M100 Thermocouple Temperature Transducer Selection Guide M100-TJ1 Type J thermocouple M100-TK1 Type K thermocouple Typical Applications The M100-TJ1 and TK1 measure the millivolt signal from of J and K type thermocouples respectively. Thermocouples are made from two dissimilar metals and as the temperature rises, the mV across the thermocouple increases. Thermocouple manufacturers provide tables showing temperature versus voltage characteristics of their thermocouples. The small voltage developed corresponds to a change in temperature. The M100 TJ1 / TK1 measures this voltage change and converts it to an output signal that corresponds to the temperature being monitored. The output from the M100-TJ1/ TK1 is not linearised. Thermocouple temperature measurement is used in a variety of applications, including monitoring of temperature of furnaces etc. The M100 thermocouple transducer is provided with automatic cold junction temperature compensation over the range 0-50 °C. Also provided is thermocouple break protection. Should the thermocouple leads break, the output from the transducer will go to its maximum or minimum output value, depending on which option is chosen at time of ordering. Ordering Information Product Code:Temperature:Output:Auxiliary:Frequency M100-TK1 0-500°C 1 mA 120V 60Hz Up scale Options 1. Non standard inputs / outputs only as far as technically acceptable. 2. A.C. Auxiliary in range 57.7 to 450 volts 3. Calibration at temperature other than 23°C 4. Up or down scale break protection Technical Specification Input Type J Fe/Const. Min. range 0-185°C (min. span 10mV) Max range 0-870 °C (max. span 50mV) Type K NiCr/NiAl Min. range 0-245 °C (min. span 10mV) Max. range 0-1230 °C (max. span 50mV) Impedance - >10kOhm Thermocouple Break protection Upscale or down scale optional Cold junction compensation - Automatic over the range 0-50 °C Overload - 10 x input continuous Output Rated value mA - 0-1/5/10/20 & 4-20mA Load resistance - 12/2.4/1.2/0.6 kOhm Rated value volts - 0-5 / 10 & 1-5 V Adjustments Zero - ±2% Span - ±10% Auxiliary A.C. Voltage - 115 / 230 / 400 V (± 25% / 45-65 Hz / < 2VA) D.C. Voltage - 24 / 48 / 110 V (± 20% / galvanically isolated / <3W) Weight and Case Approx. 0.4 kg. case 55mm Insulation IMPORTANT: No isolation is provided between input and output