Conclusions
It is necessary to take into account the impedance of the line when strain-gauge measurements are made with long connecting lines at a sufficiently high amplifier carrier frequency. This impedance can be obtained either experimentally, or analytically from formulas (9) or (14).
In order to obtain a minimum reduction in sensitivity of the measuring channel it is necessary to select the resistance of transducers as closely as possible to the modulus of the connecting-line characteristic impedance.
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Literature cited
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Itin, M.E., Manashkin, L.A. Relationship of the measuring-channel strain-gauge sensitivity to the amplifier carrier frequency and the connecting line. Meas Tech 9, 487–490 (1966). https://doi.org/10.1007/BF00976950
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DOI: https://doi.org/10.1007/BF00976950