Temperature measuring resistor temperature transmitter

1. Summary: SBWR and SBWZ series thermocouples, as well as thermal resistance temperature transmitters, are temperature transmitter units installed on DDZ series instrument sites. They are used in combination with industrial thermocouples and thermal resistances, and adopt a dual wire transmission method (dual wires are shared transmission lines for power input and signal output). Convert the signals of industrial thermocouples and temperature measuring resistors into 4-20mA and 0-10mA output signals in a straight line with the input signal or temperature signal. This temperature transmitter can be directly installed on the terminal box of thermocouples and temperature measuring resistors to form an integrated structure. As a new generation thermometer, it is widely used in industrial sectors such as metallurgy, petroleum, chemical, power, light industry, textile, food, national defense, and scientific research. 2. Main features: ·; The sealing structure adopts silicone rubber and epoxy resin, which is suitable for setting up in earthquake resistant, moisture resistant, and harsh on-site environments; The on-site setting is used in the terminal box of thermocouples and thermal resistances, directly outputting 4-20mA and 0-10mA output signals. This saves expensive compensation wire costs and improves the anti noise capability in remote signal transmission; Thermocouple transmitters have automatic cold temperature compensation function; High precision, low power consumption, wide temperature range for use, stable and reliable operation; Widely applicable, even if it forms an integrated on-site installation structure with thermocouples and thermal resistors, it can be installed as a functional module on inspection equipment or instrument panels for use; The intelligent temperature transmitter can communicate with the upper computer through a HART modem, providing remote information management, composition, variable monitoring, calibration, and maintenance functions for the model, scale, and range of mobile phones, PCs, and transmitters; The intelligent temperature transmitter adjusts the display direction of the transmitter according to the actual needs of the user, and can display the measured medium temperature, changes in sensor values, output current, and percentage. 3. Working principle: Thermocouples or temperature measuring resistors convert the measured temperature into electrical signals and send them to the input network of the transmitter. This network includes related circuits such as zero sum thermocouple compensation. Input the zero adjusted signal into the operational amplifier, amplify the signal in the operational amplifier, perform V/I converter calculation processing on the amplified signal, and then output it through another path of 4-20mA DC current for A/D converter processing, and then display it in the header. There are two types of linearization circuits for transmitters, both of which use feedback methods. Correct the temperature measuring resistor sensor using positive feedback method, and correct the thermocouple sensor using multi segment line approximation method. The overall digital display temperature transmitter has two display modes. The temperature transmitter displayed on LCD outputs in a 2-wire manner, while the temperature transmitter displayed on LED outputs in a 3-wire manner. 4 . Technical parameter 1. Input signal: Thermocouple: k,e,j,b,s,t,n. Thermal resistance: Pt100, Cu50, Cu100 (three wire, four wire). The input signal of the intelligent temperature transmitter can be set arbitrarily through handheld and PC. The output signal is a 4-20mA DC signal within the range, which is linear with the input signal of the thermocouple and thermistor or linear with the temperature. Intelligent temperature transmitter is an isolated temperature transmitter that simultaneously overlaps 4-20mA DC signals and outputs protocol communication in accordance with the HART standard. The input and output are isolated, and the voltage of 500V is isolated, increasing the resistance to common mode interference and making it suitable for connection with computers. 3. Basic error: 0.5% FS, 0.2%. 4. Wiring methods: two-wire, three wire, four wire. 5. Display method: 4-person LCD displays on-site temperature, and the intelligent 4-person LCD can display any parameter of on-site temperature, sensor value, output current, and percentage through PC or mobile phone. 6. Operating voltage: ordinary 12V-35V, intelligent 12V-45V (24VDC power supply). Maximum load resistance R (max))=50 (Vmin-12), for example, when the rated operating voltage is 24V, the load resistance is 0-600Ω Choose to use within the scope. 8. Work environment: a : Environmental temperature -25-+80 ℃ (conventional type) -25-+70 ℃ (digital panel type) -25-+75 ℃ (intelligent type) b: Relative humidity: 5% -95% c: Mechanical vibration f≤ 50Hz, amplitude≤ 0.15mm d: no corrosive gas or other environment Environmental impact coefficient:& delta; & Le; 0.05%/℃. 5. The measurement range of material grading numbers for different temperature measurement ranges includes thermocouple nickel chromium alloy E 0-1000 ℃, nickel chromium alloy K 0-1300 ℃, any platinum rhodium 10 platinum s0~1600 ℃, platinum rhodium 30 platinum rhodium 6b0~1800 ℃, any copper copper T 0-400 ℃, iron copper J 0-1200 ℃, any thermal resistance copper Cu50-+150 ℃, any copper thermal resistance Cu 100-50-+15 ℃, any platinum temperature resistance Pt100-200-+600 ℃, and any other temperature range

