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USER’S MANUAL UM344 - 2 Issue 1 August 1995 XTC TRANSMITTERS SERIES 344 TERMPERATURE TRANSMITTERS USER’S MANUAL.
UM344 - 2 CONTENTS September 1995 i TABLE OF CONTENTS SECTION AND TITLE PAGE 1.0 INTRODUCTION ................................................................................................................. 1 - 1 1.1 SECTION CONTENTS ................
CONTENTS UM344 - 2 SECTION AND TITLE PAGE September 1995 ii 4.3.6 Network Junctions .................................................................................................... 4 - 11 4.3.7 Safety Barriers .....................................
UM344 - 2 CONTENTS SECTION AND TITLE PAGE September 1995 iii 6.1.3 RTD/OHM Type Input Calibration .............................................................................. 6 - 6 6.1.3.1 RTD/OHM Calibration Check ..................................
CONTENTS UM344 - 2 SECTION AND TITLE PAGE September 1995 iv 9.0 GLOSSARY ..............................................................................
UM344 - 2 CONTENTS SECTION AND TITLE PAGE September 1995 v A.0 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS ................................................... A - 1 B.0 APPENDIX B - HAZARDOUS AREA INSTALLATION ............................................
CONTENTS UM344 - 2 SECTION AND TITLE PAGE September 1995 vi LIST OF TABLES 4.1 Operating Mode and Network Type ........................................................................................... 4 - 3 4.2 Thermocouple and Extension Grade Wire Characteristics .
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CONTENTS UM344 - 2 September 1995 vi.
1 - 1 UM344 - 2 INTRODUCTION September 1995 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.
1 - 2 INTRODUCTION UM344 - 2 September 1995 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 lis ted.
1 - 3 UM344 - 2 INTRODUCTION September 1995 FIGURE 1 - 2 Terminal Connections 1.2 PRODUCT DESCRIPTION The Model 344 Temperature Transmitter, shown in Figure 1 - 1, is a microprocessor - based measurement and control device which combines accurate, reliable temperature measurement and a PID controller in one unit.
1 - 4 INTRODUCTION UM344 - 2 September 1995 The HART protocol is used for communication between the transmitter and a Mo ore XTC Communicator (MXC), a personal computer running MXTC Configuration Software or other remote device.
UM344 - 2 XTC COMMUNICATOR September 1995 2 - 1 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.
XTC COMMUNICATOR UM344 - 2 September 1995 2 - 2 ON F1 F2 F3 F4 OFF TRANS. VAR'S A B C 1 TREND ZOOM STATUS CHANGE SP D E F G H I 2 3 VALVE J K L M N O P Q R A/M S T U V W X Y Z # 4 6 5 7 8 9 TUNE @ % & __ SPACE 0 + / * .
UM344 - 2 XTC COMMUNICATOR September 1995 2 - 3 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.
XTC COMMUNICATOR UM344 - 2 September 1995 2 - 4 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 deactivat ed by again pressing the key.
UM344 - 2 XTC COMMUNICATOR September 1995 2 - 5 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 exi t this mode.
XTC COMMUNICATOR UM344 - 2 September 1995 2 - 6 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.
UM344 - 2 XTC COMMUNICATOR September 1995 2 - 7 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.
XTC COMMUNICATOR UM344 - 2 September 1995 2 - 8 Main Menu On - Line Menu On - Line Configuration Menu Calibrate/Test Menu Function Block Menu Configuration Complete Menu Loop Override Menu MXC screens.
UM344 - 2 XTC COMMUNICATOR September 1995 2 - 9 FIGURE 2 - 3 Parameter Map, MXC/Model 344 ENTER EDIT ARCH ABORT END DOWN LOAD ARCH FUNC ENTER ARCH# RE- START EXIST NOT EXIST SELECT TYPE EDIT ARCH FIND.
XTC COMMUNICATOR UM344 - 2 September 1995 2 - 10.
UM344 - 2 INITIAL TRANSMITTER SET - UP September 1995 3 - 1 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.
INITIAL TRANSMITTER SET - UP UM344 - 2 September 1995 3 - 2 Bench Power Supply (DC) _ + Digital Milliammeter + _ 250 MXC + _ + _ Signal Test Resistance Decade Box X02807S1 Model 344 Terminals FIGURE 3.
