Having a cold junction compensation Remote Isolated Thermocouple transmitter circuit diagram ISO102 XTR101


Posted on Mar 28, 2007

As shown in FIG grounds ISO102 and XTR101, op amp, isolated remote transmitter circuit having isolated thermocouple cold-junction compensation constituted power. The circuit co


Having a cold junction compensation Remote Isolated Thermocouple transmitter circuit diagram ISO102 XTR101
Click here to download the full size of the above Circuit.

nsists of four parts: the current loop amplifier XTR101, isolation amplifier ISO102, and isolated power operational amplifier OPA27 PWS725A. Using J-type thermocouple temperature detected at the scene, the temperature signal is converted to a voltage signal input XTR101, XTR101 by the amplified and converted into 4 ~ 20mA current output, through the twisted-pair transmission, input op amp OPA27. OPA27 current signal into the op amp input voltage signal -1 ~ -5V, and then after another OPA27 inverting input is amplified by ISO102, ISO102 isolation amplifier output after which the 500 potentiometer used to adjust the offset voltage, 5k potentiometers to adjust the gain. PWS725A isolated power supply for the isolated primary and secondary side power amplifier ISO102 provided respectively. The characteristics of this circuit is J-type thermocouple temperature detection and transmission site amplification and processing and control circuit isolation, improved anti-jamming capability of long-distance transmission signal circuits.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Audio Millivoltmeter
Dual-limit-microvolt-comparator
Ultraviolet light source UV-80 for PCB exposure
Attiny2313 based LAN cable tester
power supply How to measure the capabilities of a wall adapter
circuit diagram of remote control tester
Regulated Positive Voltage Booster
variable power supply with l200
IR Remote Control Jammer With 2N4403 PNP Transistor
An SCR Based Burglar Alarm
Aeration ponds remind circuit
Cost-effective nickel-cadmium battery charger LM393



Top