1. Foreword It is well known that temperature is the most basic parameter in industrial monitoring and control systems. Due to the increasing requirements for the reliability and accuracy of industrial measurement and control systems, the need for advanced temperature measurement technology and the urgency of high-precision temperature measurement equipment It will become stronger and stronger. In order to improve the accuracy of the temperature measurement system, on the one hand, the performance of the temperature sensor should be improved. On the other hand, efforts should be made to improve the conversion accuracy of the temperature sensor signal to a receiving device such as a DCS PLC. At present, there are mainly two ways to convert the temperature sensor signal: one is through the temperature card of the system such as DCS PLC, and the other is through the temperature transmitter. However, the advantages of using a temperature transmitter to convert a temperature card are unmatched:
1 In the field, the weak signal of the temperature sensor is changed into a strong current and voltage signal, so that the reliability of transmission is good, and the resistance to radio-frequency electromagnetic interference is strong. 2 The range can be set according to the actual application, so that the precision of the temperature card is higher than that of the wide range. 3 The output signal is a standard current and voltage signal to facilitate the standardization of the entire system. 4 No compensation wire is required. Lead resistance is not required to eliminate the source of error, thus improving the measurement accuracy. 5 Integration with the temperature sensor junction box. Application flexibility. The head indicates that the temperature can be seen here. Using the temperature transmitter is the ideal way to convert the temperature signal. The temperature transmitter plays an important role in the temperature measurement and control of industrial processes.
2. Overview The thermal resistance temperature transmitter WJ11 series developed by WAYJUN is mainly used for the isolation and transmission of sensor signals such as Pt100, Pt1000, Pt10, Cu50, and Cu100 (the sensor needs to be equipped by the user). The industry is mainly used to measure the temperature of -200~+600°C. The transmitter has linearization and long-line compensation functions. It is calibrated according to the Pt100 national standard indexing table before delivery and fully meets the 0.2-level accuracy requirement. The input, output, and auxiliary power supplies are completely isolated (triple isolation) and can withstand 2500 VDC isolation withstand voltage. Products using DIN35 international standard rail installation, small size, high precision, stable performance, cost-effective, can be widely used in petroleum, chemical, electric power, instrumentation and industrial control and other industries.
WJ11 series temperature signal isolation amplifier is very convenient to use, only need to connect a good line, you can achieve the thermal resistance signal isolation transmission.
3. The main features:
>>Input: Pt100 (-200~+600°C) (range selectable)
You can also choose to enter Pt1000, Pt10, Cu50, Cu100, etc.
>>Output signal: 4~20mA, 0~5V, 0-10V and other standard signals
>>Auxiliary power supply: 5V, 9V, 12V, 15V or 24V DC single power supply
>>Industrial temperature range: - 45 ~ + 85 °C
>> Accuracy class: 0.2 (FSR%, relative to temperature)
>> Includes linearization and long-term compensation
>>Isolation pressure: 2500VDC (1mA, 60S), input/output/power isolation
>> Installation: DIN35 rail mounting
>>Dimensions: 79x69.5x25mm
4 product selection:
Input: Pt100 Temperature Range: -20~100°C Supply Voltage: 24V Output: 4-20mA
Model: WJ11-Z1-T1-P1-A4
Input: Pt1000 Temperature range: 0~200°C Supply voltage: 12V Output: 0-10V
Model: WJ11-Z5-T4-P2-V2
Download: http://UploadFiles/2012716104820346.pdf
The DC power meters are applicable to the measurement of DC distribution system. The transformation ratio of this series of meters is programmable. They supports digital input, relay output, analog output and communication functions. They provide a variety of different installation sizes and can directly replace the analog pointer ammeter.Some models also support DIN rail installation and can be used as DC multifunctional power meters.
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