the transmitter. For an in-depth discussion of transmitter configuration, refer to Section 5.
INITIAL TRANSMITTER SET-UP UM344-2 MXC 250 Bench Power Supply (DC) _ + Signal _ + + _ Digital Milliammeter + _ Digital Milliammeter Test _ + Model 344 Terminals X02807S1 Resistance Decade Box FIGURE 3-1 Bench Test Connections Circuit Junction Controller, Recorder, Indicator, or other 1-5 Vdc Device System Power Supply MXC + 250 _ _ + Signal Test _ + _ + X02808S1 Model 344 Terminals Sensor Wires FIGURE 3-2 Typical Field Test Connections 3-2 September 1995
UM344-2 INITIAL TRANSMITTER SET-UP 3.2 ESTABLISHING COMMUNICATION 1. Connect the transmitter as shown in either Figure 3-1 or 3-2. 2. Apply power to the loop. SELECT FUNCTION FIND ARCH XMTR FUNC TEST MXC END SEARCH FOR WHAT TYPE OF TRANSMITTER? ANA- DIGSRCH LOG ITAL TAG END 3. Press and momentarily hold the MXC's ON key. The first screen that will appear after the initial power up screens is the Main Menu, shown adjacent.
INITIAL TRANSMITTER SET-UP UM344-2 NOTE Analog and Digital modes are discussed in detail in Section 4. SHORT OR LONG FORM ADDRESS? SHRT LONG ADDR ADDR POLL END ENTER TRANSMITTER ADDRESS (1-15) < END ENTER ENTER TRANSMITTER ADDRESS: < END ENTER SEARCHING FOR TRANSMITTER PLEASE WAIT XMTR ID: 210100044F TAG: MPCO 340 ADD: 01 LAST NEXT SELXMTR XMTR END ECT 5. The MXC will next prompt for a digital method of searching. Press one of the following keys.
UM344-2 INITIAL TRANSMITTER SET-UP WOULD YOU LIKE TO SAVE TRANSMITTER DATA IN ARCHIVES NO YES ENTER ARCHIVE NUMBER (0-99): EN< > END TER Dev ID: 210300003C Tag: TTC-101 ADD: 00 LOOP OVRD CAL/ CON TEST FIG END 3.3 TESTING THE TRANSMITTER, MXC, AND THE LOOP 3.3.1 MXC Testing SELECT FUNCTION FIND ARCH XMTR FUNC TEST MXC The MXC can now be used to calibrate or configure the transmitter, monitor loop parameters, or test loop functionality.
INITIAL TRANSMITTER SET-UP UM344-2 screen will display a character associated with that key. The screen will show up to 10 characters before erasing the oldest.
UM344-2 INITIAL TRANSMITTER SET-UP MXC SCREEN TEST ABOUT TO BEGIN MXC SCREEN TEST COMPLETED TEST SCRN - Press to test all screen segments. When this key is pressed, the MXC displays the "Begin" message to the left, then lights all the segments, turns them all off, displays the "Completed" message, and then returns to the original test screen. END - Press to exit the test mode and return to the Main Menu screen. 3.3.
INITIAL TRANSMITTER SET-UP UM344-2 3.3.3 Loop Testing Testing the loop involves making sure that the Transmitter is sending out the proper current signal and that the other elements in the loop are receiving this signal. The Loop Override mode is used to test the loop. LOOP OVERRIDE SETS TRANSMITTER OUTPUT TO ENTERED VALUE END CONT WARNING! SELF TEST MAY BUMP TRANSMITTER OUTPUT ABORT CONT LOOP OVERRIDE - CHOOSE CURRENT OUTPUT LEVEL 4 MA 20 MA OTHR END 1. At the On-Line Menu, press LOOP OVRD.
UM344-2 INITIAL TRANSMITTER SET-UP 1) At the On-Line Menu, press CONFIG to access the function blocks. Continue through the menu sequence until reaching the Function Block Menu. 2) Check the information in the eight function blocks listed below. Edit values as needed while reviewing. 3. Archive the revised configuration in the MXC 4. Download the configuration to the Transmitter.
INITIAL TRANSMITTER SET-UP UM344-2 SP TRACK & HOLD Tracking Setpoint PUSP A/M TRANSFER Power-Up Mode Automatic Only Power-Up Valve CONTROLLER BLOCK Controller ON/OFF Controller Type Action Prop. Gain Time-Integral Time-Derivative Derivative Gain Manual Reset Manual Reset Track * 3.5 CHECKING TRANSMITTER OUTPUT For more detailed information on these function blocks, refer to Section 5 and Appendix A.
UM344-2 INITIAL TRANSMITTER SET-UP P - Process Variable 4. Check these Transmitter Variables to ensure the readings are correct. 5. Press END (F4) to return to the main menu.
UM344-2 INSTALLATION 4.0 INSTALLATION This Section describes installation of a Model 344 Temperature Transmitter. Topics include: receipt of shipment, installation considerations, and mechanical and electrical installation. IMPORTANT The installation must conform to the National Electrical Code and all other applicable construction and electrical codes. Refer to the installation drawings in Appendix B when locating a Transmitter in a hazardous area. 4.1 EQUIPMENT DELIVERY AND HANDLING 4.1.
INSTALLATION UM344-2 4.2 ENVIRONMENTAL CONSIDERATIONS Many industrial processes create severe environmental conditions. The conditions at each transmitter location must be within the specifications stated in Section 8.3.5. The Transmitter is designed to perform in harsh conditions, however, it is prudent to locate a Transmitter to minimize the effects of heat, vibration, shock, and electrical interference.
UM344-2 INSTALLATION Ÿ Determine conduit routing. Refer to Section 4.4.5. Ÿ Prepare installation site drawings showing the following: Ÿ Location of the Master Device (e.g. MXC or controller) Ÿ Location and identification of each Transmitter Ÿ Routing plan of signal cable(s) Ÿ Location of any signal cable junctions for connecting the MXC 4.3.2 Electrical Ÿ Determine Transmitter operating mode (analog or digital) and type of Network needed; refer to Section 4.3.3.
INSTALLATION UM344-2 4.3.3.1 Analog Mode Ÿ The Transmitter outputs a 4-20 mA signal for input to devices such as controllers and recorders. Ÿ Analog operation employs a Point-To-Point Network comprising a Transmitter, Primary/Secondary Master, and other non-signaling devices. Transmitter short address is 0 (zero). Ÿ Use the optional Digital Meter for local indication of transmitter output. Ÿ The Transmitter is factory configured for analog mode unless otherwise ordered.
UM344-2 INSTALLATION Network for Non-Hazardous Locations 250 See Note 2 See Note 3 Network Junction MXC See Note 6 Controller, + Recorder, or Other 1-5 Vdc Device; See Note 1 _ System Power Supply + _ Signal See Note 5 Test _ + _ + See Note 4 Model 344 Terminals See Note 3 MXC 250 See Note 2 Controller, Recorder, or Other 1-5 Vdc Device; Note 1 + System Power Supply + Non-Hazardous Location Hazardous Location See Note 6 See Note 5 _ _ Signal Test Supply and Return Barriers Shown Abo
INSTALLATION UM344-2 FIGURE 4-1 Point-To-Point Network (Analog Mode) See Note 2 MXC Model 352 Rear Terminals See Note 4 250 See Note 1 Non-Hazardous Location Hazardous Location See Note 6 A4 See Note 5 A5 B5 AG See Note 3 Supply and Return Barriers Shown Above Signal _ + Test _ + Model 344 Terminals Notes: 1. Network resistance equals the sum of the barrier resistances and the current sense resistor. Minimum value 250 Ohms; maximum value 1100 Ohms. 2.
