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The temperature economical transmitter AT-2 is applicable to converting resistance of temperature sensor to standard current signal 4…20mA. Most of parameters such as: sensor type, input signal, measuring range may be adapted by user for specific requirements of his measuring system.
Application and function
User define type of sensor, measuring range in the order, the transmitter are programmed with required parameters and their values are printed on serial number label.
Technical data
Input signal Pt 100
Limit process 20Ώ
Min. measuring range 25C°
Output signal 4 – 20 mA
Power supply 7,5…30V DC
Load resistance Ro[kΏ]<(U z – 7,5V)/22mA
Alarm signal 22mA or 3,6mA
Accuracy for ΔR>20Ώ } 0,1%
Thermal error } 0,1% / 10°C
Ambient temperature -40…+85°C
Error due to supply voltage changes }0,01%/V
Note: for spans smaller than 75°C, the only permissible start values are: -40°C, -20°C, 0°C, +20°C and +40°C.