SMAR TT302 Operation And Maintenance Instruction Manual
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SMAR TT302 Operation And Maintenance Instruction Manual

Fieldbus temperature
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T T 3 0 2 M E

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Summary of Contents for SMAR TT302

  • Page 1 T T 3 0 2 M E...
  • Page 2 Specifications and information are subject to change without notice. For the latest updates, please visit the SMAR website above. BRAZIL CHINA FRANCE NETHERLANDS Smar Equipamentos Ind. Ltda. Smar China Corp. Smar France S. A. R. L. Smar Nederland Rua Dr.

  • Page 3: Table Of Contents

    SENSOR WIRING........................3.1 JUMPER CONFIGURATION .....................3.3 SENSOR CONFIGURATION ....................3.3 HOW TO CONNECT TWO SENSORS TO TT302 ..............3.5 COMPENSATION OF LEAD RESISTANCE FOR RTD or Ohm...........3.5 COMPENSATION OF LEAD RESISTANCE FOR RTD or Ohm Double Sensors ......3.6 CALIBRATION IN TT302 BY THE USER ...................3.6 CHANGING UNITS IN TEMPERATURE SENSORS..............3.7...
  • Page 4 TT302 – Fieldbus Temperature Transmitter...
  • Page 5 Introduction Introduction The TT302 is from the first generation of FIELDBUS devices. It is a transmitter mainly intended for measurement of temperature using RTDs or thermocouples, but can also accept other sensors with resistance or mV output such as: pyrometers, load cells, resistance position indicators, etc.
  • Page 6 TT302 – Fieldbus Temperature Transmitter WARNING This Manual is compatible with version 3.XX, where 3 denote software version and XX software release. The indication 3.XX means that this manual is compatible with any release of software version 3.

  • Page 7: Installation

    Section 1 Installation General The overall accuracy of temperature and other measurements depends on several variables. Although the transmitter has an outstanding performance, proper installation is essential in order to maximize its performance. Among all factors which may affect transmitter accuracy, environmental conditions are the most difficult to control.

  • Page 8: Network Wiring

    TT302 - Fieldbus Temperature Transmitter Network Wiring Access the terminal block by removing the Electrical Connection Cover. This cover can be locked closed by the cover locking screw (See Figure 1.1 - Cover Locking).To release the cover, rotate the locking screw clockwise.
  • Page 9 All devices are connected in parallel along the same pair of wires. Various types of Fieldbus devices may be connected on the same bus. The TT302 is powered via the bus. The limit for such devices is 16 for one bus for non-intrinsically safe requirement.

  • Page 10: Bus Topology And Network Configuration

    TT302 - Fieldbus Temperature Transmitter Bus Topology and Network Configuration Special requirements are applied to the terminator when used in a safety bus. When intrinsic safety is required, a barrier should be inserted on the trunk between the power supply and the terminator.
  • Page 11 OUT 1 Fieldbus H1 OUT 2 Fieldbus H1 OUT 3 Fieldbus H1 OUT 4 Spur Terminator Fieldbus H1 Enabled FUSE Junction 2,5A smar Shield PS302 PSI302 Terminator FAIL FAIL 1 FAIL 2 FAIL 3 FAIL 4 Spur Spur smar smar Figure 1.5 - Bus Topology...
  • Page 12 TT302 - Fieldbus Temperature Transmitter...

  • Page 13: Operation

    Section 2 Operation The TT302 accepts signals from mV generators such as thermocouples or resistive sensors such as RTDs. The criterion is that the signal is within the range of the input. For mV, the range is -50 to 500 mV and for resistance, 0-2000 Ohm.
  • Page 14 TT302 - Fieldbus Temperature Transmitter Communication Controller It monitors line activity, modulates and demodulates communication signals and inserts and deletes start and end delimiters. Power Supply Takes power of the loop-line to power the transmitter circuitry. Power Isolation Just like the signals to and from the input section, the power to the input section must be isolated.

  • Page 15: Temperature Sensor

    This is called cold junction compensation, and is done automatically by the TT302, which has a temperature sensor at the sensor terminals for this purpose. Secondly, if the thermocouple wires are not used, all the way to the terminals of the transmitter (e.g., copper wire is used from sensor-head...
  • Page 16 TT302 - Fieldbus Temperature Transmitter The TT302 permits a 2-wire connection that may cause measuring errors, depending on the length of connection wires and on the temperature to which they are exposed. (See Figure 2.3 - Two-Wire Connection). In a 2-wire connection, the voltage V2 is proportional to the RTD resistance plus the resistance of the wires.
  • Page 17 Operation In a 4-wire connection, terminals 2 and 3 are high impedance inputs. Thus, no current flows through those wires and no voltage drop is caused. The resistance of the other two wires is not of interest, since there is no measurement registered on them. Hence the voltage V2 is directly proportional to the RTD resistance.
  • Page 18 TT302 - Fieldbus Temperature Transmitter...