UM344-2 INSTALLATION See Note 4 MXC 250 See Note 2 Network Primary Master, See Note 1 + System Power Supply + _ Non-Hazardous Location Hazardous Location _ Supply and Return Barriers Shown Above See Note 5 See Notes 3 and 6 Signal Test + _ + _ Model 344 Terminal Signal + _ Test + _ Model 344 Terminal Signal + _ Test + _ Model 344 Terminal Notes: 1. The System Power Supply is shown separate from the host input device. In practice, it may be part of the host input device.
INSTALLATION UM344-2 4.3.4 Power Supply Requirements A power supply is needed to power the Transmitter(s). The power supply can be: Ÿ A separate stand-alone supply capable of powering several Transmitters. It can be mounted in a control room or in the field. Follow the power supply manufacturer's recommendations with regard to mounting and environmental considerations.
UM344-2 INSTALLATION 4.3.4.1 Point-To-Point Network Figure 4-4 defines an analog mode Transmitter's operating region for the allowable ranges of supply voltage and network resistance. Perform the following simple calculations to ensure that the power supply output voltage permits the Transmitter to remain within the indicated operating range. 1. Calculate the minimum power supply output voltage.
INSTALLATION UM344-2 Power supply output voltage must be less than the calculated value. The maximum voltage across the input terminals of a Transmitter should never exceed 42 volts. The maximum number of Transmitters that can be connected to a Multi-Drop Network is fifteen. Each Transmitter is "parked" in a low current draw mode (4 mA) to conserve power. Ensure that the network power supply is capable of sourcing the total current consumed by the number of transmitters on the Network. 4.3.
UM344-2 C: Cf: INSTALLATION Cable capacitance per unit length between one conductor and the other conductor connected to the shield. C may be in pF/ft or pF/meter. Total input terminal capacitance of Field Instruments; the Primary Master is excluded. Cf is given by the following formula: Cf = (sum of all Cn values) x (5000) Where Cn is an integer (e.g., 1, 2, 3) corresponding to the input terminal capacitance of a Field Instrument. Cn values are read from the following table.
INSTALLATION Ÿ UM344-2 A Junction should be a simple electrical series connection containing NO repeaters or other devices (active or passive) that can degrade HART communications. 4.3.7 Safety Barriers Installed safety barriers must comply with the following: Ÿ Locate intrinsic safety barriers between the system power supply (e.g., Primary Master, if used) residing in the non-hazardous area and the transmitter(s) in the hazardous area. Ÿ Combined or separate supply and return barriers may be used.
UM344-2 Ÿ INSTALLATION Individual miscellaneous hardware must meet the following requirements: Ÿ Capacitance to Ground ................ 50 pF maximum Ÿ Resistance to Ground ................. 1 MΩ minimum Ÿ Impedance if Series Connected ................ Less than 10Ω Ÿ Impedance if Parallel Connected .................. Greater than 50kΩ. Ÿ The maximum number of miscellaneous devices per Network is 16. The combined electrical characteristics may not exceed the following: Ÿ Maximum capacitance to ground .
INSTALLATION UM344-2 B. RTD/Ohm Sensor-to-Transmitter Extension Cable The Transmitter will compensate for the effect of lead wire resistance for 3 and 4-wire RTD's and for an Ohm (potentiometer) sensor when a 3-wire input connection is used. Input connections may be made with copper wire. 1) Cable Recommendation for RTD: Multi-conductor high temperature cable, overall braid shield with three copper TFE insulated conductors and TFE wrapped jacket. Wire size should be 24 to 16 (AWG).
UM344-2 INSTALLATION resistance change of RTD per 1°C Total length (L) = resistivity of #24 AWG per foot 0.39 ohms L= = 14.8 feet or 7.4 feet for each lead. 0.0262 ohms per foot A 0.3° offset error is caused by an extension lead wire (#24) length of 2.23 feet. As the calculations indicate, extension lead wire added to a 2-wire RTD can cause serious offset error. A 2-wire RTD should not be used without determining that the results are acceptable.
INSTALLATION b) Ÿ UM344-2 The cable shield(s) may be grounded at a Network Junction Box or Wiring Panel provided that the cable shields are connected to either a terminal or the Box or Panel frame, and the terminal or frame is grounded. The power supply (+) and (-) connections must be floated and the cable shield at the transmitter must not be connected. Multi-Drop Network If the Primary Master's power supply output is isolated from ground, the Network may be floated.
UM344-2 INSTALLATION 1) Refer to Figure 4-5 and align four mounting holes in the base of the enclosure with the four 0.281inch diameter holes in the Bracket. Note that the transmitter can be mounted to the Bracket in four possible positions (90° apart) to the Bracket. 2) Using supplied 1/4-20 x 1/2 bolts, mount the transmitter to the bracket.
INSTALLATION UM344-2 5.90 (149.9) 4.44 (112.8) 3.80(96.5) 4.04(102.6) .034(8.6) Diameter 2.81 (71.4) 0.72(18.3) 2.81 (71.4) 0.61(15.
UM344-2 INSTALLATION Pipe Mounting Horizontal 4.82(122.4) 5.06(128.5) Vertical OR 4.30 (109.
INSTALLATION UM344-2 FIGURE 4-6 Model 344 Mounting Configurations with Supplied Bracket 4-20 September 1995
UM344-2 INSTALLATION 2. Bracket to Pipe Mounting 1) At the selected location on the pipe, place the pipe-groove side of the mounting bracket against the pipe. See Figure 4-6. 2) Slip the supplied U-bolt around the pipe and through one of the two pairs of mounting holes in the pipe-groove face plate of the bracket. 3) Place a supplied washer and hex nut on each end of the U-bolt and hand tighten the nuts.
INSTALLATION UM344-2 4.4.3 Direct Mounting to Process The Transmitter can be mounted directly to the point of measurement and supported by the thermowell, extension fittings, and probe assembly. IMPORTANT It is recommended that high temperature anti-seize compound be applied to the threads of thermowells, extension nipples, union connectors, and sensor assemblies. Refer to Figures 4-7 and 4-8 and the following for mounting guidance: 1. Unscrew the thermowell from the Sensor Assembly.
UM344-2 INSTALLATION Wall of Pipe or Process Vessel Thermowell Hex Sensor Hex Union Conduit for 2-Wire Loop Wiring Thermowell Extension Nipple Model 344 Transmitter Insulation (If Required) WITHOUT DRAIN SEAL Wall of Pipe or Process Vessel Thermowell Hex Sensor Hex X02818S0 Close Nipple Union Coupling Elbow Thermowell Model 344 Transmitter Extension Nipple Insulation (If Required) Conduit Terminal Compartment Side Conduit for Wiring Elbow Drain Seal WITH DRAIN SEAL FIGURE 4-7 Transmitte
INSTALLATION UM344-2 Thermowell Sensor Probe Sheath RTD or Thermocouple Sensor Element Extension Assembly 1/2 NPT Nipple (Screws into Transmitter Conduit Inlet) Thermowell Hex Extension Nipple 1/2 NPT Thread Sensor Element Extension Wires Union Probe Hex Probe Junction See Notes Sensor Probe Sheath: Stainless Steel or Inconel X02828S0 Exposed Junction Ungrounded Junction Grounded Junction Notes: 1. Three styles of thermocouple probe junctions are shown. 2.
UM344-2 INSTALLATION 4.4.4 Local Digital Meter Installation, Repositioning and Removal Three procedures are provided in this section. Refer to Figures 4-9 and 4-10 as necessary. IMPORTANT Follow proper electronic circuit board handling procedures to avoid damage to the semiconductors by electrostatic discharge. • • • Two procedures describe repositioning of an installed meter: A is for rotating the meter 180°, and B is for rotating the meter 90° clockwise or counterclockwise (actually ±78°).
INSTALLATION UM344-2 3. At the Electronics Module, remove the meter mounting bracket attached to the left corner of bottom circuit board . Install bracket in right front corner of that circuit board.