UM344 - 2 INITIAL TRANSMITTER SET - UP September 1995 3 - 3 3.2 ESTABLISHING COMMUNICATION 1. Connect the transmitter as shown in either Figure 3 - 1 or 3 - 2. 2. Apply power to the loop. 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 September 1995 3 - 4 NOTE Analog and Digital modes are discussed in detail in Section 4. 5. The MXC will next prompt for a digital method of searching. Press one of the following keys. SHRT ADDR (F1) - Press and then enter the sh ort address (1 - 15) stored during configuration.
UM344 - 2 INITIAL TRANSMITTER SET - UP September 1995 3 - 5 The next screen to appear is used to save the configuration to an archive. If the configuration is to be edited, press YES (F4) to save the configuration in case a mistake is made. The next screen will prompt for an archive number (0 - 99).
INITIAL TRANSMITTER SET - UP UM344 - 2 September 1995 3 - 6 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 September 1995 3 - 7 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 the n returns to the original test screen.
INITIAL TRANSMITTER SET - UP UM344 - 2 September 1995 3 - 8 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.
UM344 - 2 INITIAL TRANSMITTER SET - UP September 1995 3 - 9 1) At the On - Line Menu, press CONFIG to access the function blocks. Continue through the menu sequence until rea ching the Function Block Menu. 2) Check the information in the eight function blocks listed below.
INITIAL TRANSMITTER SET - UP UM344 - 2 September 1995 3 - 10 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.
UM344 - 2 INITIAL TRANSMITTER SET - UP September 1995 3 - 11 P - Process Variable 4. Check these Transmitter Variables to ensure the rea dings are correct.
UM344 - 2 INSTALLATION September 1995 4 - 1 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.
INSTALLATION UM344 - 2 September 1995 4 - 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.
UM344 - 2 INSTALLATION September 1995 4 - 3 Ÿ Determine conduit routing. Refer to Section 4.4.5. Ÿ Prepare installation site drawings showing the following: Ÿ L ocation of the Master Device (e.
INSTALLATION UM344 - 2 September 1995 4 - 4 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.
UM344 - 2 INSTALLATION September 1995 4 - 5 250 See Note 2 MXC See Note 4 See Note 3 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. The host input device can be either a HART or non-HART signaling device, a Primary Master or a Secondary Master.
INSTALLATION UM344 - 2 September 1995 4 - 6 FIGURE 4 - 1 Point - To - Point Network (Analog Mode) FIGURE 4 - 2 Model 352 SLDC and Model 344 Connections (Analog Mode) 250 See Note 1 Model 352 Rear Terminals See Note 4 A4 B5 MXC AG A5 Hazardous Location Non-Hazardous Location Notes: 1.
UM344 - 2 INSTALLATION September 1995 4 - 7 FIGURE 4 - 3 Multi - Drop Network (Digital Mode) 250 See Note 2 MXC Hazardous Location Non-Hazardous Location Supply and Return Barriers Shown Above See Note 5 See Note 4 Notes: 1. The System Power Supply is shown separate from the host input device.
INSTALLATION UM344 - 2 September 1995 4 - 8 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.
UM344 - 2 INSTALLATION September 1995 4 - 9 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.
INSTALLATION UM344 - 2 September 1995 4 - 10 Power supply output voltage must be less than the calculated value. The maximum voltage across the input terminals of a Transmitter should nev er exceed 42 volts. The maximum number of Transmitters that can be connected to a Multi - Drop Network is fifteen.
UM344 - 2 INSTALLATION September 1995 4 - 11 C: 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. C f : Total input terminal capacitance of Field Instruments; the Primary Master is excluded .
INSTALLATION UM344 - 2 September 1995 4 - 12 Ÿ A Junction should be a simple electrical series connection containing NO repeaters or other devices (active or passive) that can degrade HART communications.
UM344 - 2 INSTALLATION September 1995 4 - 13 Ÿ Individual miscellaneous hardware must meet the following requirements: Ÿ Capacitance to Ground ................ 50 pF maximum Ÿ Resistance to Ground ................. 1 M Ω minimum Ÿ Impedance if Series Connected .
INSTALLATION UM344 - 2 September 1995 4 - 14 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.
UM344 - 2 INSTALLATION September 1995 4 - 15 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.
INSTALLATION UM344 - 2 September 1995 4 - 16 b) 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 gr ounded.
UM344 - 2 INSTALLATION September 1995 4 - 17 1) Refer to Figure 4 - 5 and align four mounting holes in the base of the enclosure with the four 0.281 - inch diameter holes in the Bracket. Note that the transmitter can be mounted to the Bracket in four possible positions (90° apart) to the Bracket.
