Integrated digital temperature transmitter

Integrated digital temperature transmitterWidely used in various departments such as metallurgy, petroleum, chemical, power, light industry, textile, food, national defense, and scientific research.
Integrated digital temperature transmitterfeature
1. Two wire output 4-20mA, strong resistance to * *;
2. Save the cost of compensating wires and installing temperature transmitters;
3. Safe and reliable, with a long service life;
4. Automatic compensation for cold end temperature and non-linear correction circuit.
5. Convert the measured environmental temperature into a single standard DC voltage or DC current output in linear proportion;
6. Low power consumption and high reliability;
7. Excellent resistance;
8. Plug and unplug terminal interfaces, standard rail installation;
9. Small size;

Main technical indicators

thermocouple

Allowable deviation of electromotive force

Note: 1) t is the measured temperature (℃)
2) Allowable deviation, take the larger of the two values.

platinum resistance thermometer
Accuracy level of platinum thermistor: A or B level
Scale mark: Pt100 Resistance value at 0 ℃: R0=100 ± 0.06 Ω (*)
R0=100 ± 0.12 Ω (Class B)
Allowable deviation Δ t (℃):
Pt100±(0.15+0.002∣t∣)(*)
Pt100 ± (0.30+0.005 ∣ t ∣) (Grade B)
Cu50±0.1%R0
Cu100±0.1%R0
Thermal response time: Т 0.5<90S
Transmitter components
Input: Thermistor: Pt100, Cu50, Cu100
Thermocouple: K.E.S.B.T.N
Output: Within the range of measurement, output a 4-20mA DC signal that is linear with the input resistance signal of the thermistor and linear with the millivolt signal input by the thermocouple.
Basic error: Calculation formula Δ=Δ 1+Δ 2
The allowable deviation of Δ 1 thermocouple (resistance) corresponds to the basic output error.
Δ 2 transmitter output basic error Δ 2=± 0.5% FS
Transmission method: two-wire system
Load: The maximum load resistance is calculated according to the following formula:
RL (max)=50 × (Vmin-12) (i.e. the load resistance can be selected within the range of 0-600 Ω at 24V, with a rated load of 250 Ω). )
Normal working environment:
a. Environmental temperature: -25 ℃ to 80 ℃ (not higher than 70 ℃ in hazardous areas).
b. Relative humidity: 5% to 95%.
c. Mechanical vibration: f ≤ 55Hz, amplitude<0.15mm
d. There is no medium in the surrounding air that can cause corrosion of the transmitter.
e. Environmental temperature impact: ≤ 0.05%/1 ℃

Model Number

Example SBWR-2180/where 230 is equivalent to WRE230

Attention to use:
1. Wiring: The wiring of the safety spark circuit (input signal line) must be insulated or shielded wires, and isolated from the wiring of non safety spark circuits to avoid mutual contact.
2. Different models of temperature transmitters should be wired according to the instructions. When wiring explosion-proof instruments with safety spark circuits, they must not be connected incorrectly and carefully checked for short circuits or incorrect connections.
3. When using temperature transmitters, special attention should be paid to the distinction between ordinary and intrinsic safety types. Ordinary types cannot be installed in hazardous areas, while intrinsic safety types can be installed in hazardous areas.
4. The input of the thermal resistance transmitter is a three wire system, and the line resistance of each connecting wire should be equal and within the same ambient temperature.