  • Page 19: Configuration

    Configuration One of the many advantages of Fieldbus is that device configuration is independent of the configurator. The TT302 may be configured by a third party terminal or console operator. Any particular configurator is therefore not addressed here. The TT302 contains two input transducer blocks, one resource block, one display transducer block and other function blocks.
  • Page 20 TT302 - Fieldbus Temperature Transmitter When the sensor is dual, the sensor connected between terminals 3 and 4 is associated with the first transducer, and the sensor connected between terminals 2 and 4 is associated with the second transducer. NOTE Avoid routing sensor wiring close to power cables or switching equipment.

  • Page 21: Jumper Configuration

    Configuration Jumper Configuration In order to work properly, the jumpers J1 and J3 located in the TT302 main board must be correctly configured. J1 is responsible to enable the AI block simulate mode. W1 is responsible to enable the local adjustment.
  • Page 22 TT302 - Fieldbus Temperature Transmitter NOTE There are no 3 or 4 wire connections for millivoltage sensors. This parameter This list contains selects the type of the number of sensor attached to wires available for the TT302 in order each type of to measure sensor.

  • Page 23: How To Connect Two Sensors To Tt302

    Table 3.2 - Type of Connection Table How to Connect Two Sensors to TT302 Transmitters series TT302 are capable of operating simultaneously with two sensors, using two transducer blocks, if necessary. Configuration types in two sensors operation are as follows: Differential –...

  • Page 24: Compensation Of Lead Resistance For Rtd Or Ohm Double Sensors

    3 or 4 wire sensors are usually preferred. With TT302 is possible to connect two sensors to the terminal block. Due to space limitations in the terminal block, it is only possible to connect two 2-wire sensors. In order to optimize lead resistance...

  • Page 25: Calibration In Tt302 By The User

    The electronics of TT302 is very stable in time, not requiring further calibrations after manufacturer’s calibration. However, if the client decides to use his reference to calibrate the TT302, this may be done through the parameters CAL_POINT_LO and CAL_POINT_HI. Always use two points as reference when trim is performed;...

  • Page 26: Changing Units In Temperature Sensors

    TT302 - Fieldbus Temperature Transmitter Figure 3.9 – Calibration of the Upper Trim - TT302 Trim is not available for TT302 using two sensors in the backup or differential mode. Changing Units in Temperature Sensors The following units are available for temperature sensors: Celsius, Rankine, Kelvin and Fahrenheit.

  • Page 27: Transducer Display - Configuration

    Configuration Figure 3.10 –Temperature Sensor Unit Transducer Display – Configuration Using the SYSCON is possible to configure the Display Transducer block. As the name described it is a transducer due the interfacing of its block with the LCD hardware. The Transducer Display is treated as a normal block by SYSCON. It means, this block has some parameters can be configured according to customer's needs.

  • Page 28: Display Transducer Block

    TT302 - Fieldbus Temperature Transmitter Display Transducer Block There are seven groups of parameters which may be pre-configured by the user in order to enable a possible configuration by means of the local adjustment. As an example, let’s suppose that you don’t want to show some parameters;...
  • Page 29 Configuration Figure 3.12 - Parameters for Local Adjustment Configuration Figure 3.13 - Parameters for Local Adjustment Configuration 3.11...
  • Page 30 TT302 - Fieldbus Temperature Transmitter Figure 3.14 - Parameters for Local Adjustment Configuration Figure 3.15 - Parameters for Local Adjustment Configuration 3.12...

  • Page 31: Programming Using Local Adjustment

    Installation, Operation and Maintenance Procedures Manual". Take a look at this manual in the chapter related to "Programming Using Local Adjustment". identification plate, two holes The TT302 has, underneath its marked with the letters S and Z beside them. These holes give access to two magnetic switches (Reed Switch), which can be activated by the magnetic tool (See Figure 3.17).

  • Page 32: J1 Jumper Connections

    Magnetic Tool Span Hole Zero Hole Figure 3.17 - Local Adjustment Holes Table 3.4 shows the actions on the Z and S holes on the TT302 when Local Adjustment is enabled. HOLE ACTION Initializes and rotates through the available functions.