6. Model code and description: (with sensor selected as temperature transmitter (pressure resistant and explosion-proof) thermocouple/resistor) Model description SBW temperature transmitter type r thermocouple z temperature measuring resistor body sensor 1 is K-type thermocouple/thermal resistance suitable for Pt100 2 is suitable for E-type thermocouple/thermal resistance suitable for Cu100 3 is suitable for J-type thermocouple/thermal resistance suitable for Cu50 4 is suitable for B-type thermocouple 5 is suitable for S-type thermocouple 6 is suitable for T-type thermocouple 7 corresponds to n-type thermocouple 8 User defined circuit type 0 Isolation type 1 Non isolation installation method 0 Conventional type 1 Special type 2 Wall mounted type 3 rail temperature transmitter 0 Regular type 1 Intel intelligent type 2 Digital display type 3 pointer type 4 Intelligent digital display type 5 Intelligent pointer type with HART protocol type

7. The wiring principle of the wiring and adjustable transmitter is shown in the diagram. Terminal 4 is the positive terminal of the 24V power supply, and terminal 3 is the 4-20mA current output terminal, which returns to the negative terminal of the 24V power supply through the load resistor R1. Connect the thermal resistance to terminals 1 and 2, or connect the positive pole of the thermocouple to 2 and the negative pole of the thermocouple to 1. The transmitter has zero and range adjustment knobs for easy fine-tuning by users. 8 . Inspection method: ·; When used in explosive hazardous areas, please pay attention to explosion-proof signs and protection levels; The environment for installing the electromechanical temperature transmitter must be within -20-+70 ℃. When the ambient temperature is too high, the SBWZ/R signal converter and display module can be set separately from the thermistor and thermocouple. Our factory has a dedicated explosion-proof enclosure for separating and installing transmitters; Before starting up, please carefully check the positive and negative polarity of the power supply to avoid making mistakes. There may be unclear results; The SBW signal converter module is cast and cured with epoxy resin to enhance vibration isolation performance and prevent moisture, corrosion, and moisture; The temperature transmitter needs to be checked after 6 months of use. a, Testing method for thermal resistance temperature transmitter; Equipment requirements: one digital voltmeter; Connect the wires through the system connection method; According to the sensor and range on the transmitter label, input the corresponding resistance value to output 1V and 5V (zero and full point volume can be adjusted respectively); Input the resistance values at the ten equal points of the measurement range and check if the temperature outputs meet the accuracy range; Testing should be conducted according to the technical specifications in the manual to meet the technical requirements. b, Inspection method for thermocouple temperature transmitter; Equipment requirements: one digital voltmeter; Connect the wires through the system connection method; According to the sensor and range on the transmitter nameplate, input the corresponding resistance values to output 1V and 5V respectively (zero and full volume can be adjusted separately); Input the potential values at 10 equal points in the microwave oven and check if the temperature outputs meet the accuracy range; Testing should be conducted according to the technical specifications in the manual to meet the technical requirements. 9. An order is a special specification order determined through negotiation between both parties. Suitable material protective tubes can be equipped according to user needs. Corundum tube and alumina protective tube, etc. If there are any other special requirements, please indicate them when placing an order; Operating environment temperature: -20-70 ℃; Power consumption:& le; 0.5W ·; Explosion proof mark: d‖BT4 ·; Protection level: IP54