UM344-2 INSTALLATION Meter Mounting Screw, qty. 2 o Factory Meter Orientation 0 Shown with Enclosure Cap Removed o Meter Repositioned 180 Digital LCD Meter Cable connectors J1 to J4 wired in parallel Disconnect Cable Cable guide slot (4 places) Notes: 1. Meter can be rotated clockwise or counterclockwise o o o either 90o (actually, 78 and 282 respectively) or 180 . o Meter Repositioned 90 CCW 2. Remove Enclosure Cap for access to Meter. 3.
INSTALLATION UM344-2 3. Determine desired meter orientation and perform either procedure A or B. Note the following when installing and positioning the short ribbon cable and when applying power to the transmitter. NOTE Pin 1 end of cable connector is identified by dark Red or Blue striped cable conductor. Pin 1 of Board “J” connector is identified by the “1” printed next to one corner of the connector.
UM344-2 INSTALLATION Plug unused entrance Conduit for field wiring (DC power) Drain Seal Conduit Drain Installation For explosion proof installation use conduit seal, Crouse-Hinds type EYS or equivalent, on wiring outlet.
INSTALLATION UM344-2 Ÿ Thermocouple wire must be handled with great care when being installed in conduit. Decalibration of the wire can result by cold-working the metal conductor, an effect that can occur when the wire is drawn through a conduit or damaged by rough handling or vibration. 4.4.5.2 Cables Ÿ Mark or tag each signal cable conductor as either SIGNAL (+) or SIGNAL (-) to ensure correct connection at the Transmitter.
UM344-2 INSTALLATION 4.5 ELECTRICAL INSTALLATION This section describes loop wiring for Point-To-Point and Multi-Drop Networks. Refer also to Section 4.6 for installations in hazardous locations. Figure 4-12 shows signal and sensor termination terminal strips in the Transmitter’s enclosure. The following should already have been completed: Ÿ Selection of either analog or digital operating mode and corresponding Point-To-Point or Multi-Drop Network; Section 4.3.3.
INSTALLATION UM344-2 MXC Connections Test (+) Terminal Test (-) Terminal Ground Screw Signal (+) Terminal SIGNAL TEST + - Notes: 1. Viewed with enclosure cap removed. 2. MXC = Moore XTC Communicator. Signal (-) Terminal Sensor Terminals for Thermocouple, RTD, Ohms,or mV Input X02869S1 FIGURE 4-12 Signal (Loop) , Sensor, MXC and Test Terminals 4. Connect the loop cable to the SIGNAL (+) and (-) terminals inside the Transmitter's enclosure.
UM344-2 INSTALLATION Signal Cable Signal Cable Note 2 Note 2 Note 1 RTD+ RTD+ RTDNote 2 No connection RTD- RTDI RTDNote 2 RTD+ No connection RTD- B. 3-Wire RTD Signal cable TCNote 2 OHM+ OHM+ Jumper D. Thermocouple RTDNote 2 RTD+ No connection RTDNo connection RTDI C. 4-Wire RTD Signal cable Note 2 No connection TC- RTD+ Signal cable Note 2 TC+ Note 2 RTDI RTD+ A.
INSTALLATION UM344-2 Standard ANSI color coding is used on insulated thermocouple or extension grade wire when the insulation permits. Some insulations will use a colored tracer to indicate the lead polarity. Refer to Table 4.2 for color code information and bare wire characteristics for identifying non-color coded wires. When connecting solid thermocouple extension wire, wire insulation should butt against the head of the screw. The conductor should not be visible. TABLE 4.
UM344-2 INSTALLATION 7. If one of the two electrical conduit entrances in the housing is not used, it should be plugged. Refer to the Transmitter's nameplate and Section 8.1 to determine whether entrance holes accept ½-14 NPT or M20 x 1.5 fittings. Seal ½ NPT fittings with TFE/PTFE tape; seal M20 fittings with a soft setting sealing compound rated for at least 105°C (221°F). 4.6 HAZARDOUS AREA INSTALLATION Drawings showing Transmitter installation data for hazardous areas are located in Appendix B.
INSTALLATION 4-36 UM344-2 September 1995
UM344-2 ON-LINE AND OFF-LINE OPERATION 5.0 ON-LINE AND OFF-LINE OPERATION On-line operation is any configuration or monitoring activity which involves direct communication with a transmitter. When the controller function block is disabled, the local pushbuttons may be used to configure range and damping.
ON-LINE AND OFF-LINE OPERATION Dev ID: 210300003C Tag: TTC-101 ADD: 00 LOOP OVRD CAL/ CON TEST FIG END CONFIGURATION MODE EDIT ARCH EDIT CONF TEMP XMTR MODEL 344 END UM344-2 1. Establish communication with a transmitter; see Section 3.2. The On-Line Menu shown adjacent should be displayed. 2. Press CONFIG (F3) at the On-Line Menu screen to enter the configuration mode and display the Configuration Mode screen (adjacent).
UM344-2 ON-LINE AND OFF-LINE OPERATION NOTE Function blocks are in an easy to use format with configuration parameters grouped by like function. Those supported are Sensor Input, Operator Display, Transmitter ID, Output Block, Alarm Block, SP Track & Hold, A/M Transfer and Controller Block. Each is shown in Appendix A. 7. Press SELECT (F4) to view or edit a function block’s parameters. Pressing END (F3) will end configuration (see step 4 above).
ON-LINE AND OFF-LINE OPERATION UM344-2 8. The Range screen shows the unit of measurement and the lower and upper range values (LRV and URV) currently configured. Set the transmitter's temperature range corresponding to 4 and 20 mA. (See Section 8 for transmitter input ranges.) These values can be changed using either of two methods: "Tell" or "Show." Values for URV and LRV entered in the following procedures are stored in the MXC. Complete configuration and perform the download steps in Section 5.1.
UM344-2 ON-LINE AND OFF-LINE OPERATION Press ENTER to store the new value in the on-line alterable memory and return to the Range screen. Pressing QUIT displays the Range screen without saving a new value. DAMPING : 1.0000 SEC SEL/ END EDIT SEL/ CONT DAMPING : SEC ENTER DAMPING VALUE EN< QUIT TER BURNOUT DIRECTION: UPSCALE LAST OPTN NEXT OPTN SEL/ END SEL/ CONT NOTE To conserve battery power, the MXC should not be left in the Sensor Input mode. 9.
ON-LINE AND OFF-LINE OPERATION AUTO RERANGE: DISABLE LAST NEXT SEL/ OPTN OPTN END UM344-2 4. Set Auto Rerange to enable or disable using the LAST OPTN and NEXT OPTN keys. SEL/ CONT LOCAL DISPLAY CODE: PROCESS VARIABLE LAST NEXT SEL/ SEL/ OPTN OPTN END CONT Press SEL/CONT to continue. Pressing SEL/END will end configuration of this block. 5. Scroll through the Local Display Code using the LAST OPTN and NEXT OPTN keys to view the following three choices: MEASURED VARIABLE, PERCENT, or PROCESS VARIABLE.
UM344-2 ON-LINE AND OFF-LINE OPERATION NOTE Only numbers may be used in the serial number field. SHORT ADDRESS 00 SEL/ END EDIT SEL/ CONT SHORT ADDRESS 00 ENTER ADDRESS < QUIT ENTER Press SEL/CONT to display the Short Address screen. Pressing SEL/END will end configuration of the transmitter ID Block. 6. Enter or edit the transmitter short address using the EDIT, QUIT, and ENTER keys as described below. EDIT - display the Short Address edit screen.
ON-LINE AND OFF-LINE OPERATION UM344-2 4. Press EDIT (F1) to edit the setpoint value. Press ENTER (F4) to change the setpoint value. Press QUIT (F3) to exit without changing the setpoint.
