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BRAZIL CHINA FRANCE GERMANY MEXICO Smar Equipamentos Ind. Ltda. Smar China Corp. Smar France S. A. R. L. Smar GmbH Smar Mexico Av. Dr. Antonio Furlan Jr., 1028 3 Baishiqiao Road, Suite 30233 1, bld de l'Oise Robert-Koch-Strasse 35 11, Poniente, No. 1314-1 PB Sertãozinho SP 14160-000...
SENSOR WIRING ..........................3.2 JUMPER ONFIGURATION......................3.2 SENSOR CONFIGURATION ......................3.3 HOW TO CONNECT TWO SENSORS TO TT302 .................3.5 COMPENSATION OF LEAD RESISTANCE FOR RTD or Ohm .............3.6 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..............3.6...
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.
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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.
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.
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.
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.
TT302 – Fieldbus Temperature Transmitter Bus Topology and Network Configuration WARNING HAZARDOUS AREAS In hazardous zones with explosion proof requirements the covers must be tightened with at least 7 turns. In order to avoid moisture or corrosive gases, hand tighten the covers until the O- rings are compressed.
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.
TT302 – Fieldbus Temperature Transmitter (CPU) Central Processing Unit, RAM, PROM and EEPROM The CPU is the intelligent portion of the transmitter, being responsible for the management and operation of measurement, block execution, self-diagnostics and communication. The program is stored in a PROM. For temporary storage of data there is a RAM.
Resistance Temperature Detectors, most commonly known as RTD’s, are based on the principle that the resistance of metal increases as its temperature increases. Standardized RTDs, whose tables are stored in the memory of the TT302, are the following: JIS [1604-81] (Pt50 & Pt100) IEC, DIN, JIS [1604-89] (Pt50, Pt100 &...
This is particularly important at locations where the ambient temperature changes constantly. 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).
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.
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TT302 – Fieldbus Temperature Transmitter...
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 operator console. 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.
TT2EM301.CDR Figure 3.1 - Sensor Wiring 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 responsable to enable the local adjustment.
TT2EM302.CDR Figure 3.2 - Temperature Calibration - TT302 It is possible to configure connection and sensor type by means of parameters SENSOR_TYPE and SENSOR_CONNECTION. The connection and sensor types available are listed in the tables Table 3.1 - Sensor Type Table and Table 3.2 - Type of Connection Table, as well as the corresponding value.
Sensor Type chosen as described above. TT2EM304.CDR Figure 3.4 - Temperature Calibration - TT302 SENSOR_TYPE Pt 100 IEC Pt 100 JIS Pt 500 IEC Ni 120 DIN Cu 10 CE Pt 50 IEC...
FOUR WIRE Table 3.2 - Type of Connection Table How to Connect Two Sensors Transmitter 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 –...
For this reason, 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...
Configuration 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.
"Programming Using Local Adjustment". The resources on the transducer display, as well as for all the Series 302 field devices from SMAR, has the same methodology to handle with it. So, since the user has learned once, he is capable to handle all kind of field devices from SMAR.
Configuration Alpha_Num These parameters include two options: value and mnemonic. In option value, it is possible to display data both in the alphanumeric and in the numeric fields; this way, in the case of a data higher than 10000, it will be shown in the alphanumeric field. In option mnemonic, the display may show the data in the numeric field and the mnemonic in the alphanumeric field.
TT302 – Fieldbus Temperature Transmitter TT2EM309.CDR Figure 3.9 - Parameters for Local Adjustment Configuration TT2EM310.CDR Figure 3.10 - Parameters for Local Adjustment Configuration 3-10...
Place the magnetic In order to start the tool in orifice S and local adjustment, wait during 5 place the magnetic seconds. tool in orifice Z and wait until letters MD are displayed. TT2EM312.CDR Figure 3.12 - Step 1 - TT302 3-11...
S once from orifice S. more and LOC ADJ should be displayed. TT2EM313.CDR Figure 3.13 - Step 2 - TT302 Place the magnetic tool In this option the in orifice Z. In case this first variable (P_VAL) is is the first configuration,...
S up to set the value desired. TT2EM316.CDR Figure 3.16 - Step 5 - TT302 In order to configure the In order to connection(CONN), decrement the simply insert the magnet...
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TT302 – Fieldbus Temperature Transmitter 3-14...
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. For mV and thermocouples test can be done with connected and disconnected to the transmitter.
TT302 – Fieldbus Temperature Transmitter Disassembly Procedure Refer to Figure 4.2 - Exploded View. Make sure to disconnect the power supply before disassembling the transmitter. Sensor If the sensor is mounted on the transmitter, first disconnect the wires in order to prevent the wires from breaking.
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.
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TT302 – Fieldbus Temperature Transmitter SPARE PARTS LIST DESCRIPTION OF PARTS POSITION CODE HOUSING, Aluminum (NOTE 2) . ½ - 14 NPT 314-0130 . M20 x 1.5 314-0131 . PG 13.5 DIN 314-0132 HOUSING, 316 SS (NOTE 2) . ½ - 14 NPT 314-0133 .
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Maintenance Procedures NOTE For category A, it is recommended keep, in stock, 25 parts installed for each set, anf for category B, 50. It includes Terminal holder insulator, bolts (cover lock, grounding and terminal holder insulator) and identification plate without certification. 0-Rings are packaged in packs of 12 units.
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TT302 – Fieldbus Temperature Transmitter...
Section 5 Technical Characteristics Functional Specifications Inputs Signal Options see following table. 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.
TT302 – Fieldbus Temperature Transmitter Performance Specifications Accuracy See the following tables. Ambient Temperature Effect For a 10 ºC variation: mV (-6...22 mV), TC (NBS: B, R, S, T): ±0.03% of reading or 0.002 mV whichever is greater. mV (-10...100 mV), TC (NBS: E, J, K, N; DIN: L, U): ±0.03% of reading or 0.01 mV whichever is greater.
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Technical Characteristics 2, 3 or 4 WIRES DIFFERENTIAL MINIMUM ACCURACY MINIMUM ACCURACY RANGE (° ° ° ° C) RANGE (F) RANGE (° ° ° ° C) SENSOR TYPE RANGE (F) SPAN (° ° ° ° C) (° ° ° ° C) SPAN (°...
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TT302 – Fieldbus Temperature Transmitter MODEL TEMPERATURE TRANSMITTER TT302 CODE Local Indicator Without Indicator With Digital Indicator CODE Mounting Bracket for 2" Pipe Mounting Without Bracket Carbon Steel Bracket 316 SST Bracket CODE Electrical Connections 1/2-14 NPT M20 x 1.5 Pg 13.5 DIN...
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