◆Characteristics
Two lines systems output a 4-20 mAs, the anti- interference ability is strong;The economical repair leads line and installs temperature to change to send the machine expenses;The safety is dependable, the service life is long;Cold carry the temperature auto in expiation of, not the line correct electric circuit.
◆The work principle
The thermocouple is work the bottom of the appearance measure of the variety of[with] hot electricity power(electric resistance), change the electricity bridge creation unbalance signal of send the machine through temperature, convert to become the 4-20 mA telecommunication number to give after enlarge the work appearance, work the gauge show then to should of temperature value.
Can turn off through the coalescence noodles cleft with the cooling while separating to explode thermocouple( to make use of cleft to separate to explode principle, being the occurrence explosion inside the , make the flames and temperature of explode the empress could not spread the outside of the , Be thus carry on measuring.The thermocouple output hot electricity power(the electric resistance value) process temperature changes the electricity bridge creation unbalance signal of send the machine, converting direct current signal of become the 4-20 mAs to give the worker the appearance after enlarge, work the gauge display to should of temperature value.
◆Main technique parameter
The product performance standard
IEC584
IEC751
IEC1515
JB/T5518-91
JB/T7391-94
◆Measure the scope and bad
The hot electric resistance measures scope and bad
Type number cent degree the number measure scope ℃ accuracy grade to allow deviation
The WZPB Pt100 - 200-+the 500 A class B class ±(0.15+0.002 ItIs)
±(0.30+0.005 ItIs)
The WZCB Cu50 Cu100 - 50-+100 ±s(0.30+0.005 ItIs)
2)the thermocouple measure scope and 允 bad
Type number cent degree bad etc. class
I II
允 The bad value measure scope ℃ a bad value to measure scope
The WRNB K ± 1.5 ℃s-40-375 ±s 2.5 ℃s-40-333
The ± 0.004 ItIs 375-10000.0075 ItIses 333-1200
The WRMB N ± 1.5 ℃s-40-375 ±s 2.5 ℃s-40-333
The ± 0.004 ItIs 375-10000.0075 ItIses 333-1200
The WREB E ± 1.5 ℃s-40-375 ±s 1.5 ℃s-40-333
The ± 0.004 ItIs 375-8000.004 ItIses 333-900
The WRFB J ± 1.5 ℃s-40-375 ±s 1.5 ℃s-40-333
The ± 0.004 ItIs 375-7500.004 ItIses 333-750
The WRCB T ± 1.5 ℃s-40-125 ± one ℃ -40-133
The ± 0.004 ItIs 125-3500.0075 ItIses 133-1000
Output signal: 4-20 mAs, the load electric resistance 250, deliver to lead the line electric resistance 100
Output a method: Two lines systems
Accuracy grade:
The temperature changes to send the machine accuracy grade:0.1 0.2 0.5
Display accuracy grade:Imitate designation type 2.5 classes;numeral manifestation type 0.5 classes.
Power supply power supply:24V.The DC ± 10 ℅s
Protection grade:IP65
Flameproof grade:
Separate to explode a type:The BT4 d Ⅱ CT5 d Ⅱ CT6 of d Ⅱ
Essence safe type:The CT6 of ia Ⅱ
Insulate electric resistance:The gauge exportation's connecting a that the line carries son and outer shell to insulate electric resistance should be no smaller than 50.
The heat responds to time:
When the temperature appears a rank to jump variety, the electric current of the gauge outputs signal to change jump 50% of the variety to equal to that rank need of time, usually with t 0.5 mean being temperature changes a rank of send the machine to jump to respond to stable time and doesn't exceed the thermocouple heat to respond to stable time t 0.5 of five divide it at that time, then respond to time as the heat of the gauge to respond to time with the thermocouple heat; When the temperature changes a rank of send the machine to jump heat to respond to stable time and doesn't exceed the thermocouple heat to respond to stable time t 0.5 of two divide it at that time, then change to send to the machine heat to respond to time as the heat of the gauge to respond to time with the temperature;
Basic error margin:
The basic error margin of the gauge should not exceed thermocouple to change to send the machine basic error margin to synthesize an error margin with temperature. |
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