UM344-2 ON-LINE AND OFF-LINE OPERATION 5. Press SEL/CONT (F4) to configure the alarm type. 6. Press NEXT OPTN (F2) to choose either HIGH or LOW. SELF CLEARING NAKS: ON LAST NEXT SEL/ SEL/ OPTN OPTN END CONT 8. At the SELF CLEARING NAKS screen press NEXT OPTN (F2) to choose ON or OFF. ALARMS OUT OF SERVICE: OFF LAST OPTN NEXT OPTN SEL/ END SEL/ CONT 5.1.1.6 Setpoint Track and Hold Block TRACKING SETPOINT: NO LAST OPTN NEXT OPTN SEL/ END SEL/ END SEL/ CONT 2.
ON-LINE AND OFF-LINE OPERATION POWER-UP VALVE: 0.000% SEL/ END EDIT SEL/ CONT 5.1.1.8 Controller Block NEXT OPTN SEL/ END SEL/ CONT CONTROLLER TYPE: PID LAST OPTN NEXT OPTN SEL/ END SEL/ CONT ACTION: REVERSE LAST OPTN NEXT OPTN SEL/ END SEL/ CONT PROPORTIONAL GAIN: 1.0000 SEL/ END EDIT SEL/ CONT MANUAL RESET TRACK: NO LAST OPTN NEXT OPTN SEL/ END 3. Press EDIT (F1) to edit the Power-Up Valve setting.
UM344-2 ON-LINE AND OFF-LINE OPERATION As described in the previous sections, there is a Function Block Menu in configuration mode from which basic function blocks can be accessed. Also in the previous sections, it was explained how to get back to this screen when making changes to a function block.
ON-LINE AND OFF-LINE OPERATION CONFIGURATION COMPLETE REQUIT SAVE VIEW DOWN LOAD Dev ID: 210300003C Tag: TTC-101 ADD: 00 LOOP OVRD CAL/ CON TEST FIG END SAVE TO ARCHIVE 92 TTC-101 NEW YES ARCH END UM344-2 1. Choose END at the Function Block Menu in configuration mode to display the Configuration Complete Menu. It shows these selections: QUIT, SAVE, REVIEW, or DOWNLOAD. Choose one after all configuration changes are entered.
UM344-2 Ÿ ON-LINE AND OFF-LINE OPERATION If the configuration has been edited, the MXC will display the adjacent warning that the transmitter's configuration will be changed.
ON-LINE AND OFF-LINE OPERATION DOWNLOADING CONFIGURATION UM344-2 2. From the above Warning screen, press one of the following two keys: DOWNLOAD - start a download. The MXC will show the Download Wait screen and then the Download Complete screen. The new configuration is now stored in the transmitter. - PLEASE WAIT - DOWNLOAD COMPLETE 5.1.3 Local Transmitter Operation ABORT - return to the previous screen.
UM344-2 ON-LINE AND OFF-LINE OPERATION 5.1.3.1 Display Functions The numerals displayed on the Digital Meter represent the value of the PROCESS VARIABLE (PV) when the “PV” annunciator is lit; see Figure 5-1. The units associated with PV are chosen during transmitter configuration of the OPERATOR DISPLAY BLOCK. Refer to section 5.1.1.2. There are three OUTPUT DISPLAY CODE choices listed in Table 5.1 that describe what information is displayed and how it will be annunciated.
ON-LINE AND OFF-LINE OPERATION 5-16 UM344-2 September 1995
UM344-2 5.1.3.2 Local Pushbutton Input Ranging (Controller OFF) ON-LINE AND OFF-LINE OPERATION The low and high process temperatures selected as the 0% and 100% span points may be applied to the transmitter and stored in the EEPROM using the ZERO/FULLSCALE pushbuttons. This procedure assumes the transmitter is field mounted to an operating process.
ON-LINE AND OFF-LINE OPERATION too small, in which case no new ZERO or FULLSCALE value is stored). UM344-2 3. Change FULLSCALE range value: 1) Supply FULLSCALE value. If the process variable currently being reported by the Transmitter is not the desired FULLSCALE value, then the process must be manipulated by an operator to arrive at the desired value. 2) Activate the Pushbutton Mode Press and hold for 5 seconds or more the FULLSCALE pushbutton, then release the pushbutton.
UM344-2 5.1.3.3 Local Pushbutton Damping Adjustment (Controller OFF) ON-LINE AND OFF-LINE OPERATION Adjusting the damping changes the value of the digital filter’s time constant. An installed Digital Meter is recommended for this procedure so that the damping values may be monitored. 1. Activate the Pushbutton Damping Mode. Simultaneously press and hold, for 5 seconds or more, the FULLSCALE and ZERO pushbuttons, then release both pushbuttons. Note the following.
ON-LINE AND OFF-LINE OPERATION UM344-2 7. Refer to step 2 above and select the new damping value. Count the number of steps (damping values) from “0” seconds to the selected value. This number “N” will be used in the following step 8. 8. Press and release the FULLSCALE pushbutton “N” times to step to the selected damping value. 9. Perform steps 3 and 4 above. 5.1.3.
UM344-2 ON-LINE AND OFF-LINE OPERATION B. Change SET POINT 1. The Controller must be in the AUTO control mode to change the SET POINT; if not, place the Controller in the AUTO control mode. 2. Press and hold, for a minimum of 5 seconds, the ZERO pushbutton, then release the button. The "SP" and "PB" annunciators shall be lit and the "PV" annunciator shall be extinguished. The displayed number is the active SET POINT value. 3. Select new SET POINT. Note the following.
ON-LINE AND OFF-LINE OPERATION UM344-2 1. The Controller must be in the MANUAL control mode to change the VALVE; if it is not, place the Controller in the MANUAL control mode.
UM344-2 ON-LINE AND OFF-LINE OPERATION 2. Press and hold, for a minimum of 5 seconds, the FULLSCALE pushbutton, then release the button. Note the following. • The "V", "%", and "PB" annunciators shall be lit and the "PV" annunciator shall be extinguished. • The displayed number is the VALVE position in percent (-1 to 110). • Interpreting a VALVE Open/Close position depends upon knowing if the FINAL CONTROL ELEMENT is configured as REVERSE or DIRECT acting.
ON-LINE AND OFF-LINE OPERATION 5.1.4 Quick Access Key Operation UM344-2 MXC Quick Access keys are used to view transmitter parameters while the MXC is on-line and communicating with a transmitter (refer to Section 2). Eight Quick Access keys are used with the Model 344: TRANS. VAR'S., TREND, ZOOM, and STATUS, are available with the controller ON or OFF. CHANGE SP, CHANGE VALVE, A/M and TUNE are only available when the controller is ON. Press a key to access live transmitter data.
UM344-2 ON-LINE AND OFF-LINE OPERATION 4) Press ENTER. The following are shown in the adjacent screen: Upper and Lower Range Values stored in the transmitter, the current transmitter reading and the thirteen sample trend. 400.00 105.24 F4=EXIT -20.005 5) Press either TREND or F4 to exit this screen. ZOOM - expands a portion of a selected variable's trend. Zoom is selected from the Trend screen. ENTER ZOOM VALUE < END ENTER 1) Press ZOOM to display the adjacent screen. Type a zoom value.
ON-LINE AND OFF-LINE OPERATION CHANGE SP - allows you to view and change the on-linesetpoint of the controller. S: 50.000% NEW SETPOINT: 0.0000 TO 100.00 < END UM344-2 ENTER 1) Enter new setpoint and press ENTER (F4) to store the value. 2) Press the “CHANGE SP” key again or END (F3) to exit. VALVE: 10.000% NEW VALVE: -1.000 TO 110.00 < END ENTER CHANGE VALVE - allows you to view and change the position of the valve in MANUAL. If the controller is in AUTO, the valve cannot be changed.
