The integration of explosion-proof heat resistance

Integrated explosion-proof heat resistance characteristics: two wire output 4-20 ma, strong anti-interference ability;Save the compensation conductor and temperature transmitter installation cost;Safe and reliable, long life;The cold end temperature automatic compensation, nonlinear correction circuit;

The integration of explosion-proof working principle of the thermal resistance
In the working status measured by the change of the thermoelectric potential (resistance), unbalanced signals are generated from the bridge of temperature transmitter, after amplification into 4-20 ma electrical signal to the instrument, the instrument will display the corresponding temperature value.
Flame-proof thermocouple (resistance) using the clearance flame-proof principle, when an explosion cavity, can remove from heat and cooling by joint clearance, the explosion flame temperature and not reach outside the cavity, thereby for temperature measurement.Thermocouple (resistance) produce thermoelectric potential (resistance) after temperature transmitter of bridge produce unbalance signal, after amplification into 4-20 ma dc signal to workers instrument, the instrument shows the corresponding temperature value.
The integration of explosion-proof heat resistance is the main technical parameters
Product standards
IEC584
IEC751
IEC1515
JB/T5518-91
JB/T7391-94 
The integration of flameproof thermal resistance measurement range and tolerance
1) thermal resistance temperature measurement range and tolerance

Output signals: 4-20 mA, 250, load resistance transmission conductor resistance in 100
Output method: two wire
Temperature transmitter precision grade: 0.1 0.2 0.5
Display precision level: analog indicating 2.5 on the Richter scale;0.5 digital display type.
Power supply: 24 v DC + 10 ℅
Protection grade: IP65
Explosion-proof level:
Flameproof: d Ⅱ BT4 d Ⅱ CT5 d Ⅱ CT6
Intrinsically safe: ia Ⅱ CT6
: insulation resistance meter output terminals between shell and insulation resistance shall be not less than 50.
Thermal response time:
Integration of explosion-proof heat resistance when the temperature appear step change, the instrument of the current output signal changes to correspond to the step change of 50% of the time required, usually with t0.5 said when the temperature transmitter does not exceed the stable step response time of thermocouple (resistance) thermal response t0.5 five points at that time, stability time with thermocouple (resistance) thermal response time as the instrument of thermal response time;When the temperature transmitter of the step stable thermal response time is less than the thermocouple (resistance) half of the time stability of thermal response t0.5, temperature transmitter thermal response time is used as the instrument of thermal response time;
The basic error:
The instrument shall not exceed the basic error thermocouple (resistance) and composite error of temperature transmitter basic error.