TEMPERATURE AND HUMIDITY DEPENDENCE ON STABILITY OF TORQUE MEASURING DEVICES

Tassanai Sanponpute, Nittaya Arksonnarong

Abstract

Effect of temperature and humidity on torque measuring devices were studied.With the aim to estimate measurement uncertainties due to environmental varying conditions, torque transfer wrenches and transducers were carried out by the measurement in an environmental controlled chamber under conditions of range 16°C to 31°C and 35%RH to 65%RH. The measurement responses from two kind of amplifiers, alternating current and direct current excitation amplifier were taken into account as well. The temperature sensitivity was significantly minimized causing by temperature compensation circuit. Moreover, the humidity sensitivities from several kinds of torque device structure consisted of directly contact to ambient, covering protection, waterproof protection and hermetically sealed seem to be similar and cannot be distinguished. On the other hand, amount of humidity sensitivity obtained by using direct current excitation amplifier are smaller than using alternating current excitation amplifier.

Keywords

torque measuring devices, temperature sensitivity, humidity sensitivity

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IMEKO-TC3-2014-006.pdf

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IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

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