UM344-2 ON-LINE AND OFF-LINE OPERATION 5.2 OFF-LINE OPERATION Off-line operations include editing parameters in a transmitter configuration stored in an MXC archive for downloading at a later time to a transmitter. The first part of this section describes off-line configuration editing. The second part explains downloading a configuration to a transmitter. An archive is a transmitter configuration stored in the MXC. It resides in a specific location in the MXC's On-Line Memory.
ON-LINE AND OFF-LINE OPERATION SELECT X-MITTER TYPE TEMP CONTROLLER PREV NEXT END SELECT ARCHIVE 97 DEFAULT SELECT A FUNCTION EDIT ARCH END UM344-2 4. Use PREV and NEXT to select the transmitter type Temperature - then press SELECT. The default configuration for a temperature transmitter will be loaded into the Off-Line Memory of the MXC. 5. The next screen shows the archive number to be edited. Press either EDIT ARCH to begin editing or END to select another archive number. 6.
UM344-2 ON-LINE AND OFF-LINE OPERATION - 5.2.2 Using an Archive in OnLine Memory If the tagname is changed, press SEL/END or SEL/CONT to return to the original Save screen. Follow the prompts to save the configuration in the MXC. An archived configuration can be accessed using the MXC during On-Line operations through the configuration mode. CONFIGURATION MODE EDIT ARCH EDIT CONF 1. Press CONFIG at the On-Line menu screen to display: EDIT ARCH, EDIT CONF, and END. END 2.
ON-LINE AND OFF-LINE OPERATION UM344-2 resident in the transmitter simply respond to the prompt, continue or abort.
UM344-2 ON-LINE AND OFF-LINE OPERATION Ÿ A warning that the transmitter's configuration will change - respond to the prompt. Ÿ A warning if the archive has a different tagname than the transmitter - respond to the prompt. Press END to return to the previous screen.
ON-LINE AND OFF-LINE OPERATION 5-32 UM344-2 September 1995
UM344-2 CALIBRATION AND MAINTENANCE 6.0 CALIBRATION AND MAINTENANCE This section describes calibration, preventive maintenance, and troubleshooting The Maintenance section has preventive maintenance procedures that are employed to prevent conditions from occurring that would be detrimental to the reliability of the transmitter. Should a malfunction occur, troubleshooting procedures will assist in minimizing down-time.
CALIBRATION AND MAINTENANCE UM344-2 6.1.1 Equipment Required Ÿ Ÿ Ÿ Ÿ Ÿ Ÿ Ÿ Ÿ Ÿ Ÿ Moore XTC Communicator (MXC) - refer to Section 2 of this User's Manual Laboratory grade digital multimeter (DMM); for calibrating the 4 to 20 mA output signal Voltmeter Section ............. Accuracy +/-0.01% of reading Resolution 1.0 mV Input impedance 10 MΩ Ammeter Section .............. Accuracy +/-0.
UM344-2 CALIBRATION AND MAINTENANCE NOTE Removing a transmitter can interrupt power to other transmitters powered from a common power source. Note the effect this can have on process control and operation and, if necessary, follow the proper procedures to shut down the process. When disconnecting the SIGNAL leads, carefully insulate each lead as it is removed to prevent accidental electrical shorts. 2. Remove the enclosure cap for access to the terminal compartment 3.
CALIBRATION AND MAINTENANCE UM344-2 MXC 250 Bench Power Supply (DC) _ + Signal _ + 1 2 + _ Digital Milliammeter + _ Digital Milliammeter Test_ + 3 Model 344 Terminals X02807S1 Resistance Decade Box FIGURE 6-1 Bench Test Connections Circuit Junction MXC Controller, Recorder, Indicator, or other 1-5 Vdc Device System Power Supply + 250 _ _ Signal + + _ Test + _ X02808S1 1 2 3 Model 344 Terminals Sensor FIGURE 6-2 Field Calibration Connections 6-4 September 1995
UM344-2 CALIBRATION AND MAINTENANCE 12. Read the ammeter. If the output is within limits, press QUIT (F3) and proceed to step 13. If calibration is still required, repeat step 10 as many times as necessary until the output is within limits, then press QUIT and proceed to step 13. PRESSING ENTER WILL SET TRANSMITTER OUTPUT TO AEN20.00 MA BORT TER The MXC will display the adjacent screen: 13. Press ENTER (F4). The MXC will display the adjacent screen: ENTER OUTPUT CURRENT MA EN< QUIT TER 14.
CALIBRATION AND MAINTENANCE UM344-2 6.1.3 RTD/OHM Type Input Calibration The conversion accuracy of the temperature signal from RTD/Ohm type inputs, as indicated by transmitter output ZERO and FULL SCALE values, depends upon both CURRENT SOURCE and NARROW/WIDE MILLIVOLT calibration (section 6.1.4.2). The calibration check consists of substituting a resistance decade box for an RTD or Ohm (slidewire potentiometer) type sensor.
UM344-2 CALIBRATION AND MAINTENANCE Ohm input (wide range) ...... Equal to or less than +/-1.3 ohm of Zero and Full Scale ohmic values. Ohm input (narrow range) . Equal to or less than +/-0.45 ohm of Zero and Full Scale ohmic values. Equal to or less than +/-0.02% of selected span in ohms; the higher value will be the accuracy tolerance. 5. Set decade box to resistance corresponding to Full Scale value and check accuracy of indication against specifications listed in step 4.
CALIBRATION AND MAINTENANCE 6-8 UM344-2 September 1995
UM344-2 CALIBRATION AND MAINTENANCE MXC Bench Power Supply (DC) _ 250 + Signal Test _ _ + + X02827S1 1 of 2 1 Digital Microammeter + _ 2 3 Model 344 Terminals FIGURE 6-3 RTD/Ohm Current Source Calibration Set Up 3. Read and note, to three decimal places, the value of the forcing current as displayed by the digital microammeter. 4. In response to the screen prompt, enter the noted current (in microamps) into the MXC. For example: 51.125 µA. 5. Press ENTER (F4).
CALIBRATION AND MAINTENANCE UM344-2 2) Disconnect the test resistance decade box and connect the test millivolt source to the transmitter. See Figure 6-4. 3) Turn ON the power supply and proceed to section 6.1.4.2 and perform the Narrow/Wide Millivolt calibration procedures. 6.1.4 Thermocouple/Millivolt Type Input Calibration The calibration check consists of substituting a millivolt source for a thermocouple (TC) or mV (slidewire potentiometer) type sensor.
UM344-2 CALIBRATION AND MAINTENANCE 2. Determine millivolt values for thermocouple or mV input. • • Thermocouple Type Input: Consult user supplied TC millivolt vs temperature table and record the millivolt values corresponding to the Zero and Full Scale temperatures. mV Type Input: Consult user supplied data and record the millivolts equivalent to the Zero and Full Scale points. 3. Set millivolt source to voltage corresponding to Zero Scale value.
CALIBRATION AND MAINTENANCE UM344-2 If accuracy is within specifications, calibration is not required. Disconnect test equipment, re-connect all wires and install enclosure cap. 6.1.4.2 Narrow/Wide Millivolt Calibration Calibration equipment connections are as shown in Figure 6-4. A. NARROW MILLIVOLT CALIBRATION 1. From the MXC, execute the FIND XMTR program then select CAL/TEST (F2) from the display menu. 2.
UM344-2 CALIBRATION AND MAINTENANCE The MXC's screen will display: 3. Adjust the output of the millivolt source to 103.000 mV. September 1995 APPLY 103.
CALIBRATION AND MAINTENANCE 4. Press CONT (F4). Screen will display: UM344-2 APPLY -18.000 mV TO mV+ (1) TO AND mV- (3) WITH COPPER WIRE 5. Adjust the output of the millivolt source to -18.000 mV. 6. Press CONT (F4). Screen will display: 7. Press CONT (F4) to calibrate. CONT WARNING: BURNING EPROM WILL CHANGE CALIBRATION CHARACTERISTICS ABRT CONT Press ABRT (F3) to quit without changing calibration. 8. Wide Millivolt calibration is completed.