INSTALLATION UM344 - 2 September 1995 4 - 18 FIGURE 4 - 5 Di mensions, Mounting Bracket for Model 344 5.90 (149.9) 4.44 (112.8) 3.80(96.5) 4.04(102.6) .
UM344 - 2 INSTALLATION September 1995 4 - 19 OR Pipe Mounting Horizontal 4.82(122.4) 5.06(128.5) Vertical 4.30 (109.2) Wall Mounting X02822S0.
INSTALLATION UM344 - 2 September 1995 4 - 20 FIGURE 4 - 6 Model 344 Mounting Configurations with Supplied Bracket.
UM344 - 2 INSTALLATION September 1995 4 - 21 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.
INSTALLATION UM344 - 2 September 1995 4 - 22 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.
UM344 - 2 INSTALLATION September 1995 4 - 23 FIGURE 4 - 7 Transmitter - To - Process Mounting Wall of Pipe or Process Vessel Thermowell Hex Sensor Hex Union Conduit for 2-Wire Loop Wiring Model 344 Tr.
INSTALLATION UM344 - 2 September 1995 4 - 24 Sensor Element Extension Wires 1/2 NPT Nipple (Screws into Transmitter Conduit Inlet) Extension Assembly Sensor Probe Sheath Thermowell Sensor Probe Probe .
UM344 - 2 INSTALLATION September 1995 4 - 25 4.4.4 Local Digital Meter Installation, Repositioning and Removal Three proced ures 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.
INSTALLATION UM344 - 2 September 1995 4 - 26 3. At the Electronics Module, remove the meter mounting bracket attached to the left corner of bottom circuit board .
UM344 - 2 INSTALLATION September 1995 4 - 27 Digital LCD Meter Meter Mounting Screw, qty. 2 Notes 1, 2 and 3 Cable connectors J1 to J4 wired in parallel Disconnect Cable Cable guide slot (4 places) X02870S1 Meter Repositioned 90 CCW o Meter Repositioned 180 o Notes: 1.
INSTALLATION UM344 - 2 September 1995 4 - 28 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.
UM344 - 2 INSTALLATION September 1995 4 - 29 FIGURE 4 - 11 Conduit Drain and Explosion Proof Installations Plug unused entrance Conduit Drain Installation Drain Seal Conduit for field wiring (DC power) For explosion proof installation use conduit seal, Crouse-Hinds type EYS or equivalent, on wiring outlet.
INSTALLATION UM344 - 2 September 1995 4 - 30 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.
UM344 - 2 INSTALLATION September 1995 4 - 31 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.
INSTALLATION UM344 - 2 September 1995 4 - 32 FIGURE 4 - 12 Signal (Loop) , Sensor, MXC and Test Terminals 4. Con nect the loop cable to the SIGNAL (+) and ( - ) terminals inside the Transmitter's enclosure. Refer to Figure 4 - 1, 4 - 2 or 4 - 3 for the needed connections for the type of Network.
UM344 - 2 INSTALLATION September 1995 4 - 33 + - Signal Cable Note 2 Note 1 RTD+ RTD- No connection A. 2-Wire RTD Note 2 RTD- RTD+ Signal Cable Note 2 Note 2 RTD+ RTD- RTD- RTD+ No connection RTDI RTDI B. 3-Wire RTD Signal Cable Note 2 RTD+ RTDI RTD- Note 2 No connection No connection RTD- RTD+ C.
INSTALLATION UM344 - 2 September 1995 4 - 34 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.
UM344 - 2 INSTALLATION September 1995 4 - 35 7. If one of th e 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.
