ZRN-WZB series of wall-mounted temperature sensors, temperature transmitters and SBWZ series thermal resistance temperature transmitter is DDZS series of instruments in the field mounted temperature transmitter unit. It uses a two-wire transmission mode (power input and signal output for two Root common wiring), and outputs the measured temperature into a linear 4 ~ 20mA current signal; a three-wire transmission mode (common ground), and outputs the measured temperature of 0 ~ 10mA linear current signal transmitter can be mounted on the thermal resistance. The junction box with the formation of integrated structure can also be installed as a separate unit in the dashboard conversion. As a new generation of Thermometer can be widely used in petroleum, chemical, textile, metallurgy, machinery, electric power, aviation, food processing industrial and scientific fields, medical engineering, automated temperature detection, transmission and control.
ZRN-WZB Series Wall Mount Thermal resistance Temperature transmitter has the following significant advantages:
(1) Operating temperature width: -25 ℃ ~ + 120 ℃;
(2) high precision cold junction compensation circuit, the whole temperature range absolute error ± 0.5 ℃ (S thermocouple ± 0.8 ℃);
(3) advanced non-linear correction circuit, output signal and a linear relationship between the measured temperature;
(4) with drift self-tuning system, to ensure accuracy over the entire operating temperature range;
(5) with a special heat-control mechanism, effective control of heat conduction;
(6) the use of epoxy resin, corrosion resistance, shock resistance, and high reliability;
(7) apply a wide range, either to form an integrated structure with on-site installation of thermocouple, RTD, but also as a function module
Installed in the detection device;
(8) A unique anti-jamming circuit design, to ensure the safety and reliability of the transmitter can work in a variety of interference by; special
Do not have immunity to electromagnetic interference means adapted to modern electromagnetic pollution of the environment seriously.
(9) The temperature transmitter range can be adjusted with the user requirements range.
Second, the principle
The transmitter circuit module by the amplification unit, linearization unit, a voltage / current conversion, self-correction circuit and reverse voltage protection circuit adjusting unit and other components, with thermocouple for temperature measurement element transmitter also includes cold junction compensators, heat resistance temperature measurement element also includes R / V conversion unit.
Third, the major technical indicators
1. Basic error: ± 0.2%, ± 0.5%;
2. The ambient temperature change: 0.2 0.02% FS / ℃;
0.5 0.05% FS / ℃;
3. Output signal: 4 ~ 20mA, two wire transmission; 0 ~ 10mA, three-wire transmission
4. Load Resistance: 0 ~ 600Ω;
5. Power supply: 14 ~ 34VDC (intrinsically safe temperature transmitter: 22 ~ 35VDC);
6. Working environment: (1) Ambient temperature: -25 ~ + 85 ℃ (Normal temperature transmitter);
Ambient temperature: -25 ~ 120 ℃ (high temperature ambient temperature transmitter);
(2) Relative humidity: 5 ~ 95% RH, non-condensing;
7. isolation: 1000Vrms
8. proof grade: dⅡBT4; (need user request)