Integrated temperature transmitter

Usually and display meter, recording meter, electronic computer etc., 4-20 ma output, direct measurement of carbon production site of chlorine and other explosives - 200 ℃ to 1300 ℃ range of liquid, steam, gas and solid surface temperature.
2, the characteristics of
4-20 ma two wire output, 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;
3, the working principle of
Explosion-proof thermocouple using the clearance flame-proof principle, when an explosion cavity, can remove from heat and cooling by joint clearance, made after the explosion flame temperature not reach all cavity, thus for explosion-proof.
Thermocouple, heat resistance) of thermoelectric potential (resistance) after temperature transmitter of bridge produce unbalance signal, after amplification into 4-20 ma dc signal to the instrument, the instrument will show the corresponding temperature value.
4, main technical parameters
Product standards
IEC584 IEC751 IEC1515 JB/T5518-91 JB/T7391-94 
5, temperature measuring range and tolerance
1) thermal resistance temperature measurement range and tolerance

2) thermocouple temperature measurement range and tolerance

6, the output signal: 4-20 mA, 250, load resistance transmission conductor resistance in 100
7, output method: two wire
8, precision grade:
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.
9, power supply, 24 v DC + 10 ℅
10, protection grade: IP65
11, explosion-proof level:
Flameproof: d Ⅱ BT4 d Ⅱ CT5 d Ⅱ CT6
Intrinsically safe: ia Ⅱ CT6
12, insulation resistance: the instrument output terminals between the shell and the insulation resistance shall be not less than 50.
13 and thermal response time:
When the temperature appear step change, the instrument of 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;
14, basic error:
The instrument shall not exceed the basic error thermocouple (resistance) and composite error of temperature transmitter basic error.
15, working environment:
Installation site level The temperature ℃ relative humidity % KPa atmospheric pressure
Cx1 -25-+55 5-95 86-106 Cx2 -25-+70 Cx3 -40-+80 

16, forensics list:
Level of explosion-proof explosion-proof number certification body
dⅡBT4 GYB97151 NEPSI 
dⅡBT4 GYB97152 NEPSI 
dⅡCT4 GYB97203 NEPSI 
dⅡCT4 GYB97204 NEPSI 
iaⅡCTT6 GYB99412 NEPSI 
iaⅡCTT6 GYB99413 NEPSI 
(note: NEPSI explosion-proof certification of national instruments instrumentation explosion-proof safety supervision and inspection)

17, the selection method of naming:

W (temperature instrument)

R - thermocouple Z - thermal resistance

M silicon nickel chrome - nickel silicon N nickel chrome - nickel copper nickel chrome - nickel E F iron - copper and nickel copper C - copper nickel/copper/P platinum C

(B) temperature transmitter

1 - no fixture 2 - fixed fixed flange threaded flange 4-3 - activity

5 - loose coupling type 6-7 - the form of fixed screw cone shape pipe connection type

Spray type 2 (junction box form) 4 explosion-proof type

0-16, 20, 2-1 - phi phi 16 high aluminum tube, 3-20 high aluminum tube