UM344-2 CALIBRATION AND MAINTENANCE 6.2.2 Transmitter Exterior Inspection The frequency of inspection will depend on the severity of the transmitter's environment. 1. Inspect the exterior of the transmitter enclosure for accumulated oil, dust, dirt, and especially any corrosive process overspray. 2. Check that each enclosure cap is fully threaded onto the enclosure, compressing the O-ring between the cap and the enclosure. The O-ring must not be cracked, broken, or otherwise damaged. 3.
CALIBRATION AND MAINTENANCE UM344-2 Check that all wire connections are tight. Enclosure threads must be coated with a wet, paste-type, anti-seize compound such as Never-Seez by Emhart Bostik. Inspect the enclosure O-ring for damage. It is not recommended that the enclosure’s electronics module compartment be opened for inspection. 6.2.5 Transmitter Calibration An annual calibration check should be performed to ensure that the transmitter is within specifications. Refer to Section 6.1 for details. 6.
UM344-2 CALIBRATION AND MAINTENANCE MXC STATUS and Diagnostic Displays require fault-free HART communications between the MXC and the transmitter. In the event of communication problems, the MXC can display communication error messages. Refer to Section 6.3.2.1, paragraph B for details. B. Optional Digital Meter The Model 344 routinely performs self-diagnostic tests and will display the message “FAIL” if a fault is detected.
CALIBRATION AND MAINTENANCE UM344-2 Transmitter LCD FAIL MXC 1. If not already in communication with the suspect transmitter, establish communications by executing the "FIND XMTR" routine on the MXC as described in Section 3.2. 2. Press the MXC's STATUS key. If the message "FAILSAFE" appears in the display, the transmitter has failed a self-diagnostic test. 3. Press ERRORS (F2) to display all active transmitter errors. Note which of the error messages in Table 6.
UM344-2 CALIBRATION AND MAINTENANCE Repeat the "TEST" program to ensure the validity of the reported fault. Press END (F4) to exit the CALIBRATE/TEST program. Go to step 5. Fault Does Not Reappear: If the fault was temporary - possibly caused by excessive electrical noise or a power line spike the adjacent message will be displayed: If the transmitter passes the selftest, it will automatically exit the failsafe mode and resume operation. 5. If a fault exists, on the MXC, press STATUS then ERRORS (F2).
CALIBRATION AND MAINTENANCE POSSIBLE CAUSE Loop Wiring Failure UM344-2 CORRECTIVE ACTION Check for 12 Vdc minimum across SIGNAL +/- terminals in transmitter terminal compartment. Check polarity of loop wiring at both power supply and transmitter. Check that loop resistance is between 250Ω and 1100Ω. Check for loose or broken loop wiring at power supply terminals, Supply Barriers (if used), junction boxes, and transmitter terminal compartment. Check for disconnected or broken Current Sense Resistor.
UM344-2 CALIBRATION AND MAINTENANCE TABLE 6.2 Message - No Transmitter Found, Continued Possible Cause: Loop Power Supply Failure Check power supply output voltage for installed network resistance: 17 Vdc minimum at 250Ω 42 Vdc maximum at 1100Ω Check power supply for blown fuse or tripped circuit breaker Replace Electronics Module. Refer to Section 6.5.2. Possible Cause: Transmitter Electronics Module Failure TABLE 6.
CALIBRATION AND MAINTENANCE UM344-2 TABLE 6.4 Message - Field Device Malfunction This message results when, after having successfully established communications with a transmitter, a transmitter self-diagnostics failsafe flag is detected in a received message. Use the MXC STATUS program to identify the error source. POSSIBLE CAUSE Transmitter Failed Self-Diagnostic Test CORRECTIVE ACTION Press the STATUS key on the MXC. Confirm that the message "FAILSAFE" appears in the upper right corner of the display.
UM344-2 CALIBRATION AND MAINTENANCE TABLE 6.5 Symptom - Zero or Low Output, Continued Loop Wiring/Power Supply Check for 12 Vdc minimum across SIGNAL +/- terminals in transmitter terminal compartment. Check power supply output voltage for specified level: 17 Vdc minimum, 42 Vdc maximum. Check power supply for blown fuse or tripped circuit breaker. Check polarity of loop wiring. Check that loop resistance is between 250Ω and 1100Ω.
CALIBRATION AND MAINTENANCE UM344-2 TABLE 6.7 Symptom - Output Current Fixed Below Scale at Approximately 3.84 mA POSSIBLE CAUSE Loop supply voltage less than 12 Vdc at transmitter SIGNAL +/- terminals. Thermocouple Burnout (if Downscale protection) or thermocouple extension wire(s) open. Thermocouple wires have polarity reversed. Shorted thermocouple extension wires (due to insulation failure) between remote mounted thermocouple and transmitter.
UM344-2 CALIBRATION AND MAINTENANCE TABLE 6.9 Symptom - Erratic Output POSSIBLE CAUSE Loop Wiring CORRECTIVE ACTION Check for 12 Vdc minimum across SIGNAL +/- terminals in transmitter terminal compartment. Check power supply output voltage: 17 Vdc minimum; 42 Vdc maximum. Check for loose loop wiring at power supply terminals, Supply Barriers (if used), junction boxes, and transmitter terminal compartment. Check for loose leads at Current Sense Resistor.
CALIBRATION AND MAINTENANCE UM344-2 1. Turn off power to the transmitter and remove protective enclosure cap to access the LCD. 2. Snap a grounding wrist strap on wrist and connect ground clip to transmitter or mounting bracket. 3. As shown in Figure 4-10, disconnect cable from Digital Meter Board and slide cable from cable slot in Board. 4. Connect the cable to the spare LCD. Restore power to the transmitter and check that the spare LCD is functioning correctly.
UM344-2 CALIBRATION AND MAINTENANCE 6.5 ASSEMBLY REMOVAL AND REPLACEMENT This section provides general information concerning the replacing of assemblies. Removal and replacement of assemblies is easily accomplished with standard hand tools. Section 4.4.4 describes repositioning and removal of the digital meter. This procedure is also used for meter replacement. NOTE If the transmitter (Controller version) is controlling a process, use the proper procedures and shut down the process. 6.5.
CALIBRATION AND MAINTENANCE • • UM344-2 The Electronics Module’s guide blocks engage the guide posts The P1 power connector (at rear of Module) engages the mating connector on the Baseboard. 4. Secure the Electronic Modules’s retaining bracket to the stand-off. 5. If applicable, refer to section 4.4.4 and install removed digital meter. 6.
UM344-2 CALIBRATION AND MAINTENANCE 1. Part number from Parts List or from a label on assembly 2. The single number software compatibility code 3. Serial number from the label on the transmitter's nameplate 4. User purchase order number of original order, available from user records 5. New user purchase order number for the assembly to be replaced or spared 6. Reason for return for repair; include system failure symptoms, station failure symptoms, and error codes displayed.
CALIBRATION AND MAINTENANCE UM344-2 When someone calls for support for the first time, a personal caller number is assigned. This number is mailed in the form of a caller card. Having the number available when calling for support will allow the TIC representative taking the call to use the central customer database to quickly identify the caller’s location and past support needs. • Product part number or model number and version (see section 7.
UM344-2 September 1995 CALIBRATION AND MAINTENANCE 6-31
UM344-2 CIRCUIT DESCRIPTION 7.0 CIRCUIT DESCRIPTION This section provides a basic circuit description of the XTC Model 344 Temperature TransmitterController. Figure 7-1 shows a functional block diagram of the transmitter. The main Electronics Assembly is comprised a four circuit boards: Digital Board with microprocessor and HART modem chips, Analog Board with the Digital/Analog converter and power supply, an Input Board, and an Output Board.
