Force transfer standards according to ISO 376 class 00 and better
International metrological institutes and accredited calibration laboratories use force transfer standards of the type KTN from GTM for round robin tests. Thus, these reference force transducers are a central component for the uninterrupted traceability with all measurement uncertainties from the national standard to the industrial measuring equipment.
Force transfer standards (KTN) from the manufacturer GTM are characterized by high repeatabilities of ≤50 ppm with different standard force measuring devices and ≤20 ppm under comparable test conditions. Thereby, eccentric loads, disturbing forces or bending moments have only a minor influence on the measuring accuracy. According to the manufacturer, other positive features include long-term stability, hermetic encapsulation, extensive options such as double measuring bridges or bending moment measuring circuits Mx, My, as well as the comprehensive ISO 376-compliant mechanical accessories. This makes the force transfer standards particularly suitable for use as reference transducers or master sensors: In these applications, they are used directly in the test or calibration equipment.
Reference Force Transducer Series KTN-D
ISO 376 is the internationally recognized standard when it comes to the calibration of force transducers; class 00 is the highest classification. GTM has defined a standard with the factory accuracy class VN, which can exceed the class 00 many times over. The reference force transducers of the KTN-D series comply with GTM accuracy class VN (measuring range 40 % to 100 %) and ISO 376 accuracy class 00 (measuring range 10 % - 100 %). Thus, GTM offers the highest precision available on the market for comparison of national metrology institutes with each other or for traceability of accredited calibration laboratories. Other typical users are companies that offer force transducer calibration as a service or where a large number of force transducers are used that need to be calibrated regularly. Models of the KTN-D series cover a nominal force range from 10 kN to 5 MN.
Reference Force Transducer Series KTN-Z/D
Force transfer standards of the KTN-Z/D series are designed for measuring tensile and compressive forces with the highest precision according to ISO 376 Class 00. They can also be used as reference force transducers or master sensors with a nominal force range from 5 N to 1 MN in calibration machines. GTM manufactures the force transfer standards of this series according to ISO 376 class 00 and class 0.5 (measuring range 10 % to 100 %).
Force transducer series KTN-LF
GTM has developed the force transducers of the KTN-LF series for large nominal forces from 1 MN to 30 MN combined with low weight - they are available according to ISO 376 class 0.5 (measuring range 20 % to 100 %). The best-in-class force transfer standards for high static compressive forces are extremely robust and reliable, and also particularly tolerant of overload. According to the manufacturer, this makes them the optimal choice for calibrating testing machines at changing locations.
Source and further information: www.gtm-gmbh.com. The company will show the mentioned products among others at the SPS 2023 trade fair in Nuremberg (November 14 - 16).
