Integrated temperature transmitter for SIS/DCS systems

Integrated temperature transmitter for SIS/DCS systems:

Product Description:

The integrated temperature transmitter used in SIS/DCS systems is a perfect combination of temperature sensors and transmitters, which converts temperature signals within the range of -200~+1600 ℃ into a two-wire 4-20mA DC electrical signal in a very simple way and transmits it to display instruments, regulators, recorders, DCS systems, SIS systems, etc., achieving accurate temperature measurement and control. Integrated temperature transmitter is an updated product for temperature measurement and control in modern industrial sites and research institutes. It is an essential product for distributed systems and digital bus systems.

1. Application

Usually used in conjunction with display instruments, recording instruments, electronic computers, etc., it outputs 4-20mA and directly measures the gas quality of liquids, vapors, and solid surface temperatures within the range of -200 ℃ to 1300 ℃ in the presence of explosives such as carbon and chlorine compounds in the production site.

2. Characteristics

Two line output 4-20mA, strong anti-interference ability;

Save the cost of compensating wires and installing temperature transmitters;

Safe and reliable, with a long service life;

Cold end temperature automatic compensation, non-linear correction circuit;

3. Working principle

Explosion proof thermocouples utilize the principle of gap explosion-proof. When an explosion occurs inside the chamber, it can be extinguished and cooled through the gap between the joint surfaces, preventing the full temperature of the flame after the explosion from being transmitted outside the chamber, thus achieving explosion-proof.

The thermoelectric potential (resistance) generated by the thermocouple (thermistor) passes through the bridge of the temperature transmitter to generate an unbalanced signal. After amplification, it is converted into a 4-20mA DC electrical signal and sent to the working instrument, which displays the corresponding temperature value.

4. Main technical parameters

Product execution standards

IEC584 IEC751 IEC1515 JB/T5518-91 JB/T7391-94

5. Output signal: 4-20 mA, load resistance 250, transmission wire resistance 100

6. Output method: Two line system

7. Accuracy level:

Temperature transmitter accuracy level: 0.1 0.2 0.5

Display accuracy level: Analog indicator 2.5 level; Digital display level 0.5

8. Power supply: 24V DC ± 10 ℅

9. Protection level: IP65

10. Explosion proof grade:

Explosion proof type: d Ⅱ BT4 d Ⅱ CT5 d Ⅱ CT6

Intrinsic safety type: ia Ⅱ CT6

11. Insulation resistance: The insulation resistance between the instrument output terminal and the housing should not be less than 50

12. Thermal response time:

When there is a step change in temperature, the time required for the current output signal of the instrument to change to 50% of the step change is usually represented by t0.5. When the step response stabilization time of the temperature transmitter does not exceed one-fifth of the thermocouple (resistance) thermal response stabilization time t0.5, the thermocouple (resistance) thermal response time is used as the thermal response time of the instrument; When the step thermal response stability time of the temperature transmitter does not exceed half of the thermocouple (resistance) thermal response stability time t0.5, the thermal response time of the temperature transmitter is used as the thermal response time of the instrument;

13. Basic error:

The basic error of the instrument should not exceed the combined error of the basic errors of the thermocouple (resistor) and temperature transmitter.

14. Work environment:

Installation site level Temperature ℃ Relative humidity% Atmospheric pressure KPa

Cx1 -25-+55 5-95 86-106 Cx2 -25-+70 Cx3 -40-+80

15. List of Evidence Collection:

Explosion proof level, explosion-proof certificate number, certification body

dddddddddB2BT4 GYB97151 NEPSI

dddddddddB2BT4 GYB97152 NEPSI

dⅡCT4 GYB97203 NEPSI

dⅡCT4 GYB97204 NEPSI

iaⅡCTT6 GYB99412 NEPSI

iaⅡCTT6 GYB99413 NEPSI

(Note: NEPSI explosion-proof certification is a national level instrument and meter explosion-proof safety supervision and inspection station)

16. Selection naming method:

W (temperature gauge)

R-thermocouple Z-thermistor

M nickel chromium silicon nickel silicon N nickel chromium nickel silicon E nickel chromium copper nickel F iron copper nickel C copper nickel//P platinum C copper

B (temperature transmitter)

1. No fixed device 2. Fixed thread 3. Flexible flange 4. Fixed flange

5-Flexible pipe joint type 6-Fixed thread cone form 7-Straight pipe joint type

2 Explosion proof type (junction box form) 4 Explosion proof type

0- ∼ 16, 1- ∼ 20, 2- ∼ 16 high alumina pipe, 3- ∼ 20 high alumina pipe

Typical model: WZPB-220