INSTALLATION UM344 - 2 September 1995 4 - 36.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION September 1995 5 - 1 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 UM344 - 2 Septemb er 1995 5 - 2 1. Establish communication with a transmitter; see Section 3.2. The On - Line Menu shown adjacent should be displayed. 2. Pres s 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 August 1995 5 - 3 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.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 4 8. The R ange 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.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 5 Press E NTER 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. NOTE To conserve battery power, the MXC should not be left in the Sensor Input mode.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 6 4. Set Auto Rerange to enable or disable using the LAST OPTN and NEXT OPTN keys. Press SEL/CONT to continue.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 7 SHORT ADDRESS 00 ENTER ADDRESS EN- < QUIT TER NOTE Only numbers m ay be used in the serial number field. Press SEL/CONT to display the Short Address screen. Pressing SEL/END will end configuration of the transmitter ID Block.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 8 4. Press EDIT (F1) to edit the setpoint value. Press ENTER (F4) to change the setpoint value.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 9 5. Press SEL/CONT (F4) to configure the alarm type. 6. Press NEXT OPTN (F2) to choose either HIGH or LOW. 7. Press SEL/CONT (F4) to configure Alarm 2 or SEL/END (F3) to return to the Function Block Menu.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 10 3. Press EDIT (F1) to edit the Power - Up Valve setting. Press ENTER (F4) to change the setting, press QUIT (F3) to exit with out changing the setting. Press SEL/CONT (F4) to return to the Function Block menu.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 11 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 UM344 - 2 Septemb er 1995 5 - 12 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 c onfiguration changes are entered.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 13 Ÿ 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 UM344 - 2 Septemb er 1995 5 - 14 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.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 15 5.1.3.1 Display Functions The numerals displayed on the Digital Meter represent the value o f 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.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 16.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 17 5.1.3.2 Local Pushbutton Input Ranging (Controller OFF) 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.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 18 too small, in which case no new ZERO or FULLSCALE value is stored). 3. Change FULLSCALE range value: 1) Supply FULLSCALE value.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 19 5.1.3.3 Local Pushbutton Damping Adjustment (Controller OFF) 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.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 20 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.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 21 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.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 22 1. The Controller must be in the MANUAL control mode to change the VAL VE; if it is not, place the Controller in the MANUAL control mode.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 23 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.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 24 5.1.4 Quick Access Key Operation 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.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 25 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. 5) Press either TREND or F4 to exit this screen.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 26 CHANGE SP - allows you to view and change t he on - line - setpoint of the controller. 1) Enter new setpoint and press ENTER (F4) to store the value. 2) Press the “CHANGE SP” key again or END (F3) to exit.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 27 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.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 28 4. Use PREV and NEXT to select the transmitter type - Temperature - then press SELECT. The default configur - ation for a temperature transmitter will be loaded into the Off - Line Memory of the MXC.
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 29 - If the tagname is changed, press SEL/END or SEL/CONT to re turn to the original Save screen.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 30 resident in the transmitter - simply r espond to the prompt, continue or abort..
UM344 - 2 ON - LINE AND OFF - LINE OPERATION August 1995 5 - 31 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.
ON - LINE AND OFF - LINE OPERATION UM344 - 2 Septemb er 1995 5 - 32.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 1 6.0 CALIBRATION AND MAINTENANCE This section describes calibration, preventive maintenance, and troubleshooting The Maintenance section has p.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 2 6.1.1 Equipment Required Ÿ Moore XTC Communicator (MXC) - refer to Section 2 of this User's Manual Ÿ Laboratory grade digital multimeter (DMM); for calibrating the 4 to 20 mA output signal Voltmeter Section .
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 3 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 oper ation and, if necessary, follow the proper procedures to shut down the process.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 4 Bench Power Supply (DC) _ + Digital Milliammeter + _ 250 MXC + _ + _ Signal Test Resistance Decade Box X02807S1 1 2 3 Model 344 Terminals FIG.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 5 12. Read the ammeter. If the o utput 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.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 6 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.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 7 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.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 8.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 9 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.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 10 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.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 11 2. Determine millivolt values for thermocouple or mV input. • Thermocouple Type Input: Consult user supplied TC millivolt vs temperature table and record the millivolt value s corresponding to the Zero and Full Scale temperatures.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 12 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.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 13 The MXC's screen will display: 3. Adjust the output of the millivolt source to 103.000 mV.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 14 4. Press CONT (F4). Screen will display: 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. Press ABRT (F3) to quit without changing calibration.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 15 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.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 16 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. In spect the enclosure O - ring for damage.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 17 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.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 18 Transmitter LCD 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.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 19 Repeat the "TEST" program to ensure the validity of the reported fault. Press END (F4) to exit the CALIBRATE/TEST program.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 20 POSSIBLE CAUSE CORRECTIVE ACTION Loop Wiring Failure Check for 12 Vdc minimum across SIGNAL +/ - terminals in transmitter terminal compartment. Check polarity of loop wiring at both power supply and transmitter.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 21 TABLE 6.2 Message - No Transmitter Found, Continued Possible Cause: Loop Power Supply Failure Check power supply output voltage for installe.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 22 TABLE 6.4 Message - Field Device Malfunction This message results when, after having successfully established communications with a transmitter, a transmit ter self - diagnostics failsafe flag is detected in a received message.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 23 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: 1 7 Vdc minimum, 42 Vdc maximum.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 24 TABLE 6.7 Symptom - Output Current Fixed Below Scale at Approximately 3.84 mA POSSIBLE CAUSE CORRECTIVE ACTION Loop supply voltage less than 12 Vdc at transmitter SIGNAL +/ - terminals. Replace power supply.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 25 TABLE 6.9 Symptom - Erratic Output POSSIBLE CAUSE CORRECTIVE ACTION Loop Wiri ng Check for 12 Vdc minimum across SIGNAL +/ - terminals in transmitter terminal compartment. Check power supply output voltage: 17 Vdc minimum; 42 Vdc maximum.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 26 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.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 27 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.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 28 • 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.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 29 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.
