TF, TS, Thermolog
5 Operation and control
DANGER
Electric voltage
Risk of electric shock
a) Disconnect the unit from the mains when performing any maintenance.
b) Secure the equipment from accidental restarting.
c) The unit may only be maintained and opened by instructed, competent personnel.
The pin assignment for the respective models are listed in chapter
5.1 TF-M-Pt100/TF-E-Pt100/TF-M-Pt100-VAL Temperature Sensor
Type TF temperature sensors use a Pt100 temperature sensor per DIN/IEC 751 class B to generate a temperature-dependent res-
istance signal. The Pt100 sensor is installed at the lowest point of the sensor tube to always ensure sufficient contact with the
medium being measured.
The temperature sensor TF-M-Pt100-VAL was designed for measuring storage temperatures and has a spring-loaded sensor
tube to allow installation free of play with a constant contact pressure at the measuring point.
5.2 TSM/TSK/TSA Bi-Metal Temperature Switch
The TS temperature sensors have a bi-metal temperature switch to signal a set temperature value. Unlike the TSM standard ver-
sion, the TSK and TSA versions with bi-metal switches have a lower hysteresis.
The TSA version is further specifically designed for installation in tube systems and cooling matrices.
The bi-metal switch is installed at the lowest point of the sensor tube to always ensure sufficient contact with the medium be-
ing measured.
5.3 Thermolog MK2/EK2 Temperature Sensor with 4-20mA Output
Type MK2 and EK2 temperature sensors use a Pt100 temperature sensor per DIN EN/IEC 60751 Class B to generate a temperat-
ure-dependent resistance signal.
The built-in electronics convert this resistance signal into a standard 4-20 mA two-lead signal.
The Pt100 sensor is installed at the lowest point of the sensor tube to always ensure sufficient contact with the medium being
measured.
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Bühler Technologies GmbH
BE140006 ◦ 11/2019
