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  • Reliable alarm:

    level sensor with remote data transmission

  • ACS water level instruments:

    level measurement and recording of water levels

  • For the food sector:

    hygienic fill level measurement

  • ACS devices in use:

    pressure sensor

  • Water and waste water industry:

    level measurement in waste water treatment

  • Industry automation

Transcont KTM

2-wire-technology 4...20 mA, optional with PNP switching output or 3-wire-technology 0...10V


Pt100 Head transmitter KTM
block diagram pt100 signal converter

Advantages

  • 2-wire-technology 4...20mA, optional with a freely adjustable PNP switching output
  • 3-wire-technology 0...10V
  • 12 different standard measurement ranges or adjustment by customer specification
  • Connection of Pt100 in 2- or 3-wire circuit
  • Sensor breaking supervision
  • Certificated for the use in explosive hazardous areas

Application description

The temperature head transmitter KTM, for connection to an temperature resistor Pt100 is a temperature signal converter for measurement, conversion and supervision of temperatures in the range from -100°C to +600°C with a measurement span between 20 Kelvin and 700 Kelvin. 
Due to the implemented PNP switching output in the 2-wire-variant (4...20 mA), separate evaluation devices are not necessary in many cases.

Function description

The temperature head transmitter KTM can be installed in a connection head (form B) or in a field housing.

A constant current from an integrated current source is feed to a 2- or 3-wire Pt100 resistor that is installed in a sensor. This current leads to a voltage drop at the Pt100, that becomes higher or lower, dependent on the measured medium temperature. The produced resistance proportional voltage signal is measured by the transmitter and is than linearized and converted into a constant current signal 4...20mA or a constant voltage signal 0...10V.

The measured voltage signal of the Pt100 is supervised and in the case of sensor breakage a failure information is produced on to the 4...20mA resp. 0...10V output signal. The output signal rises in that case to 21,7 mA or 10,85 V. At a sensor short circuit the signal goes to 3,55 mA resp. 0 V. In the temperature head transmitter in 2-wire-technology with 4...20 mA, an optional freely adjustable overload and short circuit protected PNP switching output in working current principle is integrated.

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You will find at the technical manuals and/or datasheets as PDF. For this you need the Acrobat Reader, that you can download here.