CIRCUIT DESCRIPTION UM344-2 Input Circuitry RTDI+ Upscale/ Downscale Burnout 104 uA Source P-Channel FET Switch V Burnout Trickle Current RTD TC RTD SEL TC+ 52 uA Sink TC-/RTD- CMOS Analog Switch AMP 2-Pole Filter Input 1 A to D Converter AMP 12-42 Vdc Loop Power Supply Input Isolated Power Supply Data Control Input 2 SCLK Reference Junction Temperature Sensor Data/Control Isolation Output Circuitry Digital Signal Pulse On SIGNAL+ V to I Converter Pulse Off SIGNAL- Analog Meter
UM344-2 CIRCUIT DESCRIPTION 7.2 THEORY OF OPERATION The transmitter input signal, obtained from a Thermocouple (TC), Millivolt (mV), Resistance Temperature Detector (RTD) , or Resistive (Ohm) source is wired to the transmitter’s signal input terminal block. The standard calibration curves for J, K, E, T, R, S, B and N type Thermocouples and US/DIN curves for 100, 200, and 500 Platinum RTDs are stored in memory.
CIRCUIT DESCRIPTION UM344-2 Analog Switch is turned on enabling the 52 µA sink circuit.
UM344-2 CIRCUIT DESCRIPTION The current from the 104 microamp source is applied to the RTDI(+) pin which is jumpered to the TC(+) pin. Since the 52 µA sink network draws 52 microamps, the remaining current flows through the RTD input to ground creating a voltage at the input to the 2-pole filter.
UM344-2 MODEL DESIGNATION AND SPECIFICATIONS 8.0 MODEL DESIGNATION AND SPECIFICATIONS This section contains the model designation table, accessory tables, and specifications for all Model 344 Temperature Transmitters. 8.1 MODEL DESIGNATION Table 8.1 identifies each model designation entry on a transmitter's nameplate.
MODEL DESIGNATION AND SPECIFICATIONS UM344-2 (2) Not available with FM/CSA Units. (3) Tags - The permanent transmitter nameplate can be stamped with a tagname of up to 8 characters. Optional, wired-on SS tags are also available. (4) Refer to SD344 for details. 8.2 ACCESSORIES Table 8.2 lists the general accessories available for the transmitter. Accessories are ordered separately since they are not included in a transmitter’s model number. Table 8.
UM344-2 MODEL DESIGNATION AND SPECIFICATIONS ** Refer to corresponding GC344T_ or PI34-3 for ordering information.
MODEL DESIGNATION AND SPECIFICATIONS 9.00 (22.9) UM344-2 2.00 (5.10) 6.00 (15.2) See Note Thermocouple Thermowell Assembly 9.00 (22.9) A 6.00 (15.2) F 2.00 (5.10) U See Note 3-Wire RTD Thermowell Assembly X02815S0 Note: Typical Well Lengths in Inches (Centimeters). 3.50(8.9) 6.00(15.2) 8.00(20.3) 10.00(25.4) 12.00(30.5) FIGURE 8-1 Typical TC and RTD Thermowell Assemblies without Heads A 6.00 (15.2) F 2.00 (5.10) U See Note Note: Typical Well Lengths in Inches (Centimeters). X02816S0 3.50(8.
UM344-2 MODEL DESIGNATION AND SPECIFICATIONS Table 8.4 provides a list of replacement thermocouples and RTDs for Model 344T series thermal sensors. In critcal applications, it may be desirable to have on-hand spare elements. All thermal elements are 1/4” in diameter with a 316SS sheath and grounded measuring junction. All thermal elements are spring loaded. The length of the assembly, computed as A + F + U, must be supplied.
MODEL DESIGNATION AND SPECIFICATIONS UM344-2 8.3 SPECIFICATIONS The following specifications are for all transmitter models except as noted. 8.3.1 Mechanical Transmitter Dimensions.................................................Figure 8-3 Mounting Bracket Dimensions, Supplied Bracket ............Figure 4-5 Weight (approximate) Transmitter with Display .........................................8.5 lbs (3.9 kg) Supplied Bracket.....................................................1.5 lbs (0.7 kg) 8.3.
UM344-2 MODEL DESIGNATION AND SPECIFICATIONS 2. For 400° C and above. For 100° C to 400° C, accuracy is 9° C. Common applications are above 800° C.
MODEL DESIGNATION AND SPECIFICATIONS UM344-2 Rotate Nameplate to Access Zero and Full Scale Adjustments Z FS X02803S1 3.75 (95.3) 1/2 NPT or M20 X 1.5 Tapped Hole (Electrical Entrance) 2 Places Clearance for Enclosure Cap Removal 2.44 (62.0) 7.95(201.9) w/Meter Option 8.94(227.1) 4.96(126.0) Digital Meter 5.95(151.1) 4.12(104.7) 2.99 (75.9) .85(21.6) 4.76 (120.9) 0.45(11.4) 0.90(22.
UM344-2 MODEL DESIGNATION AND SPECIFICATIONS Power Supply Minimum Compliance Voltage ................................+12 Vdc with no loop resistance, see Figure 4-4 Network (Current Sense or Loop) Resistance (RL) ................................................250Ω minimum, 1100Ω maximum *RL = 43.4V S - 520.8; where VS = power supply voltage Maximum Loop Voltage .........................................+42 Vdc; for Ex N use, see Section 8.3.6 Ripple ........................................................
MODEL DESIGNATION AND SPECIFICATIONS UM344-2 8.3.4 Sensor Inputs Common Mode Rejection .......................................120 dB at 50/60 Hz and 1000 ohm unbalanced input Normal Mode Rejection .........................................6 dB at 2 Hz and 60 dB at 50/60 Hz Input Overvoltage Protection ..................................+/-30 Vdc Digital Filter Range ................................................0.
UM344-2 MODEL DESIGNATION AND SPECIFICATIONS ESD Susceptibility ........................................................IEC severity level 4, 15 kV 8.3.6 Hazardous Area Classification Before installing, applying power to, or servicing a transmitter, see the transmitter's nameplate and the Table in section 8.1 for the electrical classification. Contact Moore Products Co. for latest approvals and certifications.
MODEL DESIGNATION AND SPECIFICATIONS UM344-2 It is a condition of safe use for Ex n and Ex d installations that any unused entry be blocked such that the IP rating is maintained and requires use of a tool to effect its removal.
UM344-2 September 1995 MODEL DESIGNATION AND SPECIFICATIONS 8-13
MODEL DESIGNATION AND SPECIFICATIONS UM344-2 8.3.6.1 CSA Hazardous Locations Precautions This section provides CSA hazardous location precautions that should be observed by the user when installing or servicing the equipment described in this Instruction. These statements supplement those given in the preceding section. WARNING Failure to observe the following precautions could result in an explosion hazard.
UM344-2 September 1995 MODEL DESIGNATION AND SPECIFICATIONS 8-15
UM344-2 GLOSSARY 9.0 GLOSSARY Listed here are terms used in the field of temperature measurement; terms and abbreviations that appear on a Moore XTC Communicator (MXC) screen; and terms relevant to HART networks. ALPHA - The average percent change in resistance per degree of a pure metal resistance device between 0 and 100 degrees Centigrade. Designated by the Greek letter alpha. ANALOG SIGNALING - A low current signal of 4 to 20 mAdc from a Field Instrument to a Primary Master or non-signaling hardware.
GLOSSARY UM344-2 DAMPING - A user selectable output characteristic that increases the response time of a transmitter to smooth the output when the input signal contains rapid variations. DIN - Deutsche Industrial Norms - A German agency that sets engineering and dimensional standards and has world-wide recognition. DIN 43760 - The standard that defines the characteristics of a 100 ohm platinum RTD having an R versus T curve with an Alpha of 0.00385 ohms per ohm per degree C.