CALIBRATION AND MAINTENANCE UM344 - 2 September 1995 6 - 30 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.
UM344 - 2 CALIBRATION AND MAINTENANCE September 1995 6 - 31.
UM344 - 2 CIRCUIT DESCRIPTION September 1995 7 - 1 7.0 CIRCUIT DESCRIPTION This section provides a basic circuit description of the XTC Model 344 Temperature Transmitter - Controller.
CIRCUIT DESCRIPTION UM344 - 2 September 1995 7 - 2 FIGURE 7 - 1 Model 344 Electronics Module Block Diagram RTDI+ 104 uA Source TC+ RTD TC TC-/RTD- Upscale/ Downscale Burnout Trickle Current P-Channel .
UM344 - 2 CIRCUIT DESCRIPTION September 1995 7 - 3 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.
CIRCUIT DESCRIPTION UM344 - 2 September 1995 7 - 4 Analog Switch is turned on enabling the 52 µ A sink circuit..
UM344 - 2 CIRCUIT DESCRIPTION September 1995 7 - 5 The current from the 104 microamp source is applied to the RTDI(+) pin which is jumpered to the TC(+) pin. Since the 52 µ A sin k 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 September 1995 8 - 1 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.
MODEL DESIGNATION AND SPECIFICATIONS UM344 - 2 September 1995 8 - 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. Optio nal, wired - on SS tags are also available.
UM344 - 2 MODEL DESIGNATION AND SPECIFICATIONS September 1995 8 - 3 ** Refer to corresponding GC344T_ or PI34 - 3 for ordering information..
MODEL DESIGNATION AND SPECIFICATIONS UM344 - 2 September 1995 8 - 4 9.00 (22.9) 6.00 (15.2) 2.00 (5.10) See Note Thermocouple Thermowell Assembly 9.00 (22.9) 6.00 (15.2) 2.00 (5.10) See Note 3-Wire RTD Thermowell Assembly Note: Typical Well Lengths in Inches (Centimeters).
UM344 - 2 MODEL DESIGNATION AND SPECIFICATIONS September 1995 8 - 5 Table 8.4 provides a list of replacement thermocouples and RTDs for Model 344T series thermal sensors. In critcal app lications, 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.
MODEL DESIGNATION AND SPECIFICATIONS UM344 - 2 September 1995 8 - 6 8.3 SPECIFICATIONS The following specifications are for all transmitter models except as noted. 8.3.1 Mechanical Transmitter Dimensions ...............................................
UM344 - 2 MODEL DESIGNATION AND SPECIFICATIONS September 1995 8 - 7 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 September 1995 8 - 8 FIGURE 8 - 3 Model 344 Dimensions Accuracy, Analog Output D/A Converter Accuracy ........................................ 0.075% of span over entire temperature range Total Accuracy .
UM344 - 2 MODEL DESIGNATION AND SPECIFICATIONS September 1995 8 - 9 Power Supply Minimum Compliance Voltage ................................ +12 Vdc with no loop resistance, see Figure 4 - 4 Network (Current Sense or Loop) Resistance (R L ) ..........
MODEL DESIGNATION AND SPECIFICATIONS UM344 - 2 September 1995 8 - 10 8.3.4 Sensor Inputs Common Mode Rejection ....................................... 120 dB at 50/60 Hz and 1000 ohm unbalanced input Normal Mode Rejection .............................
UM344 - 2 MODEL DESIGNATION AND SPECIFICATIONS September 1995 8 - 11 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 th e Table in section 8.
MODEL DESIGNATION AND SPECIFICATIONS UM344 - 2 September 1995 8 - 12 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 MODEL DESIGNATION AND SPECIFICATIONS September 1995 8 - 13.
