Industrial thermocouples – Part 2: Tolerances – SS-IEC THERMOCOUPLE THERMOMETRY. Thermocouple Accuracies. Tolerance classes for thermocouples to IEC Fe-Con (J). Class 1. IEC Reference, Edition, Title / Details. ASD-STAN prEN P1. Connectors, electrical, circular, scoop-proof, coupled by threaded ring, fire- resistant.
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Industrial thermocouples – Part 2: Tolerances
The construction variants of temperature sensors are as many and diverse as the measuring tasks. Thermocouples are very fast and provide a large measuring range. The following accuracy is specified for the NTC temperature sensor with a cable length of 2 meters:. The high precision of the digital temperature sensor is independent from connected extension cables.
Surface sensors with flat measuring tip – 58-42 measurements on good heat conductors, on even and plain surfaces. Thermocouples Thermocouples consist of two spot-welded wires of different metals or alloys.
When measuring temperatures 58-42 negative temperature coefficient is utilised, i. Transducer with free sensor – For measurements in air and gases. The operative range is specified for every sensor — depending on its construction. Linearization of the NTC characteristic according to Galway Steinhart with accurate calculation method.
Thermocouples consist of two spot-welded wires of different metals or alloys. The measuring resistor is fed with a constant current and the voltage drop at the resistor is measured as a function of the temperature. With immediate effect, the sensor connecting cables for many sensor types will use a new thermal line stranded wire, thermal line class 2 instead of the conventional compensation line.
Infrared sensors do not contact the device under test and they have very small ied constants, but they depend on the emission grade. The following accuracy is specified for the NTC temperature sensor with 58-42 cable length of 2 meters: Additionally, the operative ranges of the connecting cable and the transition sleeve or the like have to be considered.
The compensation lines generally comply with Class 2 as per DIN The temperature sensors listed are also available, on request, with other lengths and diameters.
Connecting cable with thermal line stranded wire There is no adverse temperature effect at the juncture from measuring element to cable.
For example, thermocouples, resistor-based sensors Pt and Ntc and pyrometers infrared sensors are available. Additionally, the operative ranges of the connecting cable and the transition sleeve or similar have to be considered. Sensor with penetrating tip – For measurements in plastic and pasty substances. Thanks to this procedure the slightest deviations are archived on the calibrated temperature points.
Standard – Industrial thermocouples – Part 2: Tolerances SS-IEC –
Due to the small resistance variation 0. The larger the measuring range, the more universal the possible range of applications.
Thus, the measuring accuracy can be significantly increased. Measuring range Accuracy Response time Stability Type of construction. T max is the maximum operating temperature of the sensor tip. An increased accuracy can be achieved by a multi-point adjustment of the sensor during the calibration process.