The RTD in-head mounted temperature transmitter connects to any standard pt100 resistance sensor and converts the linearised temperature to a (4 to 20) mA signal. The transmitter is a two wire device, and is fully configurable by the user, over a wide temperature range, with the aid of a simple push button. This design incorporates additional configuration menus, allowing the user to push button trim the transmitter output at both zero and span, ideal for trimming out sensor errors. The transmitters advanced circuitry guaranties high stability over the wide operating ambient temperature ranges experienced by head mounted devices. One of the transmitters features is the program LED, which provides visual indication of sensor fault when in normal operation and is also used to guide the operator through the simple menus during configuration.






















Sensor Type PT100 100R @ 0°C 2 or 3 Wire
Sensor Range (-200 to +850) °C (18 to 390) :
Sensor Connection Screw terminal
Minimum span (*1) 25 °C
Linearisation BS EN 60751(IEC 751) standard /JISC 1604
Measurement Accuracy (*2) 0.1 °C +/-0.05% of Reading
Thermal Drift 25ppm/ °C
Excitation current Lead Resistance effect 0.002 °C / Ohm
Maximum lead Resistance 20 ohms per leg
Output Type 2 wire 4 to 20 mA current loop
Output range (4.0 to 20.0) mA
Output Connection Screw Terminal
Maximum output 21.5mA (in high burnout condition)
Minimum output 3.8 mA (in low burnout condition)
Accuracy (mA output /2000) or 5uA
(Which ever is the greater)
Loop Voltage effect 0.2 uA / V
Thermal drift 1 uA / °C
Maximum output load [(Vsupply-10)/20]K Ohms
(Example: 700 ohms @ 24V)
Update time 500 mS
Response Time 1 second
Start up time 4 Seconds ( I out < 4 mA during
start up)
Warm-up time 1 minutes to full accuracy
Power Supply 10 to 30 Volts dc