MODEL DESIGNATION AND SPECIFICATIONS UM344 - 2 September 1995 8 - 14 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.
UM344 - 2 MODEL DESIGNATION AND SPECIFICATIONS September 1995 8 - 15.
UM344 - 2 GLOSSARY September 1995 9 - 1 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.
GLOSSARY UM344 - 2 September 1995 9 - 2 DAMPING - A user selectable output characteristic that increases the response time of a transmitter to smooth the output wh en the input signal contains rapid variations. DIN - Deutsche Industrial Norms - A German agency that sets engineering and dimensional standards and has world - wide recognition.
UM344 - 2 GLOSSARY September 1995 9 - 3 NETWORK RESISTANCE - Defined as the sum of the Current Sense Resistance, Barrier Resistance, if any, and any other resistance in the Network.
GLOSSARY UM344 - 2 September 1995 9 - 4 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.
UM344 - 2 GLOSSARY September 1995 9 - 5.
A - 1 UM344 - 2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS September 1995 A.0 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS A.1 SENSOR INPUT BLOCK Input Type .
A - 2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS UM344 - 2 September 1995 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.
A - 3 UM344 - 2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS September 1995 A.5 ALARM BLOCK Alarm 1 ............................................................ Enable/Disable Alarm 1 Setpoint .......................................... - 999999 to 999999 Alarm 1 Type .
A - 4 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS UM344 - 2 September 1995 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.
A - 5 UM344 - 2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS September 1995 PD Controller Controller .................................................................... On/Off Controller Type ....................................................... PID/PD/ID Action .
A - 6 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS UM344 - 2 September 1995 Equations O = GE + R MR AUTO R = TIs + 1 MANUAL R = F - GE ∴ O = F IF MRT = YES MR = F ID Controller Controller Status ..........................................................
A - 7 UM344 - 2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS September 1995 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 TIs MANUAL O = F A.
A - 8 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS UM344 - 2 September 1995 - PV Range ...................................................... LO and HI range values - Process Variable Units ................................... 4 ASCII character tag (e.g., CEL, FAHR) - Auto Rerange .
A - 9 UM344 - 2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS September 1995 TRANSMITTER ID BLOCK - Tag ................................................................ Unique 8 character identification - Descriptor ........................................
A - 10 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS UM344 - 2 September 1995 Transmitter Tag Descriptor Message Day / Month / Year User ID No. Sensor Input Terminals Damping Zero/Span (MV Lo/Hi) Meas.
A - 11 UM344 - 2 APPENDIX A - FUNCTION BLOCK DESCRIPTIONS September 1995.
B - 1 UM344 - 2 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS September 1995 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.
B - 2 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS UM344 - 2 September 1995.
B - 3 UM344 - 2 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS September 1995 FIGURE B - 1 Model 344 Hazardous Location Installation (Dwg. 15032 - 3441, Sheet 1 of 4).
B - 4 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS UM344 - 2 September 1995 FIGURE B - 2 Model 344, Barrier Selection (Dwg. 15032 - 3441, Sheet 2 of 4).
B - 5 UM344 - 2 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS September 1995 FIGURE B - 3 Model 344, Hazardous Location Installation (Dwg. 15032 - 3441, Sheet 3 of 4).
B - 6 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS UM344 - 2 September 1995 FIGURE B - 4 Model 344, Intrinsically Safe Installation of Model 344 with Modell 772R (Dwg.
B - 7 UM344 - 2 APPENDIX B - HAZARDOUS AREA INSTALLATION DRAWINGS September 1995.
UM344 - 2 WARRANTY October 1996 W - 1 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 UM344 - 2 W - 2 October 1996.
PARTS LIST 9/95 Supersedes 8/91 Ref. UM344 - 2 XTC MODEL 344 TEMPERATURE TRANSMITTER - CONTROLLER Drawing No. 15965 - 639PL MODELS PART NUMBERS 344BNNN1G 15965 - 1114 344BN5N1G 15965 - 1115 ITEM P.
PARTS LIST XTC MODEL 344 TEMPERATURE TRANSMITTER - CONTROLLER Drawing N o. 15965 - 639PL.
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.
CONTROLLER MODE INSTALLATION WIRING UMA344 - 2 - 1 2 250 See Note 2 See Note 4 Notes: 1. I/P device examples are: Transducer Model 77, 771, 772R or 773 and Valve Positioner Model 750E or 760E. The I/P can be either a HART or non-HART signalling device, a Primary Master or a Secondary Master.
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 .
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