Thermal signal isolator/converters are capable of recording and linearising thermal voltages and then converting them into standardised DC current/voltage signals.
Conventional thermocouples can be connected on the input side, in accordance with IEC 564. This measures the thermal voltage that is created when two different metal alloys come into contact with each other. A differential amplifier is used to process these values and convert them into standardised signals.
The high-quality signal converters use a micro-processor to simultaneously prepare (filter and linearise) the measurement signal.
Any falsification of the thermal signals caused by terminal points or line influences must also be eliminated.
This is accomplished with the integrated cold-junction compensation mechanism. This mechanism measures the temperature at the terminal (junction) point and uses the value for the micro-processor calculation.
The input and output parameters on the Thermo signal converter can be configured as required. An LED signals when there is a line break on the thermal wire. These devices are available with or without electrical isolation.
They can be used for a wide range of process automation and industrial automation applications where temperatures are being recorded.