UM344-2 GLOSSARY NETWORK RESISTANCE - Defined as the sum of the Current Sense Resistance, Barrier Resistance, if any, and any other resistance in the Network. NPT - National Pipe Thread OPTN = OPTION - MXC screen abbreviation OTHR = OTHER - MXC screen abbreviation OVRD = OVERRIDE - MXC screen abbreviation POINT-TO-POINT NETWORK - A Network having a single field instrument and Primary Master. Analog signaling or analog plus digital signaling is possible. PREV = PREVIOUS - MXC screen abbreviation.
GLOSSARY UM344-2 UPPER RANGE LIMIT (URL) - Determined by the transmitter's range, this is the highest value of the measured variable that the transmitter can be configured to measure. UPPER RANGE VALUE (URV) - Representing the 20 mA point in the transmitter's output, this is the highest value of the measured variable that the transmitter is currently configured to measure. XMIT/X-MITTR/X-MTR = TRANSMITTER - MXC screen abbreviations.
UM344-2 September 1995 GLOSSARY 9-5
UM344-2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS A.0 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS A.1 SENSOR INPUT BLOCK Input Type............... MV (Wide/Narrow), OHM (Wide/Narrow) RTD (PT 100 OHM DIN, PT 100 OHM US, PT 200 OHM DIN, PT 200 OHM US, PT 500 OHM DIN, PT 500 OHM US), T/C (J/K/E/T/R/S/B/N) T/C and RTD Measured Variable Units ......................... Celcius Fahrenheit Rankin Kelvin Millivolts (mV input only) Ohms (Ohm input only) Measured Variable Range Lo ......................
APPENDIX A - FUNCTION BLOCK DESCRIPTIONS UM344-2 3. Process Variable - When process variable is selected, the input will be displayed in process variable units. Auto Rerange automatically rescales the Process Variable in proportion to the Measured Variable in the Sensor Input Block. It will also rescale the Measured Variable range if the Process Variable range is changed.
UM344-2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS A.5 ALARM BLOCK Alarm 1 ............................................................ Enable/Disable Alarm 1 Setpoint .......................................... -999999 to 999999 Alarm 1 Type .......................................................... High/Low Alarm 2 ............................................................ Enable/Disable Alarm 2 Setpoint .......................................... -999999 to 999999 Alarm 2 Type ...........................
APPENDIX A - FUNCTION BLOCK DESCRIPTIONS UM344-2 is in MANUAL, the output is the manual (M) value (-1.0 to 110%). The manual value can be adjusted with the pushbuttons of the XTC or from the CHANGE VALVE key of the MXC. When the manual (M) value is not the function block output, it will track the output value of the controller function block. The A/M transfer can be configured as AUTO only. When the Automatic Mode Only parameter is selected as YES, the function block will remain in the AUTO position.
UM344-2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS Block Diagram, PID Controller PV TDs TD s+1 DG + + +/PG +/- Output + GE + R 1 SP F TI s + 1 X02879S0 PD Controller Controller .................................................................... On/Off Controller Type....................................................... PID/PD/ID Action............................................................... Reverse/Direct Proportional Gain (PID & PD) ...............................0.01 to 100.
APPENDIX A - FUNCTION BLOCK DESCRIPTIONS UM344-2 Equations O = GE + R MR AUTO R = TIs + 1 MANUAL R = F - GE ∴ O = F IF MRT = YES MR = F Block Diagram, PD Controller PV TDs TD DG s + 1 + + +/PG +/- Output + GE + R 1 SP MR TI s + 1 F X02879S0 ID Controller Controller Status ........................................................... On/Off Controller Type....................................................... PID/PD/ID Action...............................................................
UM344-2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS The gain for this controller is fixed at a value of 1.00. While the displayed gain can be changed, it will not affect the controller. Equations GE + F O= TIs + 1 AUTO when output O is connected to feedback F TDs 1 O = +/-PG[P(1+ )-S] + [ (TD/DG)s + 1 MANUAL ] TIs O=F Block Diagram, ID Controller PV TDs TD s+1 DG + + +/- 1 + +/- GE Output TI s + 1 + F SP X02880S0 A.9 FUNCTION BLOCK SUMMARY SENSOR INPUT BLOCK - Input Type MV (Millivolts)....
APPENDIX A - FUNCTION BLOCK DESCRIPTIONS UM344-2 - PV Range ......................................................LO and HI range values - Process Variable Units ...................................4 ASCII character tag (e.g., CEL, FAHR) - Auto Rerange.................................................
UM344-2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS TRANSMITTER ID BLOCK - Tag................................................................Unique 8 character identification - Descriptor ......................................................16 character description of transmitter - Message ........................................................32 character transmitter message - DD/MM/YY..................................................Enter day, month, and year in register - User ID Number ...............
APPENDIX A - FUNCTION BLOCK DESCRIPTIONS UM344-2 Sensor Input Terminals Transmitter Tag Damping Descriptor Sensor Block Message Zero/Span (MV Lo/Hi) Day / Month / Year User ID No. Meas. Variables Units Short Address Transmitter ID Block Normalization X02881S1 ON OFF PV Set Point SP Alarm Comparator No. 1 Setpoint Alarm 1 Alarm Comparator No.
UM344-2 September 1995 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS A-11
UM344-2 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS B.0 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS This Appendix contains four Figures that present wiring and barrier selection information for installation of a Model Series 344 Transmitter in a hazardous location. Refer to the barrier manufacturer’s installation instructions and the following Figures when installing or servicing a Transmitter in a hazardous location.
APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS B-2 UM344-2 September 1995
UM344-2 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS FIGURE B-1 Model 344 Hazardous Location Installation (Dwg.
APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS UM344-2 FIGURE B-2 Model 344, Barrier Selection (Dwg.
UM344-2 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS FIGURE B-3 Model 344, Hazardous Location Installation (Dwg.
APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS UM344-2 FIGURE B-4 Model 344, Intrinsically Safe Installation of Model 344 with Modell 772R (Dwg.
UM344-2 September 1995 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS B-7
UM344-2 WARRANTY WARRANTY The Company warrants all equipment manufactured by it and bearing its nameplate, and all repairs made by it, to be free from defects in material and workmanship under normal use and service.
WARRANTY W-2 UM344-2 October 1996
PARTS LIST XTC MODEL 344 TEMPERATURE TRANSMITTER-CONTROLLER R Drawing No.
PARTS LIST XTC MODEL 344 TEMPERATURE TRANSMITTER-CONTROLLER Drawing No.
USER’S MANUAL ADDENDUM UMA344-2-1 Issue: 1 March 1996 CONTROLLER MODE INSTALLATION WIRING INVOLVED USER’S MANUAL UM344-2, Issue 1, September 1995, XTC™ Transmitters, Series 344 Temperature Transmitters, User’s Manual ADDITIONAL MATERIAL The wiring diagram on the next page is for a Model 344 Transmitter-Controller configured for controller operation (controller function block ON and short address set to 0 for analog mode operation).
CONTROLLER MODE INSTALLATION WIRING UMA344-2-1 Network for Non-Hazardous Locations 250 See Note 2 _ HART Communication Filter See Note 7 See Note 6 _ Power Supply See Note 1 + I/P Device See Note 1 + Network Junction Qty. 2 Signal Test See Note 4 _ + Sensor Terminals + _ Optional Terminal Boards for Two Splices: Shield and Negative Lead Model 344 Terminals See Note 5 Notes: 1. I/P device examples are: Transducer Model 77, 771, 772R or 773 and Valve Positioner Model 750E or 760E.
USER’S MANUAL ADDENDUM UMA344-2-2 Issue: 1 March 1997 Ex N INSTALLATION CONDITION INVOLVED USER’S MANUAL UM344-2, Issue 1, XTC™ Transmitters, Series 344 Temperature Transmitters, User’s Manual ADDITIONAL MATERIAL The voltage at the loop terminals of a Model 344 installed in an area requiring an Ex N rating must be prevented from exceeding 42 Vdc.