  • Page 33: Local Programming Tree

    5 place the magnetic seconds. tool in orifice Z and wait until letters MD are displayed. Figure 3.19 - Step 1 - TT302 Remove the Insert the magnetic tool magnetic tool in from orifice S . orifice S once...
  • Page 34 In order to increment the value, keep the tool insert in S up to set the value desired. Figure 3.22 - Step 4 - TT302 In order to range the In order to upper value (upper), decrement the simply insert the...
  • Page 35 3.1. See it to do the correct choice of the connection value. Figure 3.25 - Step 7 - TT302 Transducer Block Parameters Description The parameters described below are used to configure the transducer block, having direct influence in the hardware.
  • Page 36 TT302 - Fieldbus Temperature Transmitter PARAMETER DESCRIPTION 181 – Ohm 100 180 – Ohm 400 104 – Ohm 2000 134 – TC B NBS 136 – TC E NBS 137 – TC J NBS 138 – TC K NBS 139 – TC N NBS 140 –...
  • Page 37 Configuration Transducer Block Parameters Types Parameter Data Type Storage Size Initial Value Class ST_REV Unsigned16 TAG_DESC Octet String Nulls STRATEGY Unsigned16 ALERT_KEY Unsigned8 MODE_BLK DS-69 AUTO BLOCK_ERR Bit String UPDATE_EVT DS-73 BLOCK_ALM DS-72 TRANSDUCER_DIRECTORY Array of Variable Unsigned16 TRANSDUCER_TYPE Unsigned16 XD_ERROR Unsigned8 COLLECTION_DIRECTORY...
  • Page 38 TT302 - Fieldbus Temperature Transmitter Transducer Block Parameters View Parameter View_1 View_2 View_3 View_4 ST_REV TAG_DESC STRATEGY ALERT_KEY MODE_BLK BLOCK_ERR UPDATE_EVT BLOCK_ALM TRANSDUCER_DIRECTORY TRANSDUCER_TYPE XD_ERROR COLLECTION_DIRECTORY PRIMARY_VALUE_TYPE PRIMARY_VALUE PRIMARY_VALUE_RANGE CAL_POINT_HI CAL_POINT_LO CAL_MIN_SPAN CAL_UNIT SENSOR_TYPE SENSOR_RANGE SENSOR_SN SENSOR_CAL_METHOD SENSOR_CAL_LOC SENSOR_CAL_DATE SENSOR_CAL_WHO...

  • Page 39: Maintenance Procedures

    Check for intermittent short circuits, open circuits and grounding problems. Check if the sensor is correctly connected to the TT302 terminal block. Check if the sensor signal is reaching the TT302 terminal block by measuring it with a multimeter at the transmitter end.

  • Page 40: Disassembly Procedure

    TT302 - Fieldbus Temperature Transmitter If the problem is not presented in the table above follow the Note below: NOTE The Factory Init should be tried as a last option to recover the equipment control when the equipment presents some problem related to the function blocks or the communication. This operation must only be carried out by authorized technical personnel and with the process offline, since the equipment will be configured with standard and factory data.

  • Page 41: Interchangeability

    EEPROM. In the case of one board being faulty, both must be replaced. Returning Materials Should it become necessary to return the transmitter to SMAR, simply contact your local agent or SMAR office, informing the defective instrument’s serial number, and return it to our factory.
  • Page 42 TT302 - Fieldbus Temperature Transmitter ACCESSORIES ORDERING CODE DESCRIPTION Magnetic Tool for Local Adjustment SYSCON System Configurator PS302 Power Supply BT302 Terminator DFI302 Fieldbus Universal Bridge Table 4.2 - Accessories of SYSTEM 302 SPARE PARTS LIST CATEGORY DESCRIPTION OF PARTS...
  • Page 43 Maintenance Procedures SPARE PARTS LIST CATEGORY DESCRIPTION OF PARTS POSITION CODE (NOTA 1) . Housing in Aluminum 314-0125 . Housing in 316 Stainless Steel 214-0125 MOUNTING BRACKET FOR 2” PIPE MOUNTING (NOTE 4) . Carbon Steel 214-0801 . Stainless Steel 316 214-0802 .
  • Page 44 TT302 - Fieldbus Temperature Transmitter...

  • Page 45: Technical Characteristics

    Section 5 Technical Characteristics Functional Specifications Inputs Signal See the following table for options. Output Signal Digital only. Foundation Fieldbus 31.25 kbit/s voltage mode with bus power. Power Supply Bus power: 9 to 32 V DC. Current consumption: quiescent 12 mA. Output impedance: non-intrinsic safety from 7.8 kHz to 39 kHz should be greater or equal to 3 kOhm.

  • Page 46: Physical Specifications

    TT302 - Fieldbus Temperature Transmitter Ohms (0...400), RTD (DIN: Ni120; IEC: Pt50, Pt100; JIS: Pt50, Pt100): ±0.03% of reading or 0.04 whichever is greater. Ohms (0...2000), RTD (IEC: Pt500): ±0.03% of reading or 0.2 whichever is greater. TC: Cold-junction compensation rejection 60:1 Reference: 25,0 ± 0,3ºC.
  • Page 47 Technical Characteristics RANGE MINIMUN DIGITAL * SENSOR SPAN mV ACCURACY % µ 0.40 ±0.02% ±2 µ 2.00 ±0.02% ±10 µ 10.00 ±0.02% ±50 µ 0.40 ±0.1% ±10 mV DIF. µ -110 ±0.1% ±50 Table 5.2 - Sensor Milivoltagem Characteristics DIGITAL * MINIMUN SENSOR RANGE OHM...

  • Page 48: Appendix

    TT302 - Fieldbus Temperature Transmitter Appendix...

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