Explosion-proof Thermocouple (Thermal Resistance)with Temperature Transmitter Display Tube

The Application of Thermocouple:

Thermocouple is usually used with display meter, recording meter and computer etc. to directly measure temperature of liquid ,vapor, gas medium and solid surface ranging from -200^oC to 1300^oC during various production processes with output of 4~20 Ma.

Features:

1.Multi explosion-proof type, good explosion-proof performance

2.Spring thermal element with good shock-resistant performance

3.Wide measuring range

4.High mechanical strength and good pressure-resistant performance

The Main Technical Parameters:

1.Standard: IEC 584, IEC 1515, IEC 751, GB 3836-2000, JB/T 5518-91, JB/T 7391-94.

2.Output Signal: 4~20Ma, Loading Resistance:250Ω, Transforming Wire Resistance:100Ω.

3.Output Method: Two Wire.

4.Accuracy Class of Temperature Transmitter:0.1, 0.2 ,0.5.

5.Accuracy of Display Meter: Analog lndication Class:2.5.

6.Digital Display Class:0.1.

7.Power Supply:24v.DC±10%.

8.Protection Class: IP65.

9.Explosion-proof Class:

       Explosion-separation: dll BT4, dll CT5, dll CT6

       Intrinsic Safety: iall CT 6

10.Insultation Resistance:

       Insulation resistance between instrument output wire connecting head and outer case shoule be no less than 50mΩ.

11.Thermal Response Time:

       When the temperature has step-jumping change, the needed time for current output signal of instrument changes to 50% of the step-jumping change, this time is called thermal response time, indicating with t0.5. When step-jumping response stable time of temperature transmitter is no more than 1/5 times of t0.5, thermal response time of instrument shall be considered as the thermal response time of thermocouple(thermal resistance)

       When step-jumping response stable time of temperature transmitter is no more than 1/2 times of t0.5, thermal response time of instrument shall be considered as the thermal response time of temperature transmitter.

12.Basic Error:

      The basic error of instrument should be no less than the compound error caused by thermocouple(thermal resistance) and temperature transmitter