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NPL operates a calibration service for strain gauge bridge indicators (SGBIs) which is traceable to the national standards for AC voltage ratio. SGBIs are force measuring instruments and the method of calibration used is where the resistive strain gauge transducer is replaced by two calibrated inductive voltage dividers (IVD).
Two types of measurements are available:
The techniques above apply to SGBIs that are manufactured by HBM (Hottinger Baldwin Meßtechnik) of the types DK38, DMP39 and DMP40.
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