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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Basics of temperature measurement
Resistor-Based Sensors Pt Sensors. Infrared sensors do not contact the device under test and they have very small time constants, but they depend on the emission grade. The following accuracy is specified for the NTC temperature sensor with a cable length of 2 meters:.
Thanks to this procedure the slightest deviations are archived on the calibrated temperature points. Measuring range Accuracy Response time Stability 854-2 of construction. Thus, the measuring accuracy can be significantly increased.
Measuring range PT resolution 0. Connecting cable with thermal line stranded wire There is no adverse temperature effect at the juncture from measuring element to cable 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.
Sword probe – For measurements in paper, cardboard and textile stacks. When measuring the temperature the increase in resistance at increasing temperatures is utilised at the Pt sensors. Pt Sensors When measuring the temperature the increase in resistance at increasing temperatures is utilised at the Pt sensors.
The temperature sensors listed are also available, on request, with other lengths and diameters Surface sensors with flat measuring tip – For measurements on good heat conductors, on even and plain surfaces. When measuring temperatures their negative temperature coefficient is utilised, i.
The adjustment can be realized in 2 points zero, gradient or in over 30 points as multi-point adjustment. The larger the measuring range, the more universal the possible range of applications.
Linearization of the Pt characteristic with accurate calculation method. These values refer to the sensor tip. Linearization of the NTC characteristic according to Galway Steinhart with accurate calculation method.
The compensation lines generally comply with Class 2 as per DIN Resistor-based sensors are more accurate but slower.
Transducer with free sensor – For measurements in air and gases. Processing, crossing points, terminal points and connecting cable influence the accuracy of the temperature sensor. For just a few sensor types and extension cables a compensation line will continue to be used as previously. Surface sensors with flat measuring tip – For measurements on good heat conductors, on even and plain surfaces.
Industrial thermocouples – Part 2: Tolerances
The thermoelectric effect at the contact surface is used to measure temperatures. Thermocouples are very fast and provide a large measuring range. The accuracy 54-2 within in the above specified range of validity.
The most popular thermocouple is the NiCr-Ni type K. Additionally, the operative ranges of the connecting cable and the transition sleeve or similar have to be considered.
Standard – Industrial thermocouples – Part 2: Tolerances SS-IEC –
Select the temperature sensor that suits your measuring task according to the criteria below: Transducer with free sensor – For measurements in air and gases We can manufacture it according to your specifications technical drawing or detailed specification and supply you with a customised sensor! The construction variants of 58-2 sensors are as many and diverse as the measuring tasks.
Thermocouples consist of two spot-welded wires of different metals or alloys. Thermocouples Thermocouples iecc of two spot-welded wires of different metals or alloys. Ntc sensors are very fast, accurate, but they have a limited measuring range.
The accuracy of the sensor element is manufacturer-specific. The 58-2 precision of the digital temperature sensor is independent from connected extension cables.
Several accuracy classes are defined